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|Type:||Artigo de periódico|
|Title:||Lattice distortion effects on the magnetostructural phase transition of MnAs|
|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.|
|Editor:||American Physical Soc|
|Citation:||Physical Review Letters. American Physical Soc, v. 95, n. 7, 2005.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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