Fackler Sean W, Alexandrakis Vasileios, König Dennis, Kusne A Gilad, Gao Tieren, Kramer Matthew J, Stasak Drew, Lopez Kenny, Zayac Brad, Mehta Apurva, Ludwig Alfred, Takeuchi Ichiro
Department of Materials Science & Engineering, University of Maryland, College Park, MD, USA.
Materials Measurement Science Division, Institute for Materials, Ruhr-Universität Bochum, Bochum, Germany.
Sci Technol Adv Mater. 2017 Mar 20;18(1):231-238. doi: 10.1080/14686996.2017.1287520. eCollection 2017.
Thin film libraries of Fe-Co-V were fabricated by combinatorial sputtering to study magnetic and structural properties over wide ranges of composition and thickness by high-throughput methods: synchrotron X-ray diffraction, magnetometry, composition, and thickness were measured across the Fe-Co-V libraries. In-plane magnetic hysteresis loops were shown to have a coercive field of 23.9 kA m (300 G) and magnetization of 1000 kA m. The out-of-plane direction revealed enhanced coercive fields of 207 kA m (2.6 kG) which was attributed to the shape anisotropy of column grains observed with electron microscopy. Angular dependence of the switching field showed that the magnetization reversal mechanism is governed by 180° domain wall pinning. In the thickness-dependent combinatorial study, co-sputtered composition spreads had a thickness ranging from 50 to 500 nm and (FeCo)V compositions of x = 2-80. Comparison of high-throughput magneto-optical Kerr effect and traditional vibrating sample magnetometer measurements show agreement of trends in coercive fields across large composition and thickness regions.
通过组合溅射制备了Fe-Co-V薄膜库，以利用高通量方法研究广泛成分和厚度范围内的磁性和结构特性：通过同步加速器X射线衍射、磁力测量法对Fe-Co-V薄膜库的成分和厚度进行了测量。面内磁滞回线显示矫顽场为23.9 kA/m（300 G），磁化强度为1000 kA/m。面外方向显示矫顽场增强至207 kA/m（2.6 kG），这归因于电子显微镜观察到的柱状晶粒的形状各向异性。开关场的角度依赖性表明，磁化反转机制受180°畴壁钉扎控制。在与厚度相关的组合研究中，共溅射成分范围的厚度为50至500 nm，x = 2-80的(FeCo)V成分。高通量磁光克尔效应与传统振动样品磁强计测量结果的比较表明，在大成分和厚度区域内，矫顽场趋势一致。
