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有色金属工程:2020,(9):-
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[Pt/Co/Ta]n多层膜材料磁各向异性的调控研究
梅雪珍
(矿冶集团)
Modulation of magnetic anisotropy in [Pt/Co/Ta]n multilayer film
meixuezhen
(BGRIMM Technology Group)
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本文已被:浏览 45次   下载 17
投稿时间:2020-08-06    修订日期:2020-08-06
中文摘要: 调控铁磁薄膜材料的磁各向异性是构建低功耗、高密度磁存储器件的关键问题。本文系统地研究了[Pt/Co/Ta]n多层膜材料的磁各向异性随Co层厚度和周期数n的演变规律,并阐明其影响机理。结果表明:磁性多层膜的磁各向异性不仅取决于重金属Pt和Ta的5d电子与Co 3d电子的界面轨道杂化,还取决于薄膜界面质量。随着Co层厚度的增加,界面各向异性能迅速减小,导致薄膜由垂直磁各向异性逐渐转变为面内磁各向异性,磁各向异性能显著降低。另外,随着多层膜周期数的增加,薄膜表面的粗糙度增加,导致(111)织构破坏,进而使得Co的易磁化方向逐渐向面内倾倒,磁各向异性能下降。
Abstract:Regulating the magnetic anisotropy of ferromagnetic thin film is a key issue in the construction of low-power, high-density magnetic storage devices. This paper systematically studied the evolution of the magnetic anisotropy of [Pt/Co/Ta]n multilayer film with the thickness of Co layer and the number of periods n, and clarified the tunability mechanism. The research results show that the magnetic anisotropy of the [Pt/Co/Ta]n multilayer not only depends on the orbital hybridization between the Co 3d electrons and the 5d electrons of the heavy metals Pt and Ta, but also depends on the interface quality of the film. As the thickness of the Co layer increases, the film gradually changes from perpendicular to in-plane magnetic anisotropy with a rapid reduction of the interface anisotropy energy. Besides, as the period number of the film increases, the surface roughness of the film increases significantly. This result leads to the destruction of (111) texture, which in turn triggers the tilt of easy magnetization axis towards the in-plane direction.
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梅雪珍 矿冶集团 mei_xzh@bgrimm.com 
Author NameAffiliationE-mail
meixuezhen BGRIMM Technology Group mei_xzh@bgrimm.com 
引用文本:
梅雪珍.[Pt/Co/Ta]n多层膜材料磁各向异性的调控研究[J].有色金属工程,2020,(9):.

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