La-Zn substituted hexagonal Sr ferrite thin films for high density magnetic recording

被引:27
作者
Liu, XX [1 ]
Bai, JM
Wei, FL
Xu, H
Yang, Z
Piramanayagam, SN
Takei, S
Morisako, A
Matsumoto, M
机构
[1] Lanzhou Univ, Res Inst Magnetism & Magnet Mat, Lanzhou 730000, Peoples R China
[2] Shinshu Univ, Dept Informat Engn, Nagano 3808553, Japan
[3] State Educ Commiss, Key Lab Magnet, Lanzhou 730000, Peoples R China
关键词
D O I
10.1063/1.372210
中图分类号
O59 [应用物理学];
学科分类号
摘要
La-Zn substituted M type Sr-ferrite thin films were prepared by conventional rf diode sputtering. The crystallography, surface morphology, magnetic properties, and their temperature dependence were investigated by x-ray diffractometry, atomic force microscopy, and vibrating sample magnetometry. La-Zn substitution reduces the grain growth rate, so that it was possible to obtain fine grains with mean grain size about 12 nmx12 nm. Suitable amount of La-Zn substitution increases the saturation magnetization M-s of the films without changing the magnetocrystalline anisotropy of the material. As a result, the coercivity H-c increases with the increase of the La-Zn substitution. La-Zn substitution also reduces the values of dH(c)/dT of the films in the vicinity of room temperature. (C) 2000 American Institute of Physics. [S0021-8979(00)05905-3].
引用
收藏
页码:2503 / 2506
页数:4
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