Giant interfacial in-plane magnetic anisotropy in Co/Pt bilayers grown on MgO(110) substrates

IF 3.4 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Physical Review Materials Pub Date : 2024-02-21 DOI:10.1103/physrevmaterials.8.024408

Chao Zhou, Jia Xu, Yizheng Wu

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Abstract

Strong magnetic anisotropy is crucial for spintronic devices, but the strength of in-plane anisotropy (IMA) has constrained its applications in magnetic storage devices in contrast with the perpendicular magnetic anisotropy (PMA). In our study, we observed a giant interfacial uniaxial IMA in Co/Pt(110) bilayers that is approximately five times larger than the PMA in Co/Pt(111) systems. By adding another interface to form Pt/Co/Pt trilayers, the total interfacial uniaxial IMA can be further enhanced to

13.1 \pm 0.3 erg / {cm}^{2}

, making it a promising platform for high-density storage devices. The interfacial IMA in Co/Pt(110) bilayers is related to the Co at the interface and can be controlled by inserting an ultrathin Cu layer. Our results demonstrated the strong in-plane anisotropy in Co/Pt(110) systems, making it a promising platform for studying the spintronic phenomenon in strongly anisotropic systems.

Abstract Image

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在氧化镁（110）基底上生长的 Co/Pt 双层膜中的巨界面面内磁各向异性

强磁各向异性对自旋电子器件至关重要，但与垂直磁各向异性（PMA）相比，面内各向异性（IMA）的强度限制了它在磁存储设备中的应用。在我们的研究中，我们在 Co/Pt(110) 双层膜中观察到了巨大的界面单轴 IMA，它大约是 Co/Pt(111) 系统中 PMA 的五倍。通过添加另一个界面以形成 Pt/Co/Pt 三层膜，总的界面单轴 IMA 可以进一步提高到 13.1±0.3erg/cm2 ，使其成为一个很有前途的高密度存储设备平台。Co/Pt(110) 双层膜中的界面 IMA 与界面上的 Co 有关，可以通过插入超薄铜层来控制。我们的研究结果表明，Co/Pt(110) 系统具有很强的面内各向异性，使其成为研究强各向异性系统中自旋电子现象的理想平台。

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来源期刊

Physical Review Materials Physics and Astronomy-Physics and Astronomy (miscellaneous)

CiteScore

5.80

自引率

5.90%

发文量

611

期刊介绍： Physical Review Materials is a new broad-scope international journal for the multidisciplinary community engaged in research on materials. It is intended to fill a gap in the family of existing Physical Review journals that publish materials research. This field has grown rapidly in recent years and is increasingly being carried out in a way that transcends conventional subject boundaries. The journal was created to provide a common publication and reference source to the expanding community of physicists, materials scientists, chemists, engineers, and researchers in related disciplines that carry out high-quality original research in materials. It will share the same commitment to the high quality expected of all APS publications.