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

Journal Article · Tue Jan 14 04:00:00 EST 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4861738· OSTI ID:22271245

Feng, Chun; Li, Xujing; Jiang, Yong; Yu, Guanghua ^[1]; Yang, Meiyin ^[1]; Gong, Kui ^[2]; Li, Baohe ^[3]

---

1. Department of Materials Physics and Chemistry, University of Science and Technology Beijing, Beijing 100083 (China)
2. Centre for the Physics of Materials and Department of Physics, McGill University, Montreal, Quebec H3A2T8 (Canada)
3. Department of Physics, School of Sciences, Beijing Technology and Business University, Beijing 100048 (China)

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.

• OSTI ID: 22271245
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 2 Vol. 115; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

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