Applied Physics A

, Volume 108, Issue 1, pp 149–153

Magnetic properties of epitaxial-grown exchange-coupled FePt/FeRh bilayer films

  • Wei Lu
  • Chenchong He
  • Zhe Chen
  • Junwei Fan
  • Biao Yan
Article

DOI: 10.1007/s00339-012-6862-1

Cite this article as:
Lu, W., He, C., Chen, Z. et al. Appl. Phys. A (2012) 108: 149. doi:10.1007/s00339-012-6862-1

Abstract

In this paper, (001) textured FeRh/FePt bilayer thin film was fabricated by sputtering and the temperature-dependent magnetic behavior of FePt/FeRh bilayers was investigated in detail. The magnetic regime passes from exchange bias to exchange spring when the temperature increases from low to high, resulting from the first-order antiferromagnetic (AFM) to ferromagnetic (FM) phase transition in ordered FeRh alloy layer. Controlling the temperature-allowed modification of the hysteresis loops of exchange-spring-like FeRh/FePt bilayer due to the nanoscale soft/hard interface exchange coupling, our experimental results clearly show that the coercive field decreases strongly at the temperature where FeRh completely transforms to ferromagnetic state. In an exchange-spring-like FeRh/FePt bilayer film, the out-of-plane magnetization reversal process was in two steps and resulted from domain wall nucleation and propagation from the FeRh layer into the FePt layer.

Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  • Wei Lu
    • 1
  • Chenchong He
    • 1
  • Zhe Chen
    • 1
  • Junwei Fan
    • 1
  • Biao Yan
    • 1
  1. 1.School of Materials Science and Engineering, Shanghai Key Lab of D&A for Metal-Functional MaterialsTongji UniversityShanghaiChina