Presentation Information
[O9-1]Novel High Frequency Magnetic Properties of Rare Earth-Transitional Metal Intermetallic Compounds
*Jinbo Yang1, Wenyun Yang1, changsheng wang1, Fashen Li2 (1. Peking University (China), 2. Lanzhou University (China))
Keywords:
Rare Earth-Transitional Metal Intermetallic Compounds,Magnetocrystalline anisotropy,high frequency,soft magnetic materials,nitrides
Magnetocrystalline anisotropy, as one of the core foundations and applications of modern magnetic materials, determines the performance and use of most magnetic materials. For many years, the search for rare earth permanent magnet materials with strong uniaxial anisotropy has been the mainstream direction of research on rare earth-transition metal intermetallic compounds. However, there has been less attention paid to rare earth-transition metal intermetallic compounds with complex conical anisotropy or planar anisotropy. In particular, most rare earth-transition metal intermetallic compounds mainly exhibit easy-plane or easy-cone anisotropy, including hundreds of compounds, and their interstitial compounds can derive more systems. This provides a vast material library for emerging high-frequency magnetic materials and topological electronic materials, laying the foundation for obtaining high-performance magnetic material applications. This talk reports our recent work on using various element substitutions and interstitial atom effects to change the saturation magnetization, Curie temperature, and magnetocrystalline anisotropy of rare earth-transition materials, thereby achieving the design and application from permanent magnet materials to soft magnetic materials. In particular, for R2Fe17N3 (R=Y, Ce, Pr, Nd etc.) materials, changing the ratio of the axial anisotropy field Hθ to the in-plane anisotropy field Hφ is expected to significantly increase its Snoek’s limit. Further research and technological development could make it a new generation of high-efficiency electromagnetic wave absorption and soft magnetic materials, opening up new directions for the research and application of rare earth-transition metal intermetallic compounds.