Magnetic entropy change in perovskite manganites La0.7A0.3MnO3 La0.7A0.3Mn0.9Cr0.1O3 (A = Sr,Ba, Pb) and Banerjee criteria on phase transition |
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| Institution: | 1. Institute of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China;2. National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China;1. Faculty of Physics, Semnan University, P.O. Box: 35195-363, Semnan, Iran;2. Department of Physics, Brock University, St. Catharines L2S 3A1, Canada;1. Laboratoire de Physique Appliquée, Faculté des Sciences de Sfax, BP 1171, Sfax 3000, Tunisie;2. Institut Néel, CNRS—Université J. Fourier, BP 166, 38042 Grenoble, France;1. Materials Science, Energy and Nano-engineering Department (MSN), University Mohammed VI Polytechnic, 43150, Benguerir, Morocco;2. Hassan First University of Settat, FST, Rayonnement-Matière et Instrumentation, S3M, 26000, Settat, Morocco;3. Materials and Nanomaterials Center, Moroccan Foundation for Advanced Science, Innovation and Research, 10100, Rabat, Morocco;1. Department of Physics, Chungbuk National University, Cheongju 361-763, Republic of Korea;2. Scientific-Practical Research Centre of NAS of Belarus, BY-220072 Minsk, Belarus;1. Departamento de Física, Universidade Federal de Sergipe, 49100-000 São Cristóvão, SE, Brazil;2. Cavendish Laboratory, Department of Physics, University of Cambridge, J.J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom;3. Laboratorio de Cerámicos y Nanomateriales, Facultad de Ciencias Física, Universidad Nacional Mayor de San Marcos, Ap. Postal 14-0149, Lima, Peru |
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| Abstract: | The La0.7A0.3MnO3, La0.7A0.3Mn0.9Cr0.1O3 (A = Sr, Ba, Pb) polycrystalline perovskite manganites sample was prepared by the sol–gel technique. The replacement of partial Mn3+/Mn4+ by Cr3+ (Cr3+ with the same electronic configuration as Mn4+) cause the variety of magnetocaloric property and magnetic entropy change. The maximum magnetic entropy change ΔSH = −1.16 J/kg K and the Relative Cooling Power (about 43.3 J/kg) were obtained from La0.7Sr0.3Mn0.9Cr0.1O3 in the Cr3+ doped series under 1 T magnetic field variation. On this paper, Banerjee criteria had been remarked to distinguish the first-order or second-order phase transition on phase transition of the doped perovskite manganites. |
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