Intrinsic magnetic properties and domain structure of ThMn12-type (Sm, Zr)(Fe, Co, M)12 (M <b>=</b> Ti, Mo) compounds
Abstract
The structure, intrinsic magnetic properties, and domain structure of Sm0.7Zr0.3(Fe0.75Co0.25)11.5M0.5 (M = Ti, Mo) compounds were systematically investigated using neutron diffraction, magnetic measurements, magneto-optical Kerr effect, and first-principles calculations. The results demonstrate that the ThMn12-type structure is co-stabilized by substituting Zr for Sm at the 2a site and M for Fe at the 8i site. The effect of M substitution on the electronic band structure can be explained by the rigid band model, where the d–d electron-orbital hybridization between M and Fe leads to a negative effect on the Fe local magnetic moment. Besides, M changes the magnetic anisotropy by altering the electronic density surrounding Sm. Both the compounds exhibit higher Curie temperatures and magnetocrystalline anisotropy fields compared to the well-known Nd2Fe14B magnet, with Tc and μ0Ha reaching 819.3 K and 9.23 T for M = Ti, and 820.0 K and 8.41 T for M = Mo, respectively. The relevant magnetic domain parameters also indicate that these compounds have significant potential for the development of permanent magnet materials.
Article Details
Journal Info
Applied Physics Letters
American Institute of Physics
Authors (12)
Shaohua Fan
School of Materials Science and Engineering of Shanxi Normal University & Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education
Zhongchong Lin
Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, College of Physics and Energy
Baochun Wu
State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics
Hui-Dong Qian
Institute of Condensed Matter and Material Physics, School of Physics, Peking University 1 , Beijing 100871,
Xiaobai Ma
Department of Nuclear Physics
Wenyun Yang
Institute of Condensed Matter and Material Physics, School of Physics
Xiaoxiao Fang
Institute of Condensed Matter and Material Physics, School of Physics, Peking University 1 , Beijing 100871,
Qing Xu
Jingzhi Han
Institute of Condensed Matter and Material Physics, School of Physics, Peking University 1 , Beijing 100871,
Honglin Du
College of Chemistry and Molecular Engineering, Beijing National Laboratory for Molecular Sciences
Jinbo Yang
Institute of Condensed Matter and Material Physics, School of Physics
Yingchang Yang
Institute of Condensed Matter and Material Physics, School of Physics