Magnetic properties and large magnetocaloric effects of GdPd intermetallic compound  

作　　者：Jianjun Huo Yusong Du Gang Cheng Xiaofei Wu Lei Ma Jiang Wang Zhengcai Xia Guanghui Rao 

机构地区：[1]School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China [2]Guangxi Key Laboratory of Information Materials, Guilin 541004, China [3]School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China [4]Wuhan National High Magnetic Field Center, Huazhong University of Science and Technoogy, Wuhan 430074, China

出　　处：《Journal of Rare Earths》2018年第10期1044-1049,共6页稀土学报（英文版）

基　　金：Project supported by the National Basic Research Program of China(2014CB643703);the National Key Research and Development Program of China(2016YFB0700901);the National Natural Science Foundation of China(51261004,51461012)

摘　　要：With the intention to explore excellent magnetocaloric materials, the intermetallic compound GdPd was synthesized by arc melting and heat treatment. The microstructure, magnetic and magnetocaloric properties of the intermetallic compound of GdPd were investigated by X-ray diffraction（XRD）, scanning electron microscopy（SEM） and the physical property measurement system（PPMS）. A large reversible magnetocaloric effect is observed in GdPd accompanied by a second order magnetic phase transition from paramagnetism to ferromagnetism at ～39 K. The paramagnetic Curie temperature（θp） and the effective magnetic moment（μ（eff））are determined to be 34.7 K and 8.12 μB/Gd,respectively. The maximum entropy change（｜△SM（Max）｜） and the relative cooling power（RCP） under a field change of 5 T are estimated to be 20.14 J/（kg·K） and 433 J/kg, respectively. The giant reversible magnetocaloric effects（both the large△SM and the high RCP） together with the absence of thermal and field hysteresis make the GdPd compound an attractive candidate for low-temperature magnetic refrigeration.With the intention to explore excellent magnetocaloric materials, the intermetallic compound GdPd was synthesized by arc melting and heat treatment. The microstructure, magnetic and magnetocaloric properties of the intermetallic compound of GdPd were investigated by X-ray diffraction（XRD）, scanning electron microscopy（SEM） and the physical property measurement system（PPMS）. A large reversible magnetocaloric effect is observed in GdPd accompanied by a second order magnetic phase transition from paramagnetism to ferromagnetism at ～39 K. The paramagnetic Curie temperature（θp） and the effective magnetic moment（μ（eff））are determined to be 34.7 K and 8.12 μB/Gd,respectively. The maximum entropy change（｜△SM（Max）｜） and the relative cooling power（RCP） under a field change of 5 T are estimated to be 20.14 J/（kg·K） and 433 J/kg, respectively. The giant reversible magnetocaloric effects（both the large△SM and the high RCP） together with the absence of thermal and field hysteresis make the GdPd compound an attractive candidate for low-temperature magnetic refrigeration.

关 键 词：CdPd compound Magnetocaloric effect Magnetic entropy change Magnetic refrigeration material Rare earths 

分 类 号：TG132.27[一般工业技术—材料科学与工程]