Study on the critical behavior and magnetocaloric effect of RCrO3 (R = Gd,Dy) |
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| Affiliation: | 1. Magnetism Key Laboratory of Zhejiang Province, China Jiliang University, Hangzhou, 310018, China;2. Secretariat of Hangzhou Consumer Rights Protection Committee, China;1. Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China;2. College of Materials Science and Engineering, Nanjing Tech University, Nanjing, 211816, China;3. Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing, Yantai, 264006, Shandong, China;4. Avic Manufacturing Technology Institute, Beijing, 100024, China;1. Department of Physics, Central University of Rajasthan Bandarsindri, Ajmer, 305817, Rajasthan, India;2. Department of Physics, National Dong-Hwa University, Hualien, 974, Taiwan;2. Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou, 341119, China;3. School of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan, 030024, China;1. School of Physics and Materials Engineering, Hefei Normal University, Hefei, 230601, China;2. The Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, Chinese Academy of Science (CAS), Hefei, 230031, China |
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| Abstract: | In this study, we aim to examine the critical behavior and magnetocaloric effect of RCrO3 (R = Gd, Dy) polycrystal synthesized by solid-state sintering. As per the heat capacity fitting curves, GdCrO3 and DyCrO3 fit the 3D-XY and 3D-Ising models, respectively. The analysis of heat capacity curves, field cooling (FC), and zero-field cooling (ZFC) curves reveals two magnetic phase transitions in the samples, with TNCr = 174 K, TNGd = 3.7 K and TNCr = 152 K, TNDy = 3.5 K for GdCrO3 and DyCrO3, respectively. Under a 50 kOe magnetic field, the maximum magnetic entropy change (−ΔSmmax) and relative cooling efficiency (RCP) of the sample are 39.9 J/kg K, 373.4 J/kg and 15.9 J/kg K, 276 J/kg for the two samples, respectively. We believe that the significant magnetocaloric effect of GdCrO3 is associated with its critical behavior. This provides an additional reference for the origin of the large magnetocaloric effect of materials. |
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| Keywords: | Magnetocaloric effect Critical behavior Magnetic refrigeration Heat capacity |
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