...
首页> 外文期刊>Physical review >Temperature dependence of magnetic properties of La_(0.7)Sr_(0.3)MnO_3/SrTiO_3 thin films on silicon substrates
【24h】

Temperature dependence of magnetic properties of La_(0.7)Sr_(0.3)MnO_3/SrTiO_3 thin films on silicon substrates

机译:硅衬底上La_(0.7)Sr_(0.3)MnO_3 / SrTiO_3薄膜的磁性与温度的关系

获取原文
获取原文并翻译 | 示例
           

摘要

20-nm-thick and 50-nm-thick La_(0.7)Sr_(0.3)MnO_3 films were grown by molecular-beam epitaxy on Si (001) substrates overlaid by a 20-nm-thick SrTiO_3 (001) buffer layer. X-ray diffraction and atomic force microscopy studies demonstrate their epitaxial (001) orientation. Their static magnetic properties are investigated as a function of the temperature using a superconducting quantum interference device. Ferromagnetic resonance (FMR) inside a cavity and microstrip ferromagnetic resonance (MS-FMR) are used to study their dynamic properties. The field dependence of the MS-FMR resonance frequency as a function of a perpendicular applied field provides a precise evaluation of the g factor and of the effective demagnetizing field AπM_(eff) at room temperature. The perpendicular uniaxial and the in-plane anisotropies strongly decrease versus temperature. The excellent epitaxial crystallographic orientation due to the SrTiO_3 buffer gives rise to an observed fourfold symmetry of the in-plane anisotropy which is assumed of magnetocrystalline nature. The large perpendicular uniaxial anisotropy gives rise to an effective demagnetizing field significantly larger than the resulting one from the sole contribution of the saturation magnetization. It is most probably induced by the interfacial strain.
机译:通过分子束外延在厚度20 nm的SrTiO_3(001)缓冲层覆盖的Si(001)衬底上生长20 nm和50 nm厚的La_(0.7)Sr_(0.3)MnO_3膜。 X射线衍射和原子力显微镜研究表明其外延(001)方向。使用超导量子干涉装置研究了它们的静态磁性能随温度的变化。腔内的铁磁共振(FMR)和微带铁磁共振(MS-FMR)用于研究其动态特性。 MS-FMR共振频率的场依赖性作为垂直施加场的函数,可在室温下精确评估g因子和有效退磁场AπM_(eff)。垂直单轴各向异性和面内各向异性随温度而大大降低。由于SrTiO_3缓冲液而产生的优异的外延晶体学取向导致观察到的平面内各向异性的四重对称性,该对称性被假定为具有磁晶性质。大的垂直单轴各向异性会产生一个有效的退磁磁场,该磁场明显大于由饱和磁化强度单独产生的磁场。它很可能是由界面应变引起的。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号