Spin pumping in asymmetric Fe50Pt50/Cu/Fe20Ni80 trilayer structure
Spin pumping in asymmetric Fe50Pt50/Cu/Fe20Ni80 trilayer structure
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非对称 Fe50Pt50/Cu/Fe20Ni80 三层结构中的自旋泵浦
DOI：
10.1002/pssr.201900267
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发表时间：
2019
影响因子：
2.8
通讯作者：
Y. Fukuma
中科院分区：
文献类型：
--
作者：
R. Medwal;S. Gupta;R. S. Rawat;A. Subramanian;Y. Fukuma
本文报道了非对称Fe50Pt50/Cu/Fe20Ni80软磁三层结构的自旋输运动力学，并通过宽频带铁磁共振测量的角度依赖性确定了包括阻尼和有效场在内的磁参数的调制。在单个磁层的不同进动下，自旋抽运占主导地位，预期线宽增加。宽范围共振组态的相互进动表明，Fe50Pt50和Fe20Ni80系统的各向异性场集体减小约200 mT。随后对无过剩界面损耗的观察表明，可以通过调节多层结构中的自旋电流净流量来控制自旋泵浦效应。这些实验结果对需要磁性多层膜中各向异性场可调的微波器件具有重要意义。
Herein, spin transport dynamics across asymmetric Fe50Pt50/Cu/Fe20Ni80soft‐magnetic trilayer structure is reported and thereby modulation of magnetic parameters including damping and effective field is determined by means of the angular dependence of broadband ferromagnetic resonance measurements. At distinct precession of individual magnetic layer, spin‐pumping is found to be prevalent with expected linewidth increase. Mutual precession for wide range of resonance configuration reveals a collective reduction in anisotropy field of around 200 mT for both Fe50Pt50and Fe20Ni80systems. Subsequent observation of no‐excess interface damping shows the possible control of spin‐pumping effect by tuning the net flow of spin‐current in a multilayer structure. These experimental findings have significance for microwave devices that require tunable anisotropy field in magnetic multilayers.