The hydrostatic pressure is expected to be an effective knob to tune the magnetostructural phase transitions of hexagonal MM’X alloys(M and M’denote transition metals and X represents main group elements).We perform...The hydrostatic pressure is expected to be an effective knob to tune the magnetostructural phase transitions of hexagonal MM’X alloys(M and M’denote transition metals and X represents main group elements).We perform magnetization measurements under hydrostatic pressure on an MM’X martensitic MnNi0.77Fe0.23Ge alloy.The magnetostructural transition temperature can be efficiently tuned to lower temperatures by applying moderate pressures,with a giant shift rate of-151 K/GPa.A temperature span of 30 K is obtained under the pressure,within which a large magnetic entropy change of-23 J·kg-1K-1 in a field change of 5 T is induced by the mechanical energy gain due to the large volume change.Meanwhile,a decoupling of structural and magnetic transitions is observed at low temperatures when the martensitic transition temperature is lower than the Curie temperature.These results show a multi-parameter tunable caloric effect that benefits the solid-state cooling.展开更多
Solid bubbles have expanded the SERS assay toolbox,but their detection performance in biofluids is still hampered by the irrational design of the plasmonic sensing interface.A plasmonic bubble aggregate-driven DNA-enc...Solid bubbles have expanded the SERS assay toolbox,but their detection performance in biofluids is still hampered by the irrational design of the plasmonic sensing interface.A plasmonic bubble aggregate-driven DNA-encoded SERS assay is reported here that enables simultaneous,ultrasensitive,and specific detection of multiple miRNAs in blood samples for accurate cancer diagnosis.In this assay,the buoyancy of plasmonic bubbles allows them to self-aggregate at a droplet apex for SERS reconfiguration,form single-layer bubble aggregates with plasmonic nanogaps,and prevent the coffee ring effect during evaporation assembly.Furthermore,DNA-encoded plasmonic bubbles seamlessly couple with dual-color catalytic hybridization assembly to amplify the specific miRNA-responsive Raman signal,and function as both an analyte concentrator and a Raman signal aggregator without external forces.Using these merits,this magnet-free,portable assay achieves femtomolar dual-miRNA quantitation with single-base resolution,simultaneous miRNA detection across four cell lines,and accurate cancer diagnosis(AUC=1)via analyzing 40 blood samples with machine learning,thus providing a promising tool for clinical diagnosis.展开更多
Uniform silver-containing metal nanostructures with well-defined nanogaps hold great promise for ultrasensitive surface-enhanced Raman scattering （SERS） analyses. Nevertheless, the direct synthesis of such nanostruc...Uniform silver-containing metal nanostructures with well-defined nanogaps hold great promise for ultrasensitive surface-enhanced Raman scattering （SERS） analyses. Nevertheless, the direct synthesis of such nanostructures with strong and stable SERS signals remains extremely challenging. Here, we report a DNA-mediated approach for the direct synthesis of gold-silver nano-mushrooms with interior nanogaps. The SERS intensities of these nano-mushrooms were critically dependent on the area of the nanogap between the gold head and the silver cap. We found that the formation of nanogaps was finely tunable by controlling the surface density of 6-carboxy-X-rhodamine （ROX） labeled single-stranded DNA （ssDNA） on the gold nanoparticles. We obtained nano-mushrooms in high yield with a high SERS signal enhancement factor of -1.0×109, much higher than that for Au-Ag nanostructures without nanogaps. Measurements for single nano- mushrooms show that these structures have both sensitive and reproducible SERS signals.展开更多
Atomically precise gold nanoclusters(Au NCs) are an emerging class of quantum-sized nanomaterials with discrete electronic energy levels, which has led to a range of attractive electronic and optical applications. Nev...Atomically precise gold nanoclusters(Au NCs) are an emerging class of quantum-sized nanomaterials with discrete electronic energy levels, which has led to a range of attractive electronic and optical applications. Nevertheless, the lack of general methods to transfer Au NCs protected with hydrophobic ligands to an aqueous solution hampers their use in physiological settings. Here,we developed a single-stranded DNA-based approach that could transfer ~90% hydrophobic Au NCs into an aqueous solution.We experimentally and theoretically established that multivalent electrostatic and hydrophobic interactions between DNA strands and the hydrophobic ligand layer on Au NCs resulted in monodispersed DNA-coated Au NCs with high physical integrity in an aqueous solution. The fluorescence quantum yield of Au NCs was increased by ~13 fold, and surface-constrained DNA retained the specific recognition ability for biosensing. We further demonstrated the versatility of this phase-transfer approach, which thus holds great potential to advance biological and medical applications of Au NCs.展开更多
