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Chin. Phys. B, 2013, Vol. 22(5): 057502    DOI: 10.1088/1674-1056/22/5/057502
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

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
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, ΔSM = 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 RC = 216.7 J/kg makes polycrystalline HoMn2O5 be promising as a magnetic refrigerant.
Keywords:  HoMn2O5      magnetocaloric effect  
Received:  25 November 2012      Revised:  10 January 2013      Accepted manuscript online: 
PACS:  75.47.Lx (Magnetic oxides)  
  75.30.Sg (Magnetocaloric effect, magnetic cooling)  
Corresponding Authors:  Cheng Zhao-Hua     E-mail:  zhcheng@iphy.ac.cn

Cite this article: 

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 2013 Chin. Phys. B 22 057502

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