Enhancement of the spin entropy in Na(x)Co(2)O(4) by Ni doping

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	Enhancement of the spin entropy in Na(x)Co(2)O(4) by Ni doping
	G. D. Tang; T. Yang; X. N. Xu; C. P. Tang; L. Qiu; Z. D. Zhang; L. Y. Lv; Z. H. Wang; Y. W. Du
	2010
发表期刊	Applied Physics Letters
ISSN	0003-6951
卷号	97 期号:3
摘要	The effects of Ni doping on the spin entropy in Na(x)Co(2)O(4) (x=1.2) has been carefully studied. A strong magnetic-field suppression of the thermopower indicates the emergence of large spin-entropy effect. The magnetothermopower increases with increasing Ni doping level, suggesting that Ni doping improves the spin entropy of Na(x)Co(2)O(4). Based on analysis of x-ray absorption spectra, we propose a spin-entropy competition mechanism to explain well the spin-entropy enhancement. (C) 2010 American Institute of Physics. [doi:10.1063/1.3467205]
部门归属	[tang, guodong; xu, xiaonong; tang, chipui; qiu, li; lv, liya; wang, zhihe; du, youwei] nanjing univ, natl lab solid state microstruct, dept phys, nanjing 210093, peoples r china. [yang, teng; zhang, zhidong] chinese acad sci, inst met res, natl lab mat sci, shenyang 110016, peoples r china. [yang, teng; zhang, zhidong] chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china.;tang, gd (reprint author), nanjing univ, natl lab solid state microstruct, dept phys, nanjing 210093, peoples r china;zhwang@nju.edu.cn
关键词	Doping Profiles Entropy Magnetocaloric Effects Nickel Sodium Compounds Spin Dynamics X-ray Absorption Spectra Thermopower
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/31469
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	G. D. Tang,T. Yang,X. N. Xu,et al. Enhancement of the spin entropy in Na(x)Co(2)O(4) by Ni doping[J]. Applied Physics Letters,2010,97(3).
APA	G. D. Tang.,T. Yang.,X. N. Xu.,C. P. Tang.,L. Qiu.,...&Y. W. Du.(2010).Enhancement of the spin entropy in Na(x)Co(2)O(4) by Ni doping.Applied Physics Letters,97(3).
MLA	G. D. Tang,et al."Enhancement of the spin entropy in Na(x)Co(2)O(4) by Ni doping".Applied Physics Letters 97.3(2010).