Effect of Ag addition to L10 FePt and L10 FePd films grown by molecular beam epitaxy
Effect of Ag addition to L10 FePt and L10 FePd films grown by molecular beam epitaxy
复制标题
DOI：
10.1063/1.4864251
复制
发表时间：
2014-02
影响因子：
3.2
通讯作者：
Y. Tokuoka;Y. Seto;T. Kato;S. Iwata
中科院分区：
文献类型：
--
作者：
Y. Tokuoka;Y. Seto;T. Kato;S. Iwata
采用分子束外延方法在MgO（001）衬底上生长了L10有序FePt-Ag（5 nm）和FePd-Ag（5 nm）薄膜，研究了薄膜的晶体结构、表面结构、垂直磁各向异性和居里温度。在FePt-Ag的情况下，Ag的添加量为10-20 at. %的FePt-Ag薄膜能有效促进L10有序化和晶粒长大，从而提高FePt-Ag薄膜的垂直磁各向异性和矫顽力。另一方面，在FePd-Ag的情况下，Ag的添加改变了表面形貌从岛状到连续膜与其垂直各向异性和垂直各向异性的降低。FePt-Ag和FePd-Ag的晶格常数和居里温度随Ag添加量的变化有显著差异。对于FePd-Ag，c轴和a轴晶格间距以及居里温度随着Ag含量的增加而逐渐变化，而FePt-Ag则没有变化。这些结果表明，可能…
L10 ordered FePt-Ag (5 nm) and FePd-Ag (5 nm) films were grown on MgO (001) substrate at temperatures of 250–400 °C by using molecular beam epitaxy method, and their crystal and surface structures, perpendicular magnetic anisotropies and Curie temperatures were investigated. In the case of FePt-Ag, Ag addition with the amount of 10–20 at. % was effective to promote L10 ordering and granular growth, resulting in the increase of the perpendicular magnetic anisotropy and coercivity of the FePt-Ag films. On the other hand, in the case of FePd-Ag, Ag addition changed the surface morphology from island to continuous film associated with the reductions of its coercivity and perpendicular anisotropy. The variations of lattice constants and Curie temperature with Ag addition were significantly different between FePt-Ag and FePd-Ag. For FePd-Ag, the c and a axes lattice spacings and Curie temperature gradually changed with increasing Ag content, while they unchanged for FePt-Ag. These results suggest the possibilit...