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Evolution of medium-range order and its correlation with magnetic nanodomains in Fe-Dy-B-Nb bulk metallic glasses

Journal of Materials Science & Technology 2024年第9期176卷 224-235页

作者： Jiacheng Ge Yao Gu Zhongzheng Yao Sinan Liu Huiqiang Ying Chenyu Lu Zhenduo Wu Yang Ren Jun-ichi Suzuki Zhenhua Xie Yubin Ke Jianrong Zeng He Zhu Song Tang Xun-Li Wang Si Lan Herbert Gleiter Institute of Nanoscience School of Materials Science and EngineeringNanjing University of Science and TechnologyNanjing 210094China Department of Physics City University of Hong KongHong Kong SARChina City University of Hong Kong(Dongguan) Dongguan 523000China Japan Proton Accelerator Research Complex Japan Atomic Energy AgencyTokaiJapan Spallation Neutron Source Science Center Dongguan 523803China Guangdong-Hong Kong-Macao Joint Laboratory for Neutron Scattering Science and Technology DalangDongguan 523803China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China Center for Neutron Scattering City University of Hong Kong Shenzhen Research InstituteShenzhen 518057China

Fe-based metallic glasses are promising functional materials for advanced magnetism and sensor *** magnetic performance in amorphous materials requires a thorough knowledge of the correlation between structural disorder and magnetic order,which remains *** practical difficulties remain:the first is directly observing subtle magnetic structural changes on multiple scales,and the second is precisely regulating the various amorphous *** we propose a novel approach to tailor the amorphous structure through the liquid-liquid phase ***-situ synchrotron diffraction has unraveled a medium-range ordering process dominated by edge-sharing cluster connectivity during the liquid-liquid phase ***,nanodomains with topological order have been found to exist in composition with liquid-liquid phase transition,manifesting as hexagonal patterns in small-angle neutron scattering *** liquid-liquid phase transition can induce the nanodomains to be more locally ordered,generating stronger exchange interactions due to the reduced Fe–Fe bond length and the enhanced structural order,leading to the increment of saturation ***,the increased local heterogeneity at the medium-range scale enhances the magnetic anisotropy,promoting the permeability response under applied stress and leading to a better stress-impedance *** experimental results pave the way to tailor the magnetic structure and performance through the liquid-liquid phase transition.

关键词： Fe-based metallic glass Liquid-liquid phase transition Medium-range ordering magnetic nanodomain

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