Giant anisotropy of magnetocaloric effect in TbMnO3 single crystals

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	Giant anisotropy of magnetocaloric effect in TbMnO3 single crystals
	Jin, JL ; Zhang, XQ ; Li, GK ; Cheng, ZH ; Zheng, L ; Lu, Y
刊名	PHYSICAL REVIEW B
	2011
卷号	83 期号:18
关键词	MANGANITES TRANSITION ALLOYS
ISSN号	1098-0121
通讯作者	Cheng, ZH: Chinese Acad Sci, Inst Phys, State Key Lab Magnetism, Beijing 100190, Peoples R China.
中文摘要	The magnetocaloric effect (MCE) in TbMnO3 single crystals was investigated by isothermal magnetization curves for the ab plane at low temperatures. Large magnetic entropy change, Delta S-M = -18.0 J/kg K, and the refrigerant capacity, RC = 390.7 J/kg, are achieved near the ordering temperature of Tb3+ moment (T-N(Tb)) under 70 kOe along the a axis. Furthermore, the TbMnO3 single crystal exhibits a giant MCE anisotropy. The difference of Delta S-M and RC between the a and b axes is field and temperature dependent, which reaches maximum values of 11.4 J/kg K and 304.1 J/kg, respectively. By taking magnetocrystalline anisotropy into account, the rotating Delta S-M within the ab plane can be well simulated, indicating that the anisotropy of Delta S-M is directly contributed from the magnetocrystalline anisotropy. Our finding for giant MCE anisotropy in TbMnO3 single crystals explores the possibility of using this material for magnetic refrigerators by rotating its magnetization vector rather than moving it in and out of the magnet.
收录类别	SCI
资助信息	National Basic Research Program of China (973 program) [2009CB929201, 2010CB934202, 2011CB921801]; National Natural Sciences Foundation of China [50831006, 50931006, 51021061, 11034004]
语种	英语
公开日期	2013-09-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/38718]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Jin, JL,Zhang, XQ,Li, GK,et al. Giant anisotropy of magnetocaloric effect in TbMnO3 single crystals[J]. PHYSICAL REVIEW B,2011,83(18).
APA	Jin, JL,Zhang, XQ,Li, GK,Cheng, ZH,Zheng, L,&Lu, Y.(2011).Giant anisotropy of magnetocaloric effect in TbMnO3 single crystals.PHYSICAL REVIEW B,83(18).
MLA	Jin, JL,et al."Giant anisotropy of magnetocaloric effect in TbMnO3 single crystals".PHYSICAL REVIEW B 83.18(2011).