Magnetocaloric effect in Ni$_{50.3}$Mn$_{36.5}$Sn$_{13.2}$ ribbon Heusler alloy in cyclic magnetic fields

Magnetocaloric properties in ribbon sample of Ni$_{50.3}$Mn$_{36.5}$Sn$_{13.2}$ Heusler alloy are studied by a direct method in cyclic magnetic fields. A strong anisotropy in the magnetocaloric effect is observed in weak magnetic fields, obtaining a large value of MCE when the field is applied parallel to the ribbon plane. The field dependence of the MCE anisotropy is studied and its decrease is clearly revealed in moderate fields. It was found that in cyclic magnetic fields, the MCE value near the magnetostructural phase transition depends on the rate of temperature scanning: a higher rate of the temperature sweep results in greater value of the MCE.