Magnetic anisotropy of Y-type ferrites: Role of the local lattice structure
Magnetic anisotropy of Y-type ferrites: Role of the local lattice structure
复制标题
Y型铁氧体的磁各向异性:局部晶格结构的作用
DOI:
10.1088/1361-6463/aba3ea
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Yanagihara Hideto
中科院分区:
文献类型:
--
作者:
Inoue Jun-ichiro;Koizumi Hiroki;Nakamura Hiroyuki;Yanagihara Hideto
We study magnetic anisotropy (MA) of the Y-type ferrites using an electron theory at 0 K that was previously applied to M-type and spinel ferrites. In our calculation, we consider the local lattice structure around M 2+ ions in the ferrites (M 2 Y ferrites), where M represents Fe, Co, Ni and Cu. The calculated MA energy, difference between magnetic energies of states with magnetisation M s parallel and perpendicular to c-axis of the hexagonal lattice, is compared with the experimental values by identifying possible occupation sites of M 2+. The calculated MA energies of Co 2 Y and Ni 2 Y are− 0.33 and− 0.39 MJ m− 3, respectively. The negative sign indicates that M s is within the c-plane of the lattice. We have analyzed in detail how the local lattice structure around M 2+ affects the MA of the M 2 Y ferrites. The c-plane MA constant K 3 of Co 2 Y is also calculated and compared with the experimental value. In addition, the MAs of Mg 2 Y and Zn 2 Y are examined. The findings of this study may contribute to design Y-type ferrites which are applicable to hyper-frequency regime.
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