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Structural transition, electrical and magnetic properties of the B-site Co doped Sr14Cu24O41 compounds
Wang, Jun1,2; Lin, Ying1; Zou, Huamin1,2; Pu, Shizhou1,2; Shi, Jing1,3
Corresponding AuthorZou, Huamin(hmzou@whu.edu.cn)
2009-02-18
Source PublicationJOURNAL OF PHYSICS-CONDENSED MATTER
ISSN0953-8984
Volume21Issue:7Pages:10
AbstractThe 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.
Funding OrganizationNational Natural Science Foundation of China
DOI10.1088/0953-8984/21/7/075601
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[10674105] ; National Natural Science Foundation of China[50471028]
WOS Research AreaPhysics
WOS SubjectPhysics, Condensed Matter
WOS IDWOS:000262897300017
PublisherIOP PUBLISHING LTD
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/97258
Collection中国科学院金属研究所
Corresponding AuthorZou, Huamin
Affiliation1.Wuhan Univ, Dept Phys, Minist Educ, Key Lab Acoust & Photon Mat & Devices, Wuhan 430072, Peoples R China
2.Wuhan Univ, Ctr Electron Microscopy, Wuhan 430072, Peoples R China
3.Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110015, Peoples R China
Recommended Citation
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.
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