Theoretical prediction of large anisotropic magnetocaloric effect in MnP

Abstract Recent discovery of the rotating magnetocaloric effect in rare-earth and transition metal compounds opens up a potential application for the next generation of the cooling device with fast operation time and compact size. However, there are few theoretical works on this phenomenon. We study the anisotropic magnetocaloric effect in MnP by combining first-principles calculations and Monte-Carlo simulations. The magnetocrystalline anisotropy energy is not negligible even above the Curie temperature due to the effect of the external magnetic field on the magnetization. The dependence of the isothermal magnetic entropy change on the direction of an applied magnetic field is quantitatively reproduced by using our model. The large rotating magnetic entropy changes in MnP are predicted theoretically.