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Thickness dependent magnetic properties of ferromagnetic films (Fe, Co) interfaced with Ta

机译：铁磁膜的厚度依赖性磁性（Fe，Co）与Ta接口

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摘要

In the present work, magnetic properties of ferromagnetic films viz. Co and Fe interfaced with Ta have been studied using magneto-optical Kerr effect (MOKE), X-ray reflectivity (XRR) and soft X-ray absorption spectroscopy (SXAS) on wedge shaped samples. Thickness of ferromagnetic film at different points of wedge sample as determined from XRR were employed to study the evolution of magnetic properties with increasing film thickness using MOKE measurements. Co film exhibits a uniaxial magnetic anisotropy on Ta which varies as a function of increasing film thickness, while no thickness dependent magnetic anisotropy has been observed for Fe film grown on Ta. The variation of coercivity with increasing film thickness is in agreement with the observed variation of magnetic anisotropy. SXAS measurements qualitatively support alloying / intermixing at interface. Thicknesses of interfacial magnetic dead layer as seen from variation of Kerr intensity with film thickness is relatively higher for Co as compared to Fe, while interfaced with Ta.
机译：在本作工作中，铁磁膜的磁性特性。使用磁光克尔效应（MOKE），X射线反射率（XRR）和软X射线吸收光谱（SXAS）在楔形样品上研究了与TA接口的CO和Fe。采用由XRR测定的楔形样品不同点的铁磁膜的厚度研究磁性的磁性的演变，使用静摩擦测量的增加膜厚度。 CO膜在TA上表现出单轴磁各向异性，其随着薄膜厚度的函数而变化，而在TA上生长的Fe膜没有观察到厚度依赖性磁各向异性。随着薄膜厚度的增加，矫顽力的变化与观察到的磁各向异性的变化一致。 SXAS测量定性地支持接口的合金/混合。与Fe相比，从薄膜厚度与膜厚度的克尔强度的变化相比，与Fe相比，与Fe相比相对较高的界面磁死层的厚度相对较高。

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