Co_(3)Sn_(2)S_(2) is a recently identified magnetic Weyl semimetal in Shandite compounds. Upon cooling, Co_(3)Sn_(2)S_(2) undergoes a ferromagnetic transition with c-axis polarized moments(0.3 μ_(B)/Co) around T_(C)=...Co_(3)Sn_(2)S_(2) is a recently identified magnetic Weyl semimetal in Shandite compounds. Upon cooling, Co_(3)Sn_(2)S_(2) undergoes a ferromagnetic transition with c-axis polarized moments(0.3 μ_(B)/Co) around T_(C)= 175 K, followed by another magnetic anomaly around T_(A)≈ 140 K. A large intrinsic anomalous Hall effect is observed in the magnetic state below TC with a maximum of anomalous Hall angle near T_(A). Here, we report an elastic neutron scattering on the crystalline lattice of Co_(3)Sn_(2)S_(2) in a magnetic field up to 10 T. A strongly anisotropic magnetoelastic response is observed, while only a slight enhancement of the Bragg peaks is observed when B//c. The in-plane magnetic field(B//ab) dramatically suppresses the Bragg peak intensity probably by tilting the moments and lattice toward the external field direction. The in-plane magnetoelastic response commences from T_(C), and as it is further strengthened below T_(A), it becomes nonmonotonic against the field between T_(A) and T_(C) because of the competition from another in-plane magnetic order. These results suggest that a magnetic field can be employed to tune the Co_(3)Sn_(2)S_(2) lattice and its related topological states.展开更多
Magnetic topological materials, which combine magnetism and topology, are expected to host emerging topological states and exotic quantum phenomena. In this study, with the aid of greatly enhanced coercive fields in h...Magnetic topological materials, which combine magnetism and topology, are expected to host emerging topological states and exotic quantum phenomena. In this study, with the aid of greatly enhanced coercive fields in high-quality nanoflakes of the magnetic Weyl semimetal Co_(3)Sn_(2)S_(2), we investigate anomalous electronic transport properties that are difficult to reveal in bulk Co_(3)Sn_(2)S_(2) or other magnetic materials. When the magnetization is antiparallel to the applied magnetic field, the low longitudinal resistance state occurs, which is in sharp contrast to the high resistance state for the parallel case. Meanwhile, an exceptional Hall component that can be up to three times larger than conventional anomalous Hall resistivity is also observed for transverse transport. These anomalous transport behaviors can be further understood by considering nonlinear magnetic textures and the chiral magnetic field associated with Weyl fermions, extending the longitudinal and transverse transport physics and providing novel degrees of freedom in the spintronic applications of emerging topological magnets.展开更多
We report a comprehensive neutron scattering study on the spin excitations in the magnetic Weyl semimetal Co3Sn2S2 with a quasi-two-dimensional structure.Both in-plane and out-of-plane dispersions of the spin waves we...We report a comprehensive neutron scattering study on the spin excitations in the magnetic Weyl semimetal Co3Sn2S2 with a quasi-two-dimensional structure.Both in-plane and out-of-plane dispersions of the spin waves were revealed in the ferromagnetic state.Similarly,dispersive but damped spin excitations were found in the paramagnetic state.The effective exchange interactions were estimated using a semi-classical Heisenberg model to consistently reproduce the experimental TCand spin stiffness.However,a full spin wave gap below Eg=2.3 meV was observed at T=4 K.This value was considerably larger than the estimated magnetic anisotropy energy(~0.6 meV),and its temperature dependence indicated a significant contribution from the Weyl fermions.These results suggest that Co3Sn2S2 is a three-dimensional correlated system with a large spin stiffness,and the low-energy spin dynamics can interplay with the topological electron states.展开更多
