Strain engineering of the magnetocaloric effect in MnAs epilayers.
作者： D. H. Mosca , F. Vidal , V. H. Etgens
DOI: 10.1103/PHYSREVLETT.101.125503
关键词: Strain engineering 、 Magnetic phase transition 、 Materials science 、 Epitaxy 、 Microelectronics 、 Condensed matter physics 、 Magnetic refrigeration 、 Atmospheric temperature range 、 Anisotropic strain
摘要: By using heteroepitaxy on two different GaAs templates, we have investigated the impact of anisotropic strain magnetocaloric effect (MCE) MnAs. The temperature range, spread around room temperature, and maximal MCE position are markedly in epitaxial systems. Simulated curves, obtained from a model based mean-field approximation, good agreement with experimental data, indicating that entropy variation is magnetic origin. These results illustrate how can be used to tune materials coupled structural phase transition suggest MnAs may find applications microelectronic circuitry.
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