A ferromagnetic resonance study on ultra-thin Fe3O4 layers grown on (0 0 1)MgO
A ferromagnetic resonance study on ultra-thin Fe3O4 layers grown on (0 0 1)MgO
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DOI：
10.1016/s0304-8853(97)01017-2
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发表时间：
1998-02
影响因子：
2.7
通讯作者：
van der Paa Paul Heijden;van Mg Opstal;Chw Coenraad Swüste;Pjh Pascal Bloemen;J. Gaines;De Jonge
中科院分区：
文献类型：
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作者：
van der Paa Paul Heijden;van Mg Opstal;Chw Coenraad Swüste;Pjh Pascal Bloemen;J. Gaines;De Jonge
利用分子束外延技术在（0 0 1）MgO衬底上生长了厚度为1.5-115 nm的Fe 3 O 4薄膜，并对其进行了铁磁共振实验.对于大的层厚度，磁各向异性的大小以及温度依赖性类似于散装Fe 3 O 4的行为。在室温下，磁各向异性随着Fe 3 O 4层厚度的减小而减小，并且在5 nm以下消失。低温铁磁共振实验表明，一个明确的Verwey转变，特征Fe 3 O 4，上述层厚度为5 nm和异常的各向异性行为在50 K低于10 nm。
Ferromagnetic resonance experiments have been performed on Fe3O4layers with thicknesses in the range of 1.5–115 nm, which have been grown by molecular beam epitaxy on (0 0 1)MgO substrates. For large layer thicknesses, the magnitude as well as the temperature dependence of the magnetic anisotropy resemble the bulk Fe3O4behavior. At room temperature, the magnetic anisotropy decreases with decreasing Fe3O4-layer thickness and vanishes below 5 nm. Low-temperature FMR experiments show a clear Verwey transition, characteristic for Fe3O4, above layer thicknesses of 5 nm and an anomalous anisotropy behavior at 50 K below 10 nm.