Abstract
Magnetocaloric properties of antiferromagneticRGa2 (R = Ce, Pr, Nd, Dy, Ho and Er) compounds have been reported. These systemspresent an antiferromagnetic transition below 15 K and a field inducedmetamagnetic transition from the antiferromagnetic to ferromagnetic state.Our results show that the character of the magnetic field induced transitionalong the series affects the magnetocaloric properties. For the compounds withR = Ho, Dy and Er both negative and positive magnetocaloric effect (MCE) were observed aboveμ0ΔH = 2 T where the rate between negative and positive MCE contributions depends on how the magnetictransitions occur in these compounds. The evaluated values of maximum magnetocaloric propertiesof RGa2 compounds are similar to other potential magnetic refrigerant materials reported in theliterature.
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