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

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 

机构地区：[1]Herbert Gleiter Institute of Nanoscience,School of Materials Science and Engineering,Nanjing University of Science and Technology,Nanjing 210094,China [2]Department of Physics,City University of Hong Kong,Hong Kong SAR,China [3]City University of Hong Kong(Dongguan),Dongguan 523000,China [4]Japan Proton Accelerator Research Complex,Japan Atomic Energy Agency,Tokai,Japan [5]Spallation Neutron Source Science Center,Dongguan 523803,China [6]Guangdong-Hong Kong-Macao Joint Laboratory for Neutron Scattering Science and Technology,Dalang,Dongguan 523803,China [7]Shanghai Synchrotron Radiation Facility,Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201204,China [8]Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China [9]Center for Neutron Scattering,City University of Hong Kong Shenzhen Research Institute,Shenzhen 518057,China

出　　处：《Journal of Materials Science & Technology》2024年第9期224-235,共12页材料科学技术（英文版）

基　　金：financially supported by the National Key R&D Program of China(No.2021YFB3802800);the Natural Science Foundation of Jiangsu Province(No.BK20200019);the National Natural Science Foundation of China(Nos.52222104,12261160364,51871120,and 51520105001);support from the Guangdong-Hong Kong-Macao Joint Laboratory for Neutron Scattering Science and Technology;support of the Shenzhen Science and Technology Innovation Committee(No.JCYJ20170413140446951);partial support by the Research Grants Council of the Hong Kong Special Administrative Region,Project N_CityU173/22;support of the National Natural Science Foundation of China(No.12275154);the Guangdong Basic and Applied Basic Research Foundation(No.2021B1515140028);supported by the US DOE Office of Science,Office of Basic Energy Sciences.

摘　　要：Fe-based metallic glasses are promising functional materials for advanced magnetism and sensor fields.Tailoring magnetic performance in amorphous materials requires a thorough knowledge of the correlation between structural disorder and magnetic order,which remains ambiguous.Two practical difficulties remain:the first is directly observing subtle magnetic structural changes on multiple scales,and the second is precisely regulating the various amorphous states.Here we propose a novel approach to tailor the amorphous structure through the liquid-liquid phase transition.In-situ synchrotron diffraction has unraveled a medium-range ordering process dominated by edge-sharing cluster connectivity during the liquid-liquid phase transition.Moreover,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 profiles.The 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 magnetization.Furthermore,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 effect.These 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 

分 类 号：TG14[一般工业技术—材料科学与工程]