Identification and differentiation of various bioanalytes with high spatial and temporal resolution have spawned fluorescent barcode-based detection and imaging.DNA nanostructures with excellent structure programmabil...Identification and differentiation of various bioanalytes with high spatial and temporal resolution have spawned fluorescent barcode-based detection and imaging.DNA nanostructures with excellent structure programmability,addressability,and nearatomic structure accuracy have emerged as a versatile platform to develop fluorescent barcodes through finely controlled dye numbers,relative distances,and compositions.A variety of DNA fluorescent barcodes with distinguishable spectral colors,geometries and digitized fluorescence intensities have been constructed and favorably implemented in the field of bioimaging,multiplex bioassay,and information security.In this review,we first summarize the state of the art of self-assembled DNA nanostructures.Next,the utilization of DNA nanostructure to develop fluorescent barcodes and the photophysical properties of DNA-templated fluorophores are reviewed.Finally,the applications of DNA fluorescent barcodes for biosensing and imaging,and the challenges and outlook of DNA nanostructure-engineered fluorescent barcodes are discussed.展开更多
Colorectal cancer(CRC)is still a major killer,mainly due to the lack of early detection biomarker with sensitivity/specificity.Conventional histopathology is the gold standard approach in practice,but there are still ...Colorectal cancer(CRC)is still a major killer,mainly due to the lack of early detection biomarker with sensitivity/specificity.Conventional histopathology is the gold standard approach in practice,but there are still some issues(false diagnosis and long waiting period).Aggregation-induced emission(AIE)is a novel photophysical phenomenon which has been widely utilized for biological imaging in vitro,including malignant cells,showing remarkable imaging contrast and enhanced emission in high concentrated state.However,it is unclear if AIE dyes can identify malignant cells specifically in vivo.A great challenge for specific labeling of malignant cells is probably ascribed to the complex compositions in tumor tissues.Herein,an AIE dye-based mitochondria-targeted histological staining strategy was employed to localize cancer and the metastatic track in the fresh colorectal cancer.This novel approach holds great potential to revolutionize the clinical diagnosis and intervention for devastating malignancy.展开更多
The modulation of topological electronic state by an external magnetic field is highly desired for condensed-matter physics.Schemes to achieve this have been proposed theoretically,but few can be realized experimental...The modulation of topological electronic state by an external magnetic field is highly desired for condensed-matter physics.Schemes to achieve this have been proposed theoretically,but few can be realized experimentally.Here,combining transverse transport,theoretical calculations,and scanning tunneling microscopy/spectroscopy(STM/S)investigations,we provide an observation that the topological electronic state,accompanied by an emergent magneto-transport phenomenon,was modulated by applying magnetic field through induced non-collinear magnetism in the magnetic Weyl semimetal EuB6.A giant unconventional anomalous Hall effect(UAHE)is found during the magnetization re-orientation from easy axes to hard ones in magnetic field,with a UAHE peak around the low field of 5 kOe.展开更多
基金Supported by the National Natural Science Foundation of China(Grant No.51722106)the National Key R&D Program of China(Grant No.2019YFA0704904)+1 种基金Users with Excellence Program of Hefei Science Center CAS(Grant No.2019HSC-UE009)Fujian Institute of Innovation,Chinese Academy of Sciences。
文摘The hydrostatic pressure is expected to be an effective knob to tune the magnetostructural phase transitions of hexagonal MM’X alloys(M and M’denote transition metals and X represents main group elements).We perform magnetization measurements under hydrostatic pressure on an MM’X martensitic MnNi0.77Fe0.23Ge alloy.The magnetostructural transition temperature can be efficiently tuned to lower temperatures by applying moderate pressures,with a giant shift rate of-151 K/GPa.A temperature span of 30 K is obtained under the pressure,within which a large magnetic entropy change of-23 J·kg-1K-1 in a field change of 5 T is induced by the mechanical energy gain due to the large volume change.Meanwhile,a decoupling of structural and magnetic transitions is observed at low temperatures when the martensitic transition temperature is lower than the Curie temperature.These results show a multi-parameter tunable caloric effect that benefits the solid-state cooling.
