Structural and magnetic properties of epitaxial CrO2 thin films grown on TiO2 (001) substrates
Structural and magnetic properties of epitaxial CrO2 thin films grown on TiO2 (001) substrates
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DOI：
10.1063/1.4802957
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发表时间：
2013-04-22
影响因子：
4
通讯作者：
Gupta, Arunava
中科院分区：
文献类型：
--
作者：
Zhang, Xueyu;Zhong, Xing;Gupta, Arunava
研究了用常压化学气相沉积法在（001）取向的TiO 2衬底上外延生长CrO 2薄膜的结构和磁性。由于退磁和相对较弱的垂直磁晶各向异性之间的竞争，沉积的CrO 2（001）薄膜表现出与在TiO 2衬底上生长的CrO 2（100）和CrO 2（110）薄膜显著不同的磁性。基于M-H曲线的厚度依赖性，表面各向异性被证实存在，可能源于薄膜中的应变。面外磁滞曲线可以很好地描述的有效各向异性的分布，这可能是由于一个变化的局部退磁场和跨膜的应变分布。对于面内磁化，磁滞曲线是一致的条纹或涡旋域结构的几乎封闭的磁通配置在剩磁。(C)2013 AIP Publishing LLC. [http：//dx.doi.org/10.1063/1.4802957]
The structural and magnetic properties of epitaxial CrO2 thin films grown on (001)-oriented TiO2 substrates by atmospheric pressure chemical vapor deposition are investigated. Due to the competition between demagnetization and a relatively weak perpendicular magnetocrystalline anisotropy, the deposited CrO2 (001) films exhibit magnetic properties that are significantly different from CrO2 (100) and CrO2 (110) films grown on TiO2 substrates. Based on the thickness dependence of M-H curves, a surface anisotropy is confirmed to exist, likely originating from strain in the film. The out-of-plane hysteresis curves can be well described by a distribution of effective anisotropy that may be due to a varying local demagnetizing field and a distribution of strain across the film. For the in-plane magnetization, the hysteresis curves are consistent with stripe or vortex domain structures of an almost closed flux configuration at remanence. (C) 2013 AIP Publishing LLC. [http://dx.doi.org/10.1063/1.4802957]