3d–4f-Intermetallides. Exchange and Anisotropy. Many-Electron Statistics
作者: O. I. Mitsek, V. M. Pushkar
作者单位: 1G.V. Kurdyumov Institute for Metal Physics, NAS of Ukraine, 36 Academician Vernadsky Blvd., UA-03680 Kyiv-142, Ukraine
刊名: Metallofiz. Noveishie Tekhnol., 2017, Vol.39 (4), pp.425-439
来源数据库: G.V. Kurdyumov Institute for Metal Physics, National Academy of Science of the Ukraine
DOI: 10.15407/mfint.39.04.0425
关键词: REI–Fe intermetallidesmany-electron operator spinorstheory of direct covalent ferromagnetic and indirect band-covalent antiferromagnetic exchangeuniaxial deformationferromagnetic anisotropy.
原始语种摘要: Magnetic properties of the 3$d$(Fe)–4$f$(RE) intermetallides are calculated by introduction of both the many-electron operator spinors (MEOS) and the chemical-bonds’ fluctuations as MEOS Fourier images. Dependences of both the critical temperature $T_{\textrm{c}}$ and the compensation temperature $T_k$ on the rare-earth ion (REI) spin $S_f$($T$) are obtained. They agree with data for Fe$_2$RE and Fe$_3$RE. Axial symmetry of Nd$_2$Fe$_{14}$B is connected with orbital moment $L_r$ of the B$^5$ ion with inhomogeneous (covalent) B–Fe bond. Direct Fe–Fe exchange explains the dependence $T_{\textrm{c0}} \cong T_{\textrm{c}}$(Fe)$x^2_D$ on the concentration $x_D$ of Fe ions. Additional term ${\delta}T_{\textrm{c}} \propto S^2_f$ for Fe$_2$RE ferromagnets is given by direct Fe–RE exchange, and...
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  • 道具 已知的
  • introduction 导言
  • chemical 化学的
  • given 已知的
  • properties 已知的
  • temperature 温度
  • exchange 交换
  • inflection 弯曲
  • ferrimagnet 铁磁体
  • operator 话务员
  • moment