Anisotropic magnetoresistivity and magnetic entropy change in HoAl2

作者：de Souza M V^*; Plaza E J R; Campoy J C P

来源：Intermetallics, 2016, 75: 51-53.

DOI：10.1016/j.intermet.2016.05.005

• Magnetocaloric effect
• Magnetoresistivity
• Spin reorientation
• Anisotropy

We report a correlation between magnetoresistivity Delta rho(mag) and magnetic entropy change Delta S-mag for specified crystallographic directions of a HoAl2 single crystal. This ferromagnetic compound shows differentiated behavior among the members of the RAl2 series due to the presence of spontaneous spin reorientation. We discussed this effect in order to establish a relationship between the two quantities studied. The calculations were performed using a self-consistent model based on a Hamiltonian containing exchange, Zeeman and crystal field terms. We found that the normalized relation {Delta rho(mag)} = (T/T-C)(m){Delta S-mag}, with m = 0.1 for the [100] and [110] directions matches satisfactorily the two quantities.

• 出版日期2016-8