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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/1241

Title: Universal behavior of spinless defects in the Haldane chain Y 2Ba(Ni,Zn)O5: A study via bulk (squid) and local (NMR) probes
Authors: DAS, J
MAHAJAN, AV
BOBROFF, J
ALLOUL, H
Keywords: magnetic susceptibility
magnetometers
ground states
defects
impurities
Issue Date: 2004
Publisher: Elsevier
Citation: Journal of Magnetism and Magnetic Materials 272-276(1), e693-e694
Abstract: Spinless-impurity induced magnetic effects in Y2Ba(Ni,Zn)O5 have been probed via susceptibility and 89Y NMR. 89Y NMR spectra of these samples contain multiple peaks, as a consequence of impurity-induced excitations. Here, the T-dependence of the impurity-induced magnetization is consistent with a net “effective” spin S≈0.4 on either side of the Zn-impurity in the one-dimensional chain. Further, 89Y NMR experiments with (Y1−yCay)2BaNi1−xZnxO5, indicate a non-interacting behavior of the hole (introduced due to Ca doping) and S=0 impurity.
URI: 10.1016/j.jmmm.2003.11.341
http://hdl.handle.net/10054/1241
http://dspace.library.iitb.ac.in/xmlui/handle/10054/1241
ISSN: 0304-8853
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