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- Title
Magnetic properties of epitaxial-grown exchange-coupled FePt/FeRh bilayer films.
- Authors
Lu, Wei; He, Chenchong; Chen, Zhe; Fan, Junwei; Yan, Biao
- 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.
- Subjects
MAGNETIC properties of metallic films; EPITAXY; TRANSITION metals; METALS; CRYSTAL texture; MICROFABRICATION; SPUTTERING (Physics); TEMPERATURE effect
- Publication
Applied Physics A: Materials Science & Processing, 2012, Vol 108, Issue 1, p149
- ISSN
0947-8396
- Publication type
Article
- DOI
10.1007/s00339-012-6862-1