Spin-glass behavior and magnetocaloric effect in melt-spun TbCuAl alloys

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	Spin-glass behavior and magnetocaloric effect in melt-spun TbCuAl alloys
	Dong, QY ; Shen, BG ; Chen, J ; Shen, J ; Sun, JR
刊名	SOLID STATE COMMUNICATIONS
	2011
卷号	151 期号:2 页码:112
关键词	SYSTEM SUSCEPTIBILITY TRANSITION ORDER MODEL TB
ISSN号	0038-1098
通讯作者	Dong, QY (reprint author), Capital Normal Univ, Dept Phys, Beijing 100048, Peoples R China.
中文摘要	Magnetic properties and magnetocaloric effects of amorphous and crystalline TbCuAl ribbons are investigated by measuring their ac susceptibilities including a nonlinear term and dc magnetizations. The in-phase third harmonic ac susceptibility chi(3)' is found to be negative. It can be well fitted by the expression chi'(3) = tau epsilon(gamma)(3) at high temperatures, indicating a spin-glass behavior in amorphous TbCuAl alloy. Delta T(f)(omega)/[T(f)(omega)Delta log(10)omega], a possible distinguishing criterion to judge the presence of a spin-glass behavior is similar to 0.011. The frequency-dependent data can be well fitted by the conventional critical slowing down law and the spin-glass transition temperature is obtained to be 20.1 K. The maximum of magnetic entropy change reaches 4.5 J kg(-1) K(-1) for a field change of 0-50 000 Oe, while the crystalline TbCuAl compound experiences a simple ferromagnetic-to-paramagnetic phase transition. The peak value of magnetic entropy change is obtained at the Curie temperature and reaches 14.4 J kg(-1) K(-1) for the same field change, which is much larger than that of amorphous TbCuAl alloy. (C) 2010 Elsevier Ltd. All rights reserved.
收录类别	SCI
资助信息	National Natural Science Foundation of China [50731007, 51001077]; National Basic Research Program of China [2006CB601101]; Chinese Academy of Sciences; Key Laboratory of CryogenicsTechnical Institute of Physics and Chemistry, Chinese Academy of Sciences
语种	英语
公开日期	2013-09-24
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/52928]
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	Dong, QY,Shen, BG,Chen, J,et al. Spin-glass behavior and magnetocaloric effect in melt-spun TbCuAl alloys[J]. SOLID STATE COMMUNICATIONS,2011,151(2):112.
APA	Dong, QY,Shen, BG,Chen, J,Shen, J,&Sun, JR.(2011).Spin-glass behavior and magnetocaloric effect in melt-spun TbCuAl alloys.SOLID STATE COMMUNICATIONS,151(2),112.
MLA	Dong, QY,et al."Spin-glass behavior and magnetocaloric effect in melt-spun TbCuAl alloys".SOLID STATE COMMUNICATIONS 151.2(2011):112.