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Micromagnetic modeling of L10-ordered FePtmagnetic thin films

Li Zheng-Hua Li Xiang

Micromagnetic modeling of L10-ordered FePtmagnetic thin films

Li Zheng-Hua, Li Xiang
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Publishing process
  • Received Date:  15 April 2014
  • Accepted Date:  25 April 2014
  • Published Online:  05 August 2014

Micromagnetic modeling of L10-ordered FePtmagnetic thin films

  • 1. School of Physics and Materials Engineering, Dalian Nationalities University, Dalian 116600, China;
  • 2. School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
Fund Project:  Project supported by the National Natural Science Foundation of China (Grant Nos. 61103148, 51202146), the Program for Excellent Talents in Institution of Higher Education of Province, China (Grant No. LJQ2013129), and the 46th Scientific Research Starting Foundation for the Returned Overseas Chinese Scholars of Ministry of Education, China.

Abstract: The L10-ordered FePt films are promising materials for ultra high density magnetic recording media due to their high magnetic anisotropies. In this work, the L10-ordered FePt thin films are prepared by magnetron sputtering on CrW underlayer. A three-dimensional micromagnetic model, based on the symmetry of the L10 phase, is set up for FePt perpendicular media. According to the mismatch between the underlayer and FePt magnetic layer, a residual tensile stress is applied in the film plane. The simulated M-H loops accord well with the experimental results. The tetragonal crystalline anisotropy, especially high in-plane anisotropy, could enlarge the in-plane coercivity. The simulated perpendicular and longitudinal loops each have an open up in the tail, which is mainly due to the magnetostriction of the L10 phase.

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