Epitaxial Co50Fe50(110)/Pt(111) films on MgAl2O4(001) and its enhancement of perpendicular magnetic anisotropy
Epitaxial Co50Fe50(110)/Pt(111) films on MgAl2O4(001) and its enhancement of perpendicular magnetic anisotropy
复制标题
MgAl2O4(001)上外延Co50Fe50(110)/Pt(111)薄膜及其增强垂直磁各向异性
DOI：
10.1063/1.5093503
复制
发表时间：
2019
影响因子：
3.2
通讯作者：
Fengyuan Yang
中科院分区：
文献类型：
--
作者：
Aidan Lee;Adam S. Ahmed;S. Guo;B. Esser;D. McComb;Fengyuan Yang
低矫顽力磁性薄膜中的周向磁各向异性（PMA）是磁存储器件所期望的。已经发现，（111）取向或织构化的Pt种子层可以增强PMA，因此通常用于自旋电子结构中。我们通过离轴溅射在各种衬底上生长（111）取向的Pt外延膜，并研究了高质量外延生长的最佳衬底和取向。结果表明，Pt（111）外延薄膜在MgAl 2 O 4（001）衬底上生长良好，X射线衍射摇摆曲线非常窄。这种高品质的种子层被发现，以促进外延生长的Pt/Co 50 Fe 50/Pt三层具有强大的PMA相媲美的许多重复的磁性多层膜先前报道。此外，Pt种子层提高了Co 50 Fe 50的最大厚度，仍然可以保持PMA高达1.07 nm。在磁性薄膜中具有低矫顽力的磁各向异性（PMA）是磁存储器件所期望的。已经发现，（111）取向或织构化的Pt种子层可以增强PMA，因此通常用于自旋电子结构中。我们通过离轴溅射在各种衬底上生长（111）取向的Pt外延膜，并研究了高质量外延生长的最佳衬底和取向。结果表明，Pt（111）外延薄膜在MgAl 2 O 4（001）衬底上生长良好，X射线衍射摇摆曲线非常窄。这种高品质的种子层被发现，以促进外延生长的Pt/Co 50 Fe 50/Pt三层具有强大的PMA相媲美的许多重复的磁性多层膜先前报道。此外，Pt籽晶层提高了Co 50 Fe 50的最大厚度，其仍然可以将PMA保持到1.07 nm。
Perpendicular magnetic anisotropy (PMA) in magnetic thin films with low coercivity is desirable for magnetic memory devices. It has been found that a (111)-oriented or textured Pt seed layer can enhance PMA and is, therefore, commonly utilized in spintronic structures. We grow (111)-oriented Pt epitaxial films via off-axis sputtering on various substrates and investigate the optimal substrate and orientation for high quality, epitaxial growth. Our results show that Pt(111) epitaxial films grow remarkably well on MgAl2O4(001) with an exceptionally narrow X-ray diffraction rocking curve. This high-quality seed layer is found to promote epitaxial growth of Pt/Co50Fe50/Pt trilayers with strong PMA comparable to many repeats of the magnetic multilayers reported previously. In addition, the Pt seed layer enhances the maximum thicknesses of Co50Fe50 that can still maintain PMA up to 1.07 nm.Perpendicular magnetic anisotropy (PMA) in magnetic thin films with low coercivity is desirable for magnetic memory devices. It has been found that a (111)-oriented or textured Pt seed layer can enhance PMA and is, therefore, commonly utilized in spintronic structures. We grow (111)-oriented Pt epitaxial films via off-axis sputtering on various substrates and investigate the optimal substrate and orientation for high quality, epitaxial growth. Our results show that Pt(111) epitaxial films grow remarkably well on MgAl2O4(001) with an exceptionally narrow X-ray diffraction rocking curve. This high-quality seed layer is found to promote epitaxial growth of Pt/Co50Fe50/Pt trilayers with strong PMA comparable to many repeats of the magnetic multilayers reported previously. In addition, the Pt seed layer enhances the maximum thicknesses of Co50Fe50 that can still maintain PMA up to 1.07 nm.