Transport and magnetic study of the spin reorientation transition in the Tb5(Si0.5Ge0.5)4magnetocaloric compound
J. P. AraújoAndré M. PereiraM.E. BragaR.P. PintoJ. M. TeixeiraF.C. CorreiaJ. B. SousaL. MorellónP. A. AlgarabelCésar MagénM. R. Ibarra
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Abstract:
Detailed measurements of the electrical resistivity ?(T), thermopower S(T) and magnetization of Tb5(Si0.5Ge0.5)4 in the vicinity of the spin reorientation transitions observed in this compound are reported. Our results indicate a complex spin reorientation process associated with three different lattice sites occupied by the Tb ions. We identify two critical transition temperatures: one at TSR1 = 57?K, as previously reported, and a new one at TSR2 = 40?K. A simple model based on an approximate magnetic anisotropy energy is presented; it gives a satisfactory qualitative description of the main features of the reorientation processes.Keywords:
Magnetic refrigeration
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Magnetic refrigeration
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