Anisotropy energy of Y sub 2 Fe sub 14 B, Y sub 2 Co sub 14 B, Y sub 2 Fe sub 14 minus x Co sub x B, and La sub 2 Co sub 14 B

Journal Article · Mon Apr 15 00:00:00 EDT 1991 · Journal of Applied Physics; (USA)

DOI:https://doi.org/10.1063/1.348289· OSTI ID:5810206

Ukai, T; Yamaki, K; Takahashi, H; Mori, N ^[1]

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1. Department of Electronics, Shibaura Institute of Technology, 3-9-14, Shibaura, Minato-ku, Tokyo 108, Japan (JP)

The anisotropy energies of Y{sub 2}Fe{sub 14}B, Y{sub 2}Co{sub 14}B, Y{sub 2}Fe{sub 14{minus}{ital x}}Co{sub {ital x}}B, and La{sub 2}Co{sub 14}B are discussed with reference to the band model. The energy bands exclusive and inclusive of the {ital p} bands in B are formulated in consideration of the spin-orbit interaction and exchange splitting. The anisotropy constant {ital K}{sub 1} is estimated through the difference between the calculated electronic energies with the magnetization parallel to (001) and (100). In Y{sub 2}Fe{sub 14}B, the calculated {ital K}{sub 1} is much the same as the experimental result, and in Y{sub 2}Co{sub 14}B, it agrees with the experimental result. In Y{sub 2}Fe{sub 14{minus}{ital x}}Co{sub {ital x}}B, the calculated {ital K}{sub 1} inclusive of the {ital p} bands in B is much the same as the experimental result. Finally, the anisotropy energy of La{sub 2}Co{sub 14}B is discussed by taking into account the 4{ital f} bands just above the Fermi level.

• OSTI ID: 5810206
• Journal Information: Journal of Applied Physics; (USA), Vol. 69:8; ISSN 0021-8979
• Country of Publication: United States
• Language: English

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