Compositional dependence of magnetic anisotropy in chemically synthesized Co3−xFexO4 (0 ≤ x ≤ 2)
Compositional dependence of magnetic anisotropy in chemically synthesized Co3−xFexO4 (0 ≤ x ≤ 2)
复制标题
化学合成的 Co3−xFexO4 (0 ≤ x ≤ 2) 中磁各向异性的成分依赖性
DOI：
10.7567/jjap.57.01af02
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发表时间：
2017
影响因子：
1.5
通讯作者：
M. Shima
中科院分区：
文献类型：
--
作者：
Kensuke Hayashi;Keisuke Yamada;M. Shima
研究了用溶胶凝胶法制备的Co3−xFexO4(CfO，0≤x≤2)薄膜和粉末样品的磁各向异性随Fe组分x的变化.X射线衍射仪的结构分析表明，当x<；2时，CFO粉末样品出现与尖晶石结构有关的衍射峰，而厚度为130-510 nm的CFO薄膜样品在0≤x≤2时出现衍射峰.当≤x≤为1.3时，CFO薄膜样品具有高度的(111)择优取向，Lotgering因子大于0.9.从CFO粉末样品的室温磁滞回线估算出的磁各向异性常数K1在x=0.9时最小。当x=1.3时，CFO薄膜样品具有较大的面内磁各向异性(Kef=5.7×105erg/cm3)。随着x的增加，当x=0.9时，尖晶石CFO的磁易轴从<111>变为<100>。
Magnetic anisotropy of Co3−xFexO4 (CFO, 0 ≤ x ≤ 2) thin-film and powder samples prepared by a sol–gel method has been investigated as a function of Fe composition x. Structural analyses by X-ray diffraction show that CFO powder samples exhibit diffraction peaks associated with the spinel structure when x < 2, while CFO thin-film samples with thickness of 130–510 nm yield the peaks when 0 ≤ x ≤ 2. CFO thin-film samples are highly (111)-oriented with the Lotgering factor greater than 0.9 when 0.6 ≤ x ≤ 1.3. The magnetic anisotropy constant K1 of CFO powder samples estimated from their room-temperature hysteresis loops yields a minimum when x = 0.9. Relatively large in-plane magnetic anisotropy (Keff = 5.7 × 105 erg/cm3) is observed for the CFO thin-film sample when x = 1.3. With increasing x, the magnetic easy axis of the spinel CFO changes from 〈111〉 to 〈100〉 when x = 0.9.