Email this article THE INFLUENCE OF SR CONCENTRATION ON THE MAGNETIC PROPERTIES AND MAGNETOCALORIC EFFECTS OF Pr0,7Ca0,3-xSrxMnO3 COMPOUNDS
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Received: 06/03/19 Published: 08/03/19Authors
1. Nguyen Thi Dung
, University of Science – TNU2. Dinh Chi Linh, Graduate University of Science and Technology – VAST,
3. Nguyen Van Dang, University of Science – TNU
4. Vu Dinh Lam, Graduate University of Science and Technology – VAST,
5. Tran Dang Thanh, Graduate University of Science and Technology – VAST,
Abstract
Polycrystalline Pr0,7Ca0,3-xSrxMnO3 (0 ≤ x ≤ 0.3) with orthorhombic structure were synthesized by solid-state reaction method. The temperature dependence of magnetization was measured from 100 K to 300 K under different applied fields. We pointed out that Pr0.7Ca0.3-xSrxMnO3 compounds exhibitting the ferromagnetic property at low temperature and the paramagnetic behaviors at high temperature region. The Curie temperature TC was increased from 132 to 268 K with increasing Sr content from 0 to 0.3, respectively. A large magnetocaloric effect near room temperature has been observed. Under an applied magnetic field of 10 kOe, the values of maximum magnetic entropy change (|ΔSmax|) and relative cooling power (RCP) are about 3.44 J/kgK and 61.6 J/kg, respectively.
Keywords
Magnetocaloric effects; Ferromagnetic-paramagnetic; Magnetic entropy change; Perovskites
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