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Type: Artigo de periódico
Title: Lattice distortion effects on the magnetostructural phase transition of MnAs
Author: Iikawa, F
Brasil, MJSP
Adriano, C
Couto, ODD
Giles, C
Santos, PV
Daweritz, L
Rungger, I
Sanvito, S
Abstract: We present a systematic experimental and theoretical study of the first-order phase transition of epitaxially grown MnAs thin films under biaxial tensile stress. Our results give direct information on the dependence of the phase-transition temperature of MnAs films on the lattice parameters. We demonstrate that an increase of the lattice constant in the hexagonal plane raises the phase-transition temperature (T-p), while an increase of the perpendicular lattice constant lowers T-p. The results of calculations based on density functional theory are in good agreement with the experimental ones. Our findings open exciting prospects for magneto-mechanical devices, where the critical temperature for ferromagnetism can be engineered by external stress.
Country: EUA
Editor: American Physical Soc
Citation: Physical Review Letters. American Physical Soc, v. 95, n. 7, 2005.
Rights: aberto
Identifier DOI: 10.1103/PhysRevLett.95.077203
Date Issue: 2005
Appears in Collections:Unicamp - Artigos e Outros Documentos

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