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Magnetocaloric Effect of Tb-doped Double Perovskite Oxide Pr2CoMnO6 |
LI Xiaoxin1,XING Ru1,2,LIU Jiao1,WANG Ting1,SUN Yunbin1,2,CHEN Hongwei1,ZHAO Jianjun1,2() |
1. Baotou Teachers College Physics Institute of Science and Technology, Baotou 014030, China 2. Key Laboratory for Magnetism and Magnetic Material of Inner Mongolia Autonomous Region, Baotou Teachers College, Baotou 014030, China |
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Cite this article:
LI Xiaoxin, XING Ru, LIU Jiao, WANG Ting, SUN Yunbin, CHEN Hongwei, ZHAO Jianjun. Magnetocaloric Effect of Tb-doped Double Perovskite Oxide Pr2CoMnO6. Chinese Journal of Materials Research, 2020, 34(1): 73-80.
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Abstract A series of double perovskite oxide Pr(2-x)TbxCoMnO6 (x=0, 0.05, 0.1, 0.15) was prepared by high temperature solid state reaction. The effect of Tb-doping on the Curie temperature, magnetic entropy change and magnetic phase transition of double perovskite oxide Pr2CoMnO6 was investigated by analyzing the relevant data. The results show that the series of double perovskite oxides Pr(2-x)TbxCoMnO6 (x=0,0.05,0.1,0.15) all is good single-phase with crystallographic structure of monoclinic P21/n; they all have two magnetic transition points (TC1 and TC2); TC1 and TC2 decrease with the increasing Tb-content; within the desired temperature region, as the temperature decreases the state of the prepared four double perovskite oxides underwent the following transition: paramagnetic state, paramagnetic-ferromagnetic and coexistence state; by a given external magnetic field of 7 T, the maximum magnetic entropy change ΔSMof the prepared four double perovskite oxides is -1.862, -1.779, -1.768 and -1.766 J/(kg·K) respectively. In other word, Tb-doping makes the maximum magnetic entropy change smaller, but increases its half-height wide temperature range. It can be judged that among others, Pr1.9Tb0.1CoMnO6 is the most potential candidate as a high-temperature magnetic refrigeration material especially, regarding to its RCP value; Based on the analysis of the Arrott curve, the recalibration curve and the Loop curve, the four double perovskite oxides underwent a first-order phase transition during the process.
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Received: 12 June 2019
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Fund: National Natural Science Foundation of China(11164019);National Natural Science Foundation of China(51562032);National Natural Science Foundation of China(61565013);Inner Mongolia Autonomous Region Science Fund(2015MS0109);Inner Mongolia University Science Research Fund(NJZZ11166);Inner Mongolia University Science Research Fund(NJZY12202);Baotou Science and Technology Bureau Industry-University-Research Cooperation Project(2014X1014);Baotou Science and Technology Bureau Industry-University-Research Cooperation Project(2015Z2011) |
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