FMR study of strain-induced magnetic anisotropies in CrO2 thin films
FMR study of strain-induced magnetic anisotropies in CrO2 thin films
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CrO2 薄膜中应变诱导磁各向异性的 FMR 研究
DOI：
10.1002/pssa.200405521
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
B. Aktaş
中科院分区：
文献类型：
--
作者：
B. Rameev;Arunava Gupta;G. Miao;G. Xiao;F. Yildiz;L. Tagirov;B. Aktaş
采用化学气相沉积（CVD）方法，在二氧化钛（tio2）单晶衬底上生长了二氧化钛（cro3）固体前驱体外延薄膜。采用铁磁共振（FMR）技术对不同厚度（27 ~ 530 nm）的薄膜进行了研究。在预蚀刻二氧化钛衬底上沉积的一系列二氧化钛薄膜中，观察到FMR信号与薄膜厚度有很强的依赖性。结果表明，CrO 2薄膜的磁性行为是由磁晶和应变各向异性之间的竞争引起的，磁晶和应变各向异性分别有利于[001]和[010]磁化方向。对于最薄的薄膜，应变各向异性占主导地位，磁易轴从[001]转向[010]方向。相反，生长在未蚀刻衬底上的CrO 2薄膜表现出基本的无应变磁各向异性行为。
Epitaxial CrO 2 thin films were grown on TiO 2 (100) single-crystalline substrates by chemical vapour deposition (CVD) process with use of CrO 3 solid precursor. The films with different thickness (27-530 nm) were studied by Ferromagnetic Resonance (FMR) technique. Strong dependence of FMR signal on the film thickness was observed in the series of CrO 2 films deposited onto the pre-etched TiO 2 substrates. It is shown that the magnetic behaviour of the CrO 2 films arises from competition between magnetocrystalline and strain anisotropies that favour the [001] and [010] magnetization directions, respectively. For the thinnest film the strain anisotropy dominates, and the magnetic easy axis switches from [001] to the [010] direction. On the contrary, the CrO 2 film grown on the unetched substrate demonstrates essentially strain-free magnetic anisotropy behaviour.