Magnetic properties and large magnetocaloric effects of GdPd intermetallic compound
来源期刊：Journal of Rare Earths2018年第10期
论文作者：Jianjun Huo Yusong Du Gang Cheng Xiaofei Wu Lei Ma Jiang Wang Zhengcai Xia Guanghui Rao
文章页码：1044 - 1049
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(μeff)are determined to be 34.7 K and 8.12 μB/Gd,respectively. The maximum entropy change(|△SMMax|) 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.
Jianjun Huo1，Yusong Du1,2，Gang Cheng1,2，Xiaofei Wu1,2，Lei Ma1,2，Jiang Wang1,2，Zhengcai Xia3,4，Guanghui Rao1,2
1. School of Materials Science and Engineering,Guilin University of Electronic Technology2. Guangxi Key Laboratory of Information Materials3. School of Physics, Huazhong University of Science and Technology4. Wuhan National High Magnetic Field Center,Huazhong University of Science and Technology
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(μeff)are determined to be 34.7 K and 8.12 μB/Gd,respectively. The maximum entropy change(|△SMMax|) 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.
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