Spin-orbit interaction enhancement in permalloy thin films by Pt doping
Spin-orbit interaction enhancement in permalloy thin films by Pt doping
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DOI：
10.1103/physrevb.93.014432
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发表时间：
2016-01
影响因子：
3.7
通讯作者：
A. Hrabec;F. Goncalves;C. S. Spencer;E. Arenholz;A. N’Diaye;R. Stamps;C. Marrows
中科院分区：
文献类型：
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作者：
A. Hrabec;F. Goncalves;C. S. Spencer;E. Arenholz;A. N’Diaye;R. Stamps;C. Marrows
作者：Hrabec，A; Goncalves，FJT; Spencer，CS; Arenholz，E; N'Diaye，AT; Stamps，RL; Marrows，CH|摘要：© 2016美国物理学会。英国.自旋-轨道相互作用是磁性的一个固有部分，它将独立的自旋世界与原子晶格联系起来，从而控制磁性材料的许多功能特性。在广泛应用的三维过渡金属铁磁薄膜中，由于原子序数较低，自旋轨道相互作用相对较弱。在这里，我们表明，它是可能的，以提高和调整的自旋轨道相互作用，通过添加5d铂掺杂到坡莫合金（Ni 81 Fe 19）薄膜的共溅射技术。这是实现没有显着的变化的磁性能，由于附近的Pt，以满足斯通纳标准的铁磁状态。自旋-轨道相互作用的研究是通过运输测量（各向异性磁阻和异常霍尔效应），铁磁共振测量，以确定吉尔伯特阻尼，以及通过测量的X射线磁圆二色性在L3和L2的X射线吸收边，以揭示轨道自旋磁矩的比例。结果表明，有效的自旋-轨道相互作用的增加与Pt浓度在0%-10%的Pt浓度范围内的方式是一致的理论预期的所有四个测量。
Author(s): Hrabec, A; Goncalves, FJT; Spencer, CS; Arenholz, E; N'Diaye, AT; Stamps, RL; Marrows, CH | Abstract: © 2016 American Physical Society. UK. The spin-orbit interaction is an inherent part of magnetism, which links up the independent world of spins to the atomic lattice, thus controlling many functional properties of magnetic materials. In the widely used 3d transition metal ferromagnetic films, the spin-orbit interaction is relatively weak, due to low atomic number. Here we show that it is possible to enhance and tune the spin-orbit interaction by adding 5d platinum dopants into permalloy (Ni81Fe19) thin films by a cosputtering technique. This is achieved without significant changes of the magnetic properties, due to the vicinity of Pt to meeting the Stoner criterion for the ferromagnetic state. The spin-orbit interaction is investigated by means of transport measurements (the anisotropic magnetoresistance and anomalous Hall effect), ferromagnetic resonance measurements to determine the Gilbert damping, as well as by measuring the x-ray magnetic circular dichroism at the L3 and L2 x-ray absorption edges to reveal the ratio of orbital to spin magnetic moments. It is shown that the effective spin-orbit interaction increases with Pt concentration within the 0%-10% Pt concentration range in a way that is consistent with theoretical expectations for all four measurements.