DataVXChemistry of MaterialsPaper
journal article·2024-02-13

Giant Low-Field Magnetocaloric Effect in the Superlattice Antiferromagnetic ErFe2Si2 Compound

D. S. Wang, X. Q. Zheng, J. W. Xu, L. H. He, Y. W. Gao, H. Huang, H. Wu, X. Y. Cao, D. Liu, J. X. Shen, G. Y. Wang, J. Y. Zhang, Y. F. Wu, F. X. Hu, S. G. Wang, B. G. Shen

Chemistry of Materials· Volume 36· Issue 3
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Source abstract

Abstract

We present herein a systematic study of a polycrystalline magnetocaloric compound ErFe 2 Si 2 . It exhibits a transition from the antiferromagnetic to the paramagnetic phase around 3.0 K according to magnetic and heat capacity measurements. Neutron powder diffraction revealed that ErFe 2 Si 2 possesses a superlattice magnetic structure with a propagation vector of (0, 0, 0.5). The superlattice magnetic structure can be modeled by a transverse spin density wave (cosine-modulated) or a spiral type, which cannot be distinguished solely by neutron powder diffraction (NPD) pattern fitting. The stability of different types of magnetic structures was also investigated by first-principles calculations. The ErFe 2 Si 2 compound shows a giant magnetocaloric effect with a maximal negative magnetic entropy change and an adiabatic temperature change of 11.5 J/kg K and 5.7 K, respectively, under the field change of 0–1 T. The large low-field magnetocaloric effect is related to its low critical field of metamagnetic transition and its low quasi-saturation magnetic field. The excellent performance of ErFe 2 Si 2 makes this compound a potential magnetocaloric material for applications at liquid helium temperatures.
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Research context

OpenAlex topics: Magnetic and transport properties of perovskites and related materials · Rare-earth and actinide compounds · Magnetic Properties of Alloys

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Materials Science and Engineering, Key Laboratory of Advanced Materials and Devices for Post-Moore Chips Ministry of Education, University of Science and Technology Beijing, Beijing 100083, China

Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences & University of Chinese Academy of Sciences, Beijing 100190, China

Anhui Key Laboratory of Magnetic Functional Materials and Devices, School of Materials Science and Engineering, Anhui University, Hefei 230601, China

Spallation Neutron Source Science Center, Dongguan 523803, China

Songshan Lake Materials Laboratory, Dongguan 523808, China

NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg 20899, United States

Department of Physics, Beijing Technology and Business University, Beijing 100048, China

Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China

Funding

National Key Research and Development Program of China · National Natural Science Foundation of China · Science Center of the National Science Foundation of China

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