DataVXACS Applied Materials & InterfacesPaper
journal article·2022-04-27

Enhanced Performance of ΔTad upon Frequent Alternating Magnetic Fields in FeRh Alloys by Introducing Second Phases

Kaiming Qiao, Jianlin Wang, Shulan Zuo, Houbo Zhou, Jiazheng Hao, Yao Liu, Fengxia Hu, Hu Zhang, Adler G. Gamzatov, Akhmed Aliev, Cheng Zhang, Jia Li, Zibing Yu, Yihong Gao, Feiran Shen, Rongchang Ye, Yi Long, Xuedong Bai, Jing Wang, Jirong Sun, Rongjin Huang, Tongyun Zhao, Baogen Shen

ACS Applied Materials & Interfaces· Volume 14· Issue 16
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Source abstract

Abstract

The cyclability and frequency dependence of the adiabatic temperature change (ΔTad) under an alternating magnetic field (AMF) are significantly important from the viewpoint of refrigeration application. Our studies demonstrated, by direct measurements, that the cyclability and low-magnetic-field performance of ΔTad in FeRh alloys can be largely enhanced by introducing second phases. The ΔTad under a 1.8 T, 0.13 Hz AMF is reduced by 14%, which is much better than that (40–50%) of monophase FeRh previously reported. More importantly, the introduction of second phases enables the antiferromagnetic–ferromagnetic phase transition to be driven by a lower magnetic field. Thus, ΔTad is significantly enhanced under a 0.62 T, 1 Hz AMF, and its value is 70% larger than that of monophase FeRh previously reported. Although frequency dependence of ΔTad occurs, the specific cooling power largely increases by 11 times from 0.17 to 1.9 W/g, as the frequency increases from 1 to 18.4 Hz under an AMF of 0.62 T. Our analysis of the phase transition dynamics based on magnetic relaxation measurements indicates that the activation energy barrier is lowered owing to the existence of second phases in FeRh alloys, which should be responsible for the reduction of the driving field. This work provides an effective way to enhance the cyclability and low-magnetic-field performance of ΔTad under an AMF in FeRh alloys by introducing second phases.
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Research context

Metals & alloys

OpenAlex topics: Magnetic and transport properties of perovskites and related materials · Magnetic Properties of Alloys · Magnetic Properties and Applications

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

Affiliations

School of Materials Science and Engineering, University of Science and Technology of Beijing, Beijing 100083, P. R. China

Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, P. R. China

School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, P. R. China

School of Materials Science and Engineering, Beihang University, Beijing 100191, P. R. China

Frontier Institute of Science and Technology, State Key Laboratory for Mechanical Behavior of Materials, and MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi’an Jiaotong University, Xi’an 710054, P. R. China

Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, P. R. China

Amirkhanov Institute of Physics of DFRC of RAS, Makhachkala 367003, Russia

Fujian Innovation Academy, Chinese Academy of Sciences, Fuzhou, Fujian 350108, P. R. China

Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China

Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou, Jiangxi 341000, P. R. China

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

Funding

Ministry of Science and Technology of the People's Republic of China · China Postdoctoral Science Foundation · Russian Foundation for Basic Research · National Natural Science Foundation of China · Chinese Academy of Sciences

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