Aligned and exchange-coupled FePt-based films
作者： Y. Liu , T. A. George , Ralph Skomski , D. J. Sellmyer
DOI: 10.1063/1.3656038
关键词: Materials science 、 Phase (matter) 、 Coercivity 、 Hysteresis 、 Sputter deposition 、 Film plane 、 Condensed matter physics 、 Magnetization 、 Thin film 、 Magnetic hysteresis
摘要: Two-phase nanostructures of hard L10-ordered FePt and soft iron-rich fcc Fe-Pt are investigated experimentally by model calculations. The thin films were produced epitaxial co-sputtering onto MgO have a thickness about 10 nm. They form two-phase dots that cover large fraction the surface but separated from each other. X-ray diffraction TEM show c-axis phase is aligned in direction normal to film plane. experimental theoretical hysteresis loops indicate archetypical exchange coupling, excellent magnetic properties obtained. largest values coercivity, saturation magnetization, nominal energy product obtained samples studied 51 kOe, 1287 emu/cc, 54 MGOe, respectively.
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sci-hub.se 参考文章(16)
Tom A. George, Yongsheng Yu, Lanping Yue, Ralph Skomski, D. J. Sellmyer, Control of Coercivity in Exchange-Coupled Graded (001) $\hbox{FePt}:\hbox{SiO}_{2}$ Nanocomposite Films IEEE Transactions on Magnetics. ,vol. 46, pp. 2435- 2437 ,(2010) , 10.1109/TMAG.2009.2039554
Eric E Fullerton, J.S Jiang, S.D Bader, Hard/soft magnetic heterostructures: model exchange-spring magnets Journal of Magnetism and Magnetic Materials. ,vol. 200, pp. 392- 404 ,(1999) , 10.1016/S0304-8853(99)00376-5
F. Casoli, F. Albertini, L. Nasi, S. Fabbrici, R. Cabassi, F. Bolzoni, C. Bocchi, Strong coercivity reduction in perpendicular FePt∕Fe bilayers due to hard/soft coupling Applied Physics Letters. ,vol. 92, pp. 142506- ,(2008) , 10.1063/1.2905294
T. Shima, K. Takanashi, Y. K. Takahashi, K. Hono, Coercivity exceeding 100 kOe in epitaxially grown FePt sputtered films Applied Physics Letters. ,vol. 85, pp. 2571- 2573 ,(2004) , 10.1063/1.1794863
David J. Sellmyer, Strong magnets by self-assembly Nature. ,vol. 420, pp. 374- 375 ,(2002) , 10.1038/420374A
W. Liu, Y. Liu, R. Skomski, D. J. Sellmyer, Nanostructured Exchange-Coupled Magnets ChemInform. ,vol. 37, pp. 182- 266 ,(2006) , 10.1007/1-4020-7984-2_6
V. Alexandrakis, Th. Speliotis, E. Manios, D. Niarchos, J. Fidler, Jehyun Lee, G. Varvaro, Hard/graded exchange spring composite media based on FePt Journal of Applied Physics. ,vol. 109, ,(2011) , 10.1063/1.3556773
R. Skomski, T. A. George, D. J. Sellmyer, Nucleation and wall motion in graded media Journal of Applied Physics. ,vol. 103, ,(2008) , 10.1063/1.2835483
David Kramer, None, Concern grows over China’s dominance of rare-earth metals Physics Today. ,vol. 63, pp. 22- 24 ,(2010) , 10.1063/1.3431322
Ralph Skomski, J. M. D. Coey, Giant energy product in nanostructured two-phase magnets. Physical Review B. ,vol. 48, pp. 15812- 15816 ,(1993) , 10.1103/PHYSREVB.48.15812