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Title: Dynamical mechanism for coercivity tunability in the electrically controlled FePt perpendicular films with small grain size

This article reports property manipulations and related dynamical evolution in electromigration controlled FePt perpendicular films. Through altering voltage and treatment time of the power supply applied on the films, electronic momentum was fleetly controlled to manipulate the kinetic energy of Fe and Pt atoms based on momentum exchanges. The electromigration control behavior was proven to cause steerable ordering degree and grain growth in the films without thermal treatment. Processed FePt films with small grain size, high magnetocrystalline anisotropy, and controllable coercivity can be easily obtained. The results provide a novel method for tuning magnetic properties of other L1{sub 0} structured films.
Authors:
; ; ;  [1] ;  [1] ;  [2] ;  [3] ;  [4]
  1. Department of Materials Physics and Chemistry, University of Science and Technology Beijing, Beijing 100083 (China)
  2. (MINT) and Department of Electrical and Computer Engineering, University of Minnesota, 200 Union St SE, Minneapolis, Minnesota 55455 (United States)
  3. Centre for the Physics of Materials and Department of Physics, McGill University, Montreal, Quebec H3A2T8 (Canada)
  4. Department of Physics, School of Sciences, Beijing Technology and Business University, Beijing 100048 (China)
Publication Date:
OSTI Identifier:
22271245
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 2; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANISOTROPY; COERCIVE FORCE; CRYSTAL STRUCTURE; ELECTRIC POTENTIAL; ELECTROPHORESIS; FILMS; GRAIN GROWTH; GRAIN SIZE; HEAT TREATMENTS; INTERMETALLIC COMPOUNDS; IRON; MAGNETIC PROPERTIES; PLATINUM