基金National Natural Science Foundation of China,Grant/Award Numbers:21974037,22264007,22104020Natural Science Foundation of Guangxi,Grant/Award Numbers:2021GXNSFFA220003,2022GXNSFDA035072,Guike-AD23026133+2 种基金Guangxi Science and Technology Major Program,Grant/Award Number:Guike-AA24011005Innovation Project of Guangxi Graduate Education,Grant/Award Numbers:YCBZ2023105,YCBZ2024135Guangxi Medical University Training Program for Distinguished Young Scholars。
文摘Solid bubbles have expanded the SERS assay toolbox,but their detection performance in biofluids is still hampered by the irrational design of the plasmonic sensing interface.A plasmonic bubble aggregate-driven DNA-encoded SERS assay is reported here that enables simultaneous,ultrasensitive,and specific detection of multiple miRNAs in blood samples for accurate cancer diagnosis.In this assay,the buoyancy of plasmonic bubbles allows them to self-aggregate at a droplet apex for SERS reconfiguration,form single-layer bubble aggregates with plasmonic nanogaps,and prevent the coffee ring effect during evaporation assembly.Furthermore,DNA-encoded plasmonic bubbles seamlessly couple with dual-color catalytic hybridization assembly to amplify the specific miRNA-responsive Raman signal,and function as both an analyte concentrator and a Raman signal aggregator without external forces.Using these merits,this magnet-free,portable assay achieves femtomolar dual-miRNA quantitation with single-base resolution,simultaneous miRNA detection across four cell lines,and accurate cancer diagnosis(AUC=1)via analyzing 40 blood samples with machine learning,thus providing a promising tool for clinical diagnosis.
基金We thank the National Basic Research Program of China （973 program） （Nos. 2013CB932802 and 2012CB932600）,Alexander von Humboldt Foundation, and the National Natural Science Foundation of China （Nos. 91127037 and 91123037） for financial support.
文摘Uniform silver-containing metal nanostructures with well-defined nanogaps hold great promise for ultrasensitive surface-enhanced Raman scattering （SERS） analyses. Nevertheless, the direct synthesis of such nanostructures with strong and stable SERS signals remains extremely challenging. Here, we report a DNA-mediated approach for the direct synthesis of gold-silver nano-mushrooms with interior nanogaps. The SERS intensities of these nano-mushrooms were critically dependent on the area of the nanogap between the gold head and the silver cap. We found that the formation of nanogaps was finely tunable by controlling the surface density of 6-carboxy-X-rhodamine （ROX） labeled single-stranded DNA （ssDNA） on the gold nanoparticles. We obtained nano-mushrooms in high yield with a high SERS signal enhancement factor of -1.0×109, much higher than that for Au-Ag nanostructures without nanogaps. Measurements for single nano- mushrooms show that these structures have both sensitive and reproducible SERS signals.
基金supported by the National Key R&D Program of China (2020YFA0908104)the National Natural Science Foundation of China (91953106, 92056117, 21904087, 21705159)+1 种基金the Shanghai Municipal Science and Technology Commission (19JC1410300,19ZR1474600, 20dz1101000, 21QA1404800)the Fundamental Research Funds for the Central Universities and Shanghai Jiao Tong University。
文摘Atomically precise gold nanoclusters(Au NCs) are an emerging class of quantum-sized nanomaterials with discrete electronic energy levels, which has led to a range of attractive electronic and optical applications. Nevertheless, the lack of general methods to transfer Au NCs protected with hydrophobic ligands to an aqueous solution hampers their use in physiological settings. Here,we developed a single-stranded DNA-based approach that could transfer ~90% hydrophobic Au NCs into an aqueous solution.We experimentally and theoretically established that multivalent electrostatic and hydrophobic interactions between DNA strands and the hydrophobic ligand layer on Au NCs resulted in monodispersed DNA-coated Au NCs with high physical integrity in an aqueous solution. The fluorescence quantum yield of Au NCs was increased by ~13 fold, and surface-constrained DNA retained the specific recognition ability for biosensing. We further demonstrated the versatility of this phase-transfer approach, which thus holds great potential to advance biological and medical applications of Au NCs.
