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| 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 |
| Appears in Collections: | Article
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