论文标题
垂直磁化的Ni / Pt（001）外延超晶格
Perpendicularly Magnetized Ni / Pt (001) Epitaxial Superlattice
论文作者
论文摘要
垂直磁化铁磁层是最近/未来的高密度旋转记忆应用的重要组成部分。本文报告了垂直磁化的Ni / Pt超晶格的制造以及其结构和磁性特性的表征。膜增长条件的优化使我们能够在Srtio $ _ {3} $（001）单晶基板上生长外观Ni / pt（001）超晶格。我们研究了它们的结构参数和磁性特性，这是Ni层厚度的函数，并获得了1.9 x 10 $^{6} $ erg / cm $^{3} $的高单轴磁各向异性能量的高度，用于[Ni（4.0 nm） / pt（1.0 nm）] superlattice。为了阐明Ni / Pt（001）超晶格的垂直磁各向异性的详细机制，将实验结果与第一原理计算进行了比较。已经发现应变效应是垂直磁各向异性出现的主要来源。
A perpendicularly magnetized ferromagnetic layer is an important building block for recent/future highdensity spintronic memory applications. This paper reports on the fabrication of perpendicularly magnetized Ni / Pt superlattices and the characterization of their structures and magnetic properties. The optimization of film growth conditions allowed us to grow epitaxial Ni / Pt (001) superlattices on SrTiO$_{3}$ (001) single crystal substrates. We investigated their structural parameters and magnetic properties as a function of the Ni layer thickness, and obtained a high uniaxial magnetic anisotropy energy of 1.9 x 10$^{6}$ erg/cm$^{3}$ for a [Ni (4.0 nm) / Pt (1.0 nm)] superlattice. In order to elucidate the detailed mechanism on perpendicular magnetic anisotropy for the Ni / Pt (001) superlattices, the experimental results were compared with the first-principles calculations. It has been found that the strain effect is a prime source of the emergence of perpendicular magnetic anisotropy.