基金supported by the National Key Research and Development Program of China(Grant Nos.2017YFA0303100,2017YFA0302900,2016YFA0300500,and 2017YFA0206300)the National Natural Science Foundation of China(Grant Nos.11974392,11974394,11822411,51722106,11674372,11774399,11961160699,and 12061130200)+2 种基金the Strategic Priority Research Program(B)of the Chinese Academy of Sciences(CAS)(Grant Nos.XDB07020300,XDB25000000,and XDB33000000)the Beijing Natural Science Foundation(Grant Nos.JQ19002,Z180008,and Z190009)the support from the Youth Innovation Promotion Association of Chinese Academy of Sciences(Grant Nos.2013002,and 2016004)。
文摘Co_(3)Sn_(2)S_(2) is a recently identified magnetic Weyl semimetal in Shandite compounds. Upon cooling, Co_(3)Sn_(2)S_(2) undergoes a ferromagnetic transition with c-axis polarized moments(0.3 μ_(B)/Co) around T_(C)= 175 K, followed by another magnetic anomaly around T_(A)≈ 140 K. A large intrinsic anomalous Hall effect is observed in the magnetic state below TC with a maximum of anomalous Hall angle near T_(A). Here, we report an elastic neutron scattering on the crystalline lattice of Co_(3)Sn_(2)S_(2) in a magnetic field up to 10 T. A strongly anisotropic magnetoelastic response is observed, while only a slight enhancement of the Bragg peaks is observed when B//c. The in-plane magnetic field(B//ab) dramatically suppresses the Bragg peak intensity probably by tilting the moments and lattice toward the external field direction. The in-plane magnetoelastic response commences from T_(C), and as it is further strengthened below T_(A), it becomes nonmonotonic against the field between T_(A) and T_(C) because of the competition from another in-plane magnetic order. These results suggest that a magnetic field can be employed to tune the Co_(3)Sn_(2)S_(2) lattice and its related topological states.
基金supported by the National Natural Science Foundation of China(Grant Nos.52088101,and 11974394)the National Key R&D Program of China(Grant No.2019YFA0704900)+5 种基金the Beijing Natural Science Foundation(Grant No.Z190009)the Strategic Priority Research Program(B)of the Chinese Academy of Sciences(CAS)(Grant No.XDB33000000)the Scientific Instrument Developing Project of CAS(Grant No.ZDKYYQ20210003)Users with Excellence Program of Hefei Science Center,CAS(Grant No.2019HSC-UE009)the Youth Innovation Promotion Association of CAS(Grant No.2013002)supported by the National Science Foundation,United States(Grant No.DMR-1742928)。
文摘Magnetic topological materials, which combine magnetism and topology, are expected to host emerging topological states and exotic quantum phenomena. In this study, with the aid of greatly enhanced coercive fields in high-quality nanoflakes of the magnetic Weyl semimetal Co_(3)Sn_(2)S_(2), we investigate anomalous electronic transport properties that are difficult to reveal in bulk Co_(3)Sn_(2)S_(2) or other magnetic materials. When the magnetization is antiparallel to the applied magnetic field, the low longitudinal resistance state occurs, which is in sharp contrast to the high resistance state for the parallel case. Meanwhile, an exceptional Hall component that can be up to three times larger than conventional anomalous Hall resistivity is also observed for transverse transport. These anomalous transport behaviors can be further understood by considering nonlinear magnetic textures and the chiral magnetic field associated with Weyl fermions, extending the longitudinal and transverse transport physics and providing novel degrees of freedom in the spintronic applications of emerging topological magnets.
基金supported by the National Key Research and Development Program of China(Grant Nos.2017YFA0303100,2017YFA0302900,2016YFA0300500,2017YFA0206300,and 2019YFA0704900)the National Natural Science Foundation of China(Grant Nos.11974392,11974394,11822411,51722106,11674372,11774399,11961160699,and 12061130200)+3 种基金the Strategic Priority Research Program(B)of the Chinese Academy of Sciences(CAS)(Grant Nos.XDB07020300,XDB25000000,and XDB33000000)the Beijing Natural Science Foundation(Grant Nos.JQ19002,Z180008,and Z190009)support from the Youth Innovation Promotion Association of CAS(Grant Nos.2013002,and 2016004)support from the K.C.Wong Education Foundation(GJTD-2018-01)。
文摘We report a comprehensive neutron scattering study on the spin excitations in the magnetic Weyl semimetal Co3Sn2S2 with a quasi-two-dimensional structure.Both in-plane and out-of-plane dispersions of the spin waves were revealed in the ferromagnetic state.Similarly,dispersive but damped spin excitations were found in the paramagnetic state.The effective exchange interactions were estimated using a semi-classical Heisenberg model to consistently reproduce the experimental TCand spin stiffness.However,a full spin wave gap below Eg=2.3 meV was observed at T=4 K.This value was considerably larger than the estimated magnetic anisotropy energy(~0.6 meV),and its temperature dependence indicated a significant contribution from the Weyl fermions.These results suggest that Co3Sn2S2 is a three-dimensional correlated system with a large spin stiffness,and the low-energy spin dynamics can interplay with the topological electron states.
