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Structure and magnetism of S = 1/2 kagome antiferromagnets NiCu(3)(OH)(6)Cl(2) and CoCu(3)(OH)(6)Cl(2).
MedLine Citation:
PMID:  23186651     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
We have successfully synthesized S = 1/2 kagome antiferromagnets MCu(3)(OH)(6)Cl(2) (M = Ni and Co) by a hydrothermal method with a rotating pressure vessel. Structural characterization shows that both compounds have similar crystal structure to ZnCu(3)(OH)(6)Cl(2) with [Formula: see text] symmetry. As with ZnCu(3)(OH)(6)Cl(2), the compounds show no obvious hysteresis at 2 K. A spin-glass transition is found in both NiCu(3)(OH)(6)Cl(2) and CoCu(3)(OH)(6)Cl(2) at low temperatures (6.0 and 3.5 K respectively) by AC susceptibility measurements. This indicates no long-range magnetic order and a strong spin frustration. The substitution of Zn(2+) by magnetic ions Ni(2+) or Co(2+) effectively enhances the interlayer exchange coupling and changes the ground state of the kagome spin system.
Authors:
Yue-Sheng Li; Qing-Ming Zhang
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-28
Journal Detail:
Title:  Journal of physics. Condensed matter : an Institute of Physics journal     Volume:  25     ISSN:  1361-648X     ISO Abbreviation:  J Phys Condens Matter     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-11-28     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101165248     Medline TA:  J Phys Condens Matter     Country:  -    
Other Details:
Languages:  ENG     Pagination:  026003     Citation Subset:  -    
Affiliation:
Department of Physics, Renmin University of China, Beijing 100872, People's Republic of China.
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