中国物理B ›› 2019, Vol. 28 ›› Issue (5): 57502-057502.doi: 10.1088/1674-1056/28/5/057502

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Magnetic properties and magnetocaloric effects in (Ho1-xYx)5Pd2 compounds

X F Wu(武小飞), C P Guo(郭翠萍), G Cheng(成钢), C R Li(李长荣), J Wang(王江), Y S Du(杜玉松), G H Rao(饶光辉), Z M Du(杜振民)   

  1. 1 School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;
    2 School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China;
    3 Guangxi Key Laboratory of Information Materials, Guilin 541004, China
  • 收稿日期:2018-12-26 修回日期:2019-02-09 出版日期:2019-05-05 发布日期:2019-05-05
  • 通讯作者: C P Guo, Y S Du E-mail:cpguo@ustb.edu.cn;duyusong@guet.edu.cn
  • 基金资助:

    Project supported by the National Basic Research Program of China (Grant No. 2014CB643703), the National Key Research and Development Program of China (Grant No. 2016YFB0700901), the National Natural Science Foundation of China (Grant Nos. 51261004 and 51761007), and Guangxi Natural Science Foundation, China (Grant No. 2018GXNSFAA294051).

Magnetic properties and magnetocaloric effects in (Ho1-xYx)5Pd2 compounds

X F Wu(武小飞)1,2,3, C P Guo(郭翠萍)1, G Cheng(成钢)2,3, C R Li(李长荣)1, J Wang(王江)2,3, Y S Du(杜玉松)2,3, G H Rao(饶光辉)2,3, Z M Du(杜振民)1   

  1. 1 School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;
    2 School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China;
    3 Guangxi Key Laboratory of Information Materials, Guilin 541004, China
  • Received:2018-12-26 Revised:2019-02-09 Online:2019-05-05 Published:2019-05-05
  • Contact: C P Guo, Y S Du E-mail:cpguo@ustb.edu.cn;duyusong@guet.edu.cn
  • Supported by:

    Project supported by the National Basic Research Program of China (Grant No. 2014CB643703), the National Key Research and Development Program of China (Grant No. 2016YFB0700901), the National Natural Science Foundation of China (Grant Nos. 51261004 and 51761007), and Guangxi Natural Science Foundation, China (Grant No. 2018GXNSFAA294051).

摘要:

The crystal structure, magnetic and magnetocaloric properties of (Ho1-xYx)5Pd2 (x=0, 0.25, and 0.5) compounds are investigated. All the compounds crystallize in a cubic Dy5Pd2-type structure with the space group Fd3m and undergo a second order transition from spin glass (SG) state to paramagnetic (PM) state. The spin glass transition temperatures Tg decrease from 26 K for x=0 to 13 K for x=0.5. In the PM region, the reciprocal susceptibilities for all the compounds obey the Curie-Weiss law. The paramagnetic Curie temperatures (θp) for Ho5Pd2, (Ho0.75Y0.25)5Pd2, and (Ho0.5Y0.5)5Pd2 are determined to be 32 K, 30 K, and 22 K, respectively, and the corresponding effective magnetic moments (μeff) are 10.8 μB/Ho, 10.3 μB/RE, and 7.5 μB/RE, respectively. Magnetocaloric effect (MCE) is anticipated according to the Maxwell relation, based on the isothermal magnetization curves. For a magnetic field change of 0-5 T, the maximum values of the isothermal magnetic entropy change -ΔSM of the (Ho1-xYx)5Pd2 (x=0, 0.25, and 0.5) compounds are determined to be 11.5 J·kg-1·K-1, 11.1 J·kg-1·K-1, and 8.9 K J·kg-1·K-1, with corresponding refrigerant capacity values of 382.3 J·kg-1, 336.2 J·kg-1, and 242.5 J·kg-1, respectively.

关键词: (Ho1-xYx)5Pd2 compounds, magnetic transition, magnetocaloric effect

Abstract:

The crystal structure, magnetic and magnetocaloric properties of (Ho1-xYx)5Pd2 (x=0, 0.25, and 0.5) compounds are investigated. All the compounds crystallize in a cubic Dy5Pd2-type structure with the space group Fd3m and undergo a second order transition from spin glass (SG) state to paramagnetic (PM) state. The spin glass transition temperatures Tg decrease from 26 K for x=0 to 13 K for x=0.5. In the PM region, the reciprocal susceptibilities for all the compounds obey the Curie-Weiss law. The paramagnetic Curie temperatures (θp) for Ho5Pd2, (Ho0.75Y0.25)5Pd2, and (Ho0.5Y0.5)5Pd2 are determined to be 32 K, 30 K, and 22 K, respectively, and the corresponding effective magnetic moments (μeff) are 10.8 μB/Ho, 10.3 μB/RE, and 7.5 μB/RE, respectively. Magnetocaloric effect (MCE) is anticipated according to the Maxwell relation, based on the isothermal magnetization curves. For a magnetic field change of 0-5 T, the maximum values of the isothermal magnetic entropy change -ΔSM of the (Ho1-xYx)5Pd2 (x=0, 0.25, and 0.5) compounds are determined to be 11.5 J·kg-1·K-1, 11.1 J·kg-1·K-1, and 8.9 K J·kg-1·K-1, with corresponding refrigerant capacity values of 382.3 J·kg-1, 336.2 J·kg-1, and 242.5 J·kg-1, respectively.

Key words: (Ho1-xYx)5Pd2 compounds, magnetic transition, magnetocaloric effect

中图分类号:  (Rare earth metals and alloys)

  • 71.20.Eh
75.30.Kz (Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.)) 75.30.Sg (Magnetocaloric effect, magnetic cooling)