基金National Key R&D Program of China,Grant/Award Number:2016YFA0201200National Natural Science Foundation of China,Grant/Award Numbers:91953106,21904087,21904060,21834007Shanghai Municipal Science andTechnology Commission,Grant/Award Numbers:19Z111030000,19ZR1474600。
文摘Identification and differentiation of various bioanalytes with high spatial and temporal resolution have spawned fluorescent barcode-based detection and imaging.DNA nanostructures with excellent structure programmability,addressability,and nearatomic structure accuracy have emerged as a versatile platform to develop fluorescent barcodes through finely controlled dye numbers,relative distances,and compositions.A variety of DNA fluorescent barcodes with distinguishable spectral colors,geometries and digitized fluorescence intensities have been constructed and favorably implemented in the field of bioimaging,multiplex bioassay,and information security.In this review,we first summarize the state of the art of self-assembled DNA nanostructures.Next,the utilization of DNA nanostructure to develop fluorescent barcodes and the photophysical properties of DNA-templated fluorophores are reviewed.Finally,the applications of DNA fluorescent barcodes for biosensing and imaging,and the challenges and outlook of DNA nanostructure-engineered fluorescent barcodes are discussed.
基金supported by the National Natural Science Foundation of China(21788102,21904087,51620105009)the National Program for Support of Top-Notch Young Professionals+5 种基金the Natural Science Foundation of Guangdong Province(2016A030312002,2018A030313337)Science and Technology Commission of Shanghai Municipality(19ZR1474600)the Fundamental Research Funds for the Central Universities(2015ZY013)the Innovation and Technology Commission of Hong Kong(ITC-CNERC14S01)Cross Multi-Disciplinary Translational Seed Fund(SJTU,ZH2018ZDA33)Joint Research Initiative Program SJTU 2018,and SJTU Research(2019).
文摘Colorectal cancer(CRC)is still a major killer,mainly due to the lack of early detection biomarker with sensitivity/specificity.Conventional histopathology is the gold standard approach in practice,but there are still some issues(false diagnosis and long waiting period).Aggregation-induced emission(AIE)is a novel photophysical phenomenon which has been widely utilized for biological imaging in vitro,including malignant cells,showing remarkable imaging contrast and enhanced emission in high concentrated state.However,it is unclear if AIE dyes can identify malignant cells specifically in vivo.A great challenge for specific labeling of malignant cells is probably ascribed to the complex compositions in tumor tissues.Herein,an AIE dye-based mitochondria-targeted histological staining strategy was employed to localize cancer and the metastatic track in the fresh colorectal cancer.This novel approach holds great potential to revolutionize the clinical diagnosis and intervention for devastating malignancy.
基金supported by the National Key R&D Program of China(nos.2022YFA1403800,2022YFA1403400,2019YFA0704900)the Fundamental Science Center of the National Natural Science Foundation of China(no.52088101)+7 种基金the Synergetic Extreme Condition User Facility(SECUF)the Beijing Natural Science Foundation(no.Z190009)the National Natural Science Foundation of China(nos.11974394,12174426,12104280,and 12004416)the Strategic Priority Research Program(B)of the Chinese Academy of Sciences(CAS)(XDB33000000)the Key Research Program of CAS(no.ZDRW-CN-2021-3)the CAS Project for Young Scientists in Basic Research(YSBR-003)the Scientific Instrument Developing Project of CAS(no.ZDKYYQ20210003)the Basic Research Plan of Shanxi Province(no.20210302124160).
文摘The modulation of topological electronic state by an external magnetic field is highly desired for condensed-matter physics.Schemes to achieve this have been proposed theoretically,but few can be realized experimentally.Here,combining transverse transport,theoretical calculations,and scanning tunneling microscopy/spectroscopy(STM/S)investigations,we provide an observation that the topological electronic state,accompanied by an emergent magneto-transport phenomenon,was modulated by applying magnetic field through induced non-collinear magnetism in the magnetic Weyl semimetal EuB6.A giant unconventional anomalous Hall effect(UAHE)is found during the magnetization re-orientation from easy axes to hard ones in magnetic field,with a UAHE peak around the low field of 5 kOe.
