Strong Coupling of Magnetism and Lattice Induces Near-Zero Thermal Expansion over Broad Temperature Windows in ErFe10V2−xMox Compounds

作     者：Wenjie Li Kun Lin Yili Cao Chengyi Yu Chin-Wei Wang Xinzhi Liu Kenichi Kato Yilin Wang Jiaou Wang Qiang Li Jun Chen Jinxia Deng Hongjie Zhang Xianran Xing 

作者机构：Beijing Advanced Innovation Center for Materials Genome Engineering and Institute of Solid State ChemistryUniversity of Science and Technology BeijingBeijing 100083 Neutron GroupNational Synchrotron Radiation Research CenterHsinchu 30076 School of PhysicsSun Yat-Sen UniversityGuangzhou 510275 RIKEN SPring-8 CenterHyogo 679-5148 Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049 State Key Laboratory of Rare Earth Resource UtilizationChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022 

出 版 物：《CCS Chemistry》 (中国化学会会刊（英文）)

年 卷 期：2021年第3卷第3期

页      面：1009-1015页

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China(21701008,21231001,21590793,and 21731001) National Postdoctoral Program for Innovative Talents(BX201700027) the Fundamental Research Funds for the Central Universities,China(FRF-IDRY-19-018) 

主　　题：zero thermal expansion intermetallic compound magnetic structure neutron diffraction 

摘      要：Alloys with low thermal expansion could overcome thermal stress issues under temperature-fluctuated conditions and possess important application prospects,while they are restricted to finite chemical components and temperature *** this study,we report a novel class of near-zero thermal expansion(near ZTE)alloys,ErFe_(10)V_(2−x)Mo_(x),over a wide temperature range(120–440 K).Neutron diffraction and magnetic measurements demonstrated that the ErFe_(10)V_(2−x)Mo_(x)compounds exhibited complex ferrimagnetic(FIM)structures below Curie temperature(TC).The near-ZTE behaviors were closely related to the itinerant Fe 3d moments in the collinear FIM states,as well as the geometric[−Fe−Fe−]***,X-ray absorption near-edge structure(XANES)spectra revealed that the nonmagnetic substitution changed the electronic valence states of Fe atoms,which,in turn,changed Fe 3d moments and TC,hence,regulating the thermal expansion *** work provides an insight into chemical modifications of thermal expansion in magnetic intermetallic compounds.