The influence of dipolar and quadrupolar interactions on the magnetoresistivity and magnetocaloric effect in TmZn investigated through a microscopic model

Interesting behaviors in the magnetocaloric effect and magnetoresistivity are predicted for cubic CsCl-type TmZn compound in which, recently, the giant magnetocaloric effect was reported. Our model includes the crystalline electrical field, exchange, Zeeman and elastic-quadrupolar interactions. The calculated giant magnetocaloric effect is in agreement with the experimental data upon magnetic field variation along the easy magnetic direction 〈0 0 1〉. For applied magnetic field direction 〈1 1 0〉an inverse magnetocaloric effect was predicted in the temperature range from 0.7 to 8.2 K. For applied magnetic field along 〈1 1 1〉direction, a discontinuity in magnetic entropy change was predicted at 14.1 K leading to a latent heat of 80 J/mol and magnetic entropy change of 36 J mol−1 K−1 in the field change from zero to 5 T. Besides, strong correlation between the anisotropic magnetoresistivity and magnetocaloric effects was reported.