Magnetic properties and magnetocaloric effect in RCr0.3Ge2 (R = Ho, Er) compounds
Abstract
Polycrystalline RCr0.3Ge2 (R = Ho, Er) compounds exhibiting magnetic transitions in the liquid helium temperature region were successfully synthesized, and their magnetic properties and magnetocaloric effects (MCEs) were systematically investigated. Both compounds exhibit antiferromagnetic ordering with Néel temperature (TN) of 7.3 and 3.4 K, respectively. Notably, HoCr0.3Ge2 and ErCr0.3Ge2 compounds demonstrate large reversible MCEs characterized by negligible thermal and magnetic hysteresis. Under a magnetic field change of 0–5 T, the maximum magnetic entropy changes [(−ΔSM)max] reach 9.0 and 9.9 J/kg K for HoCr0.3Ge2 and ErCr0.3Ge2 compounds, respectively, accompanied by considerable refrigeration capacities of 118.1 and 111.0 J/kg. The combination of significant MCE performance and excellent reversibility near 4.2 K positions these materials as highly promising candidates for practical cryogenic magnetic refrigeration.
Article Details
Journal Info
Journal of Applied Physics
American Institute of Physics
Authors (12)
Shihao Li
Biotechnology Research Institute, Chinese Academy of Agricultural Sciences
Jiawang Xu
Anhui Provincial Key Laboratory of Magnetic Functional Materials and Devices, School of Materials Science and Engineering, Anhui University Hefei 1 , Anhui 230601,
Lei Xi
Shouyuan Xing
Anhui Provincial Key Laboratory of Magnetic Functional Materials and Devices, School of Materials Science and Engineering, Anhui University Hefei 1 , Anhui 230601,
Junchao Sheng
Anhui Provincial Key Laboratory of Magnetic Functional Materials and Devices, School of Materials Science and Engineering, Anhui University Hefei 1 , Anhui 230601,
Yao Liu
Xucai Kan
School of Materials Science and Engineering, Anhui University 6 , Hefei 230601,
Yawei Gao
Chemical Science Division
Xinqi Zheng
School of Materials Science and Engineering
Shiming Zhou
Hefei National Research Center for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, National Synchrotron Radiation Laboratory, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, Department of Chemical Physics
Shouguo Wang
Baogen Shen
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences