Anisotropic magnetocaloric effect in antiferromagnetic systems: Application to EuTiO3

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[1] Alho, B.P.
[2] Carvalho, A. Magnus G.
[3] Von Ranke, P.J.
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Alho, B.P. (brunoalho@gmail.com) | 1600年 / American Institute of Physics Inc.卷 / 116期
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In this work; we theoretically predicted an anisotropic magnetocaloric effect of the same order of magnitude of the usual magnetocaloric effect for antiferromagnetic systems. The anisotropic magnetic properties come from the anti-parallel alignment of the magnetic sites and can be optimized depending on the magnetic field change. This result highlights the applicability of antiferromagnetic compounds as refrigerants based on the anisotropic magnetocaloric effect. For this purpose; we considered a Hamiltonian model; including the exchange and Zeeman interactions in a two sublattices framework. It is worth noting that no anisotropy is explicitly included on the Hamiltonian model; although the system presents an anisotropic behavior. The calculations were applied to the G-type antiferromagnetic compound EuTiO3. © 2014 AIP Publishing LLC;
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