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

• DOI: 10.1021/acsami.1c23313
• Publication Date: 2022-04-14T07:52:53Z
• Authors: 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
• Keywords: Magnetic refrigeration

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