Temperature dependent magnetic anisotropy in (Ga, Mn)As layers
By Maciej Sawicki, Fumihiro Matsukura, A. Idziaszek, T. Dietl, G. M. Schott, C. Ruester, C. Gould, G. Karczewski, Georg Schmidt, L. Molenkamp. 2002
141 citations recorded by the source corpus.
It is demonstrated by SQUID measurements that (Ga,Mn)As films can exhibit perpendicular easy axis at low temperatures, even under compressive strain, provided that the hole concentration is sufficiently low. In such films, the easy axis assumes a standard in-plane orientation when the temperature is raised towards the Curie temperature or the hole concentration is increased by low temperature annealing. These findings are shown to corroborate quantitatively the predictions of the mean-field Zener model for ferromagnetic semiconductors. The in-plane anisotropy is also examined, and possible mechanisms accounting for its character and magnitude are discussed.
Subfields: Condensed Matter Physics, Materials Chemistry, Mechanics of Materials
View Paper: https://www.semanticscholar.org/paper/6d6d5f9ba57caefaaa91a0082db6e22036a22668
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In Condensed Matter Physics
In Materials Chemistry
Citations in the corpus
- Dilute ferromagnetic semiconductors: Physics and spintronic structures (2013, background): “…hole densities p & 1021 cm−3, a subsequent spin reorientation transition between in-plane and perpendicular-to-plane magnetic anisotropy is expected theoretically for (Ga,Mn)As (Sawicki et al., 2004; Werpachowska and Dietl, 2010b; Zemen et al., 2009), which has not yet been found experimentally.”