Understanding the inverse magnetocaloric effect in antiferro- and ferrimagnetic arrangements

abstract

The inverse magnetocaloric effect occurs when a magnetic material cools down under applied magnetic field in an adiabatic process. Although the existence of the inverse magnetocaloric effect was recently reported experimentally, a theoretical microscopic description is almost nonexistent. In this paper we theoretically describe the inverse magnetocaloric effect in antiferro- and ferrimagnetic systems. The inverse magnetocaloric effects were systematically investigated as a function of the model parameters. The influence of the Neel and the compensation temperature on the magnetocaloric effect is also analyzed using a microscopic model.

keywords

ROOM-TEMPERATURE; ADIABATIC MAGNETIZATION; TRANSITION; REFRIGERATION; MNAS1-XSBX; COMPOUND; BEHAVIOR; ENTROPY

subject category

Physics

authors

von Ranke, PJ; de Oliveira, NA; Alho, BP; Plaza, EJR; de Sousa, VSR; Caron, L; Reis, MS

Groups

acknowledgements

We acknowledge financial support from CNPq-Conselho Nacional de Desenvolvimento Cientifico e Tecnologico Brazil, FAPERJ-Fundacao de Amparo a Pesquisa do Estado do Rio de Janeiro.

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