Large reversible magnetocaloric effect in HoMn2O5

doi:10.1088/1674-1056/22/5/057502

中国物理B ›› 2013, Vol. 22 ›› Issue (5): 57502-057502.doi: 10.1088/1674-1056/22/5/057502

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

Large reversible magnetocaloric effect in HoMn₂O₅

葛恒^{a b}, 张向群^b, 柯亚娇^b, 靳金玲^b, 廖志新^a, 成昭华^b

a School of Chemistry and Chemical Engineering, Southeast University, Nanjing 210009, China;
b State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

收稿日期:2012-11-25 修回日期:2013-01-10 出版日期:2013-04-01 发布日期:2013-04-01

Large reversible magnetocaloric effect in HoMn₂O₅

Ge Heng (葛恒)^{a b}, Zhang Xiang-Qun (张向群)^b, Ke Ya-Jiao (柯亚娇)^b, Jin Jin-Ling (靳金玲)^b, Liao Zhi-Xin (廖志新)^a, Cheng Zhao-Hua (成昭华)^b

a School of Chemistry and Chemical Engineering, Southeast University, Nanjing 210009, China;
b State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

Received:2012-11-25 Revised:2013-01-10 Online:2013-04-01 Published:2013-04-01
Contact: Cheng Zhao-Hua E-mail:zhcheng@iphy.ac.cn

摘要/Abstract

摘要： Magnetocaloric effect (MCE) in polycrystalline HoMn₂O₅ was investigated by isothermal magnetization curves from 2 K to 50 K. A relatively large magnetic entropy change, ΔS_M = 7.8 J/(kg·K), was achieved with the magnetic field up to 70 kOe. The magnetic entropy change is reversible in the whole range of temperature. The contributions of elastic and magnetoelastic energy to the changing of the magnetic entropy are discussed in terms of the Landau theory. The reversibility of MCE with maximal refrigerant capacity R_C = 216.7 J/kg makes polycrystalline HoMn₂O₅ be promising as a magnetic refrigerant.

关键词: HoMn₂O₅, magnetocaloric effect

Abstract: Magnetocaloric effect (MCE) in polycrystalline HoMn₂O₅ was investigated by isothermal magnetization curves from 2 K to 50 K. A relatively large magnetic entropy change, ΔS_M = 7.8 J/(kg·K), was achieved with the magnetic field up to 70 kOe. The magnetic entropy change is reversible in the whole range of temperature. The contributions of elastic and magnetoelastic energy to the changing of the magnetic entropy are discussed in terms of the Landau theory. The reversibility of MCE with maximal refrigerant capacity R_C = 216.7 J/kg makes polycrystalline HoMn₂O₅ be promising as a magnetic refrigerant.

Key words: HoMn₂O₅, magnetocaloric effect

中图分类号: (Magnetic oxides)

75.47.Lx

75.30.Sg (Magnetocaloric effect, magnetic cooling)

葛恒, 张向群, 柯亚娇, 靳金玲, 廖志新, 成昭华. Large reversible magnetocaloric effect in HoMn₂O₅[J]. 中国物理B, 2013, 22(5): 57502-057502.

Ge Heng (葛恒), Zhang Xiang-Qun (张向群), Ke Ya-Jiao (柯亚娇), Jin Jin-Ling (靳金玲), Liao Zhi-Xin (廖志新), Cheng Zhao-Hua (成昭华). Large reversible magnetocaloric effect in HoMn₂O₅[J]. Chin. Phys. B, 2013, 22(5): 57502-057502.

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Large reversible magnetocaloric effect in HoMn₂O₅

Large reversible magnetocaloric effect in HoMn₂O₅

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