Spin Transport and Magnetic Proximity Effect in CoFeB/Normal Metal/Pt Trilayers

IF 1.1 4区物理与天体物理 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE Magnetics Letters Pub Date : 2023-12-06 DOI:10.1109/LMAG.2023.3340122

Simon Häuser;Matthias R. Schweizer;Sascha Keller;Andres Conca;Moritz Hofherr;Evangelos Papaioannou;Benjamin Stadtmüller;Burkard Hillebrands;Martin Aeschlimann;Mathias Weiler

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引用次数: 0

Abstract

We present a study of the damping and spin pumping properties of CoFeB/X/Pt systems with

$\rm X=Al,Cr$

, and

$\rm Ta$

. We show that the total damping of the CoFeB/Pt systems is strongly reduced when an interlayer is introduced independently of the material. Using a model that considers spin relaxation, we identify the origin of this contribution in the magnetically polarized Pt formed by the magnetic proximity effect (MPE), which is suppressed by the introduction of the interlayer. The induced ferromagnetic order in the Pt layer is confirmed by element-sensitive transverse magneto-optical Kerr spectroscopy at the M

$_{2,3}$

and N

$_{7}$

absorption edges. We discuss the impact of the MPE on parameter extraction in the spin transport model.

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CoFeB/ 正常金属/铂三层膜中的自旋传输和磁接近效应

我们介绍了对具有 $\rm X=Al,Cr$ 和 $\rm Ta$ 的 CoFeB/X/Pt 系统的阻尼和自旋泵特性的研究。我们的研究表明，当引入独立于材料的夹层时，CoFeB/Pt 系统的总阻尼会大大降低。通过使用一个考虑自旋弛豫的模型，我们确定了由磁接近效应（MPE）形成的磁极化铂中这一贡献的来源，而引入中间膜后，磁接近效应被抑制。在 M$_{2,3}$ 和 N$_7$ 吸收边作为元素敏感探针的横向磁光 Kerr 光谱证实了铂层中的诱导铁磁秩序。我们讨论了 MPE 对自旋输运模型参数提取的影响。

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来源期刊

IEEE Magnetics Letters PHYSICS, APPLIED-

CiteScore

2.40

自引率

0.00%

发文量

期刊介绍： IEEE Magnetics Letters is a peer-reviewed, archival journal covering the physics and engineering of magnetism, magnetic materials, applied magnetics, design and application of magnetic devices, bio-magnetics, magneto-electronics, and spin electronics. IEEE Magnetics Letters publishes short, scholarly articles of substantial current interest. IEEE Magnetics Letters is a hybrid Open Access (OA) journal. For a fee, authors have the option making their articles freely available to all, including non-subscribers. OA articles are identified as Open Access.