Structural transition, electrical and magnetic properties of the B-site Co doped Sr14Cu24O41 compounds

doi:10.1088/0953-8984/21/7/075601

CORC > 金属研究所 > 中国科学院金属研究所

	Structural transition, electrical and magnetic properties of the B-site Co doped Sr14Cu24O41 compounds
	Wang, Jun 2,3; Lin, Ying 2; Zou, Huamin 2,3; Pu, Shizhou 2,3; Shi, Jing 1,2
刊名	JOURNAL OF PHYSICS-CONDENSED MATTER
	2009-02-18
卷号	21 期号:7 页码:10
ISSN号	0953-8984
DOI	10.1088/0953-8984/21/7/075601
通讯作者	Zou, Huamin(hmzou@whu.edu.cn)
英文摘要	The effect of Co substitution for Cu on the structure and physical properties of Sr-14(Cu1-xCox)(24)O-41 compounds was studied by analyzing the selected-area electron diffraction and convergent-beam electron diffraction patterns, and by measuring the magnetic susceptibility, the electrical resistivity and Raman spectra. It is found that the space group of the CuO2 chain is changed from Amma to Ammm upon Co doping, but the structure of the Cu2O3 ladder remains unchanged. This indicates that the displacement between two neighboring CuO2 chains has disappeared due to Co doping. Once a small amount of Co ions are doped into the compound, exceptional changes in the Weiss temperature and in the number of dimers occur. The remarkable increase in the absolute value of the Weiss temperature indicates that the antiferromagnetic interaction in CuO2 chains becomes very strong due to Co doping. The increase in the Curie coefficient and the number of dimers implies that the Co doping causes Zhang-Rice singlets in the chains to be decoupled into free spins Cu2+ and holes. Then, the free spins Cu2+ are coupled into dimers, and the holes transfer from chains to ladders, which causes the resistivity to decrease when the Co dopant concentration is low (x < 0.10). When the Co dopant concentration is high ( x > 0.10), some Co ions are directly substituted for the Cu ions in the ladders, which results in an increase in resistivity with increasing Co dopant content.
资助项目	National Natural Science Foundation of China[10674105] ; National Natural Science Foundation of China[50471028]
WOS研究方向	Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000262897300017
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/97257]
专题	金属研究所_中国科学院金属研究所
通讯作者	Zou, Huamin
作者单位	1.Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110015, Peoples R China 2.Wuhan Univ, Dept Phys, Minist Educ, Key Lab Acoust & Photon Mat & Devices, Wuhan 430072, Peoples R China 3.Wuhan Univ, Ctr Electron Microscopy, Wuhan 430072, Peoples R China
推荐引用方式 GB/T 7714	Wang, Jun,Lin, Ying,Zou, Huamin,et al. Structural transition, electrical and magnetic properties of the B-site Co doped Sr14Cu24O41 compounds[J]. JOURNAL OF PHYSICS-CONDENSED MATTER,2009,21(7):10.
APA	Wang, Jun,Lin, Ying,Zou, Huamin,Pu, Shizhou,&Shi, Jing.(2009).Structural transition, electrical and magnetic properties of the B-site Co doped Sr14Cu24O41 compounds.JOURNAL OF PHYSICS-CONDENSED MATTER,21(7),10.
MLA	Wang, Jun,et al."Structural transition, electrical and magnetic properties of the B-site Co doped Sr14Cu24O41 compounds".JOURNAL OF PHYSICS-CONDENSED MATTER 21.7(2009):10.