Abstract
We report on the magnetic entropy change and the critical exponents in the double perovskite manganite Y2NiMnO6 with a ferromagnetic to paramagnetic transition TC=85K. For a magnetic field change of 80kOe, a maximum magnetic entropy change -6.57 J /kg K is recorded around TC. The corresponding relative cooling power (134 J / kg) is appreciable towards potential application as a magnetic refrigerant. The critical exponents, beta and gamma satisfy well to values derived for a 3D Heisenberg ferromagnet.
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