Ferromagnetic Resonance in Garnet Y_3Fe_<5x>Co_<x/2>Ge_<x/2>O_<12>
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概要
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The substitution of a small amount of Co^<2+> and Ge^<4+> for Fe^<3+> in yttrium iron garnet causes remarkable changes of the magnetic anisotropy constants and ΔH. The magnetic anisotropy constants K_1 and K_2 of Y_3Fe_<5x>Co_<x/2>Ge_<x/2>O_<12> depend strongly on temperature, and K_1 is linear to the concentration of cobalt at a given temperature, where x=0, 0.0042, 0.017, 0.048. The effect of cobalt substitution is similar to the case of magnetite containing cobalt, and can be accounted for by Slonczewski's theory with the value of the parameter |aλ|=100 cm^<-1>. The line width ΔH increases with the increase in cobalt concentration.
- 社団法人日本物理学会の論文
- 1963-07-05
著者
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Iida Shuichi
Department Of Physics Faculty Of Science The University Of Tokyo
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Sekizawa Hisashi
The Institute Of Physic And Chemical Research
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OKADA TAKASHI
Fundamental Research Laboratory, Nippon Electric Company
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Okada Takashi
Fundamental Research Laboratory Nippon Electric Company
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Iida Shuichi
Department Of Physics Faculity Of Science University Of Tokyo
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Okada T.
Fundamental Research Laboratory, Nippon Electric Company
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Iida Shuichi
Department of Applied Physics, Tokyo Institute of Technology
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