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Magnetic entropy change in perovskite manganites La0.6Pr0.1Pb0.3MnO3 with double metal-insulator peaks |
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| Authors: | Zhiming Wang Qingyu XuGang Ni He Zhang |
| Affiliation: | a Institute of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China b Department of Physics, Southeast University, Nanjing 211189, China c National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China d Department of Physics Fudan University, Shanghai 200433, China |
| Abstract: | Following the double metal-insulator peaks found in series of perovskite manganites La0.7−xPrxPb0.3MnO3 (x=0, 0.05, 0.1), the magnetic entropy change of La0.6Pr0.1Pb0.3MnO3 was carefully investigated as a representative. The maximum magnetic entropy change (ΔSH=−1.7 J/kg K at 300 K) and the expanded refrigerant capacity (about 123.8 J/kg) had been obtained under 10 kOe magnetic field variation, though the double peak of maximum magnetic entropy change had not occurred since the comparative faint magnetic signal from the Pr ions inhomogeneity existed in the octahedral frame submerged in the strong magnetic signal originated from the dominating octahedral frame both in the double exchange mechanism, but the width at half maximum in the magnetic entropy change comparatively broadened. |
| Keywords: | Perovskite manganite Double metal-insulator peaks Magnetic entropy change |
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