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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/8575

Title: The effect of spin dilution on magnetism of the linear chain system beta-Cu(2-x)Zn(x)V(2)O(7)
Authors: BHATIA, SN
MOHAPATRA, N
NIRMALA, R
MALIK, SK
Keywords: haldane-gap
susceptibility
compound
Issue Date: 2010
Publisher: INDIAN ACAD SCIENCES
Citation: PRAMANA-JOURNAL OF PHYSICS, 74(5), 833-843
Abstract: We have measured the magnetic susceptibility (X) and heat capacity (C(p)) of beta-Cu(2-x)Zn(x)V(2)O(7) (x = 0, 0.05, 0.1, 0.15, 0.2, 0.3, 2) in the temperature range 2-300 K. A one-dimensional alternating exchange Heisenberg antiferromagnetism (HAF) is observed in all compositions with chains of infinite length. The intra-chain exchange remains uniform and decreases marginally with dilution of the magnetic state. A cooperative ordering is seen in the magnetic chains for all Zn concentrations (x <= 0.3). The temperature of occurrence of this transition decreases with increasing Zn concentration. Though the conventional spin-wave theory has been used here to describe the properties of the ordered phase, the presence of some contributions like the lattice heat capacity in C(p) and the Curie-Weiss term in susceptibility introduces some uncertainties in the estimation of the proportions contributed by the spin system. Therefore, the nature of the ordered phase could not be ascertained unambiguously.
URI: http://dspace.library.iitb.ac.in/xmlui/handle/10054/8575
http://hdl.handle.net/10054/8575
ISSN: 0304-4289
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