Structure, Magnetic and Magnetocaloric Properties of Nonstoichiometric TbCo2Mnx Compounds

Аннотация

TbCo₂Mn_x (x ≤ 1) alloys were synthesized and their crystal structure, heat capacity, magnetic and magnetocaloric properties were studied. Single-phase compounds with the MgCu₂-type structure were formed at х < 0.4. In alloys with х > 0.4, additional phases with the PuNi₃- and Th₆Mn₂₃-type structures form. It was shown that there is a substantial increase in the Curie temperature and magnetic moment of 3d‑metal sublattice of the nonstoichiometric compounds when compared to those of the TbCo₂ binary compound. The magnetocaloric effect of single- and multiphase alloys were estimated based on magnetic and heat capacity measurements.