Work

A generalized magnetic refrigeration scheme

Year: 2014

Type: article

Abstract: We have investigated the magnetocaloric effects in antiferromagnets and compared them with those in ferromagnets using Monte Carlo simulations. In antiferromagnets, the magnetic entropy reaches a maximum value at a finite magnetic field when the temperature is fixed below the Néel temperature. Using the fact, we proposed a protocol for applying magnetic fields to achieve the maximum efficiency for magnetic refrigeration in antiferromagnets. In particular, we found that at low temperatures, antiferromagnets are more useful for magnetic refrigeration than ferromagnets.

Source: Applied Physics Letters

DOI: 10.1063/1.4864161

Authors: Ryo Tamura, Takahisa Ohno, Hideaki Kitazawa

Institution: National Institute for Materials Science

Language: English

Topic: Magnetic and transport properties of perovskites and related materials

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

Funder: Japan Society for the Promotion of Science

Award: Development of High-Performance Magnetic Refrigeration Materials by Numerical Simulations