Combinatorial study of Fe-Co-V hard magnetic thin films. Issue 1 (31st December 2017)

• Record Type: Journal Article
• Authors: 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
• Is Part Of: Science and technology of advanced materials. Volume 18:Issue 1(2017)
• Page Start: 231
• Page End: 238
• Publication Date: 2017-12-31
• Subjects: Vicalloy -- permanent magnet -- high-throughput -- combinatorial thin film; 50 Energy Materials -- 306 Thin film / Coatings -- 203 Magnetics / Spintronics / Superconductors; Materials -- Technological innovations -- Periodicals; 620.112
• DOI: 10.1080/14686996.2017.1287520
• Languages: English
• ISSNs: 1468-6996

Abstract

Abstract: 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 –1 (300 G) and magnetization of 1000 kA m –1 . The out-of-plane direction revealed enhanced coercive fields of 207 kA m –1 (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 (Fe70 Co30 )100-x Vx 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. Abstract :