Aligned and exchange-coupled FePt-based films
Aligned and exchange-coupled FePt-based films
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DOI：
10.1063/1.3656038
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发表时间：
2011-10-24
影响因子：
4
通讯作者：
Sellmyer, D. J.
中科院分区：
文献类型：
--
作者：
Liu, Y.;George, T. A.;Sellmyer, D. J.
通过实验和模型计算研究了硬L1(0)有序FePt和软富铁fcc Fe-Pt的两相纳米结构。采用外延共溅射法制备了Fe-Pt薄膜，薄膜厚度约为10 nm。它们形成两相点，覆盖了表面的很大一部分，但彼此分开。x射线衍射和透射电镜显示，FePt相的c轴与膜平面垂直。实验和理论的磁滞回线表现出典型的交换耦合，并获得了优异的磁性能。所得样品的矫顽力、饱和磁化强度和标称能积的最大值分别为51 μ e、1287 μ u/cc和54 μ g / e。(C) 2011年美国物理研究所。(doi: 10.1063/1.3656038)
Two-phase nanostructures of hard L1(0)-ordered FePt and soft iron-rich fcc Fe-Pt are investigated experimentally and by model calculations. The Fe-Pt thin films were produced by epitaxial co-sputtering onto MgO and have a thickness of about 10 nm. They form two-phase dots that cover a large fraction of the surface but are separated from each other. X-ray diffraction and TEM show that the c-axis of the phase FePt is aligned in the direction normal to the film plane. The experimental and theoretical hysteresis loops indicate archetypical exchange coupling, and excellent magnetic properties are obtained. The largest values of coercivity, saturation magnetization, and nominal energy product obtained in the samples studied are 51 kOe, 1287 emu/cc, and 54 MGOe, respectively. (C) 2011 American Institute of Physics. [doi:10.1063/1.3656038]