Abstract
We have measured the magnetic susceptibility (χ) and heat capacity (C p) of β-Cu2−x Zn x V2O7 (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.
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Bhatia, S.N., Mohapatra, N., Nirmala, R. et al. The effect of spin dilution on magnetism of the linear chain system β-Cu2−x Zn x V2O7 . Pramana - J Phys 74, 833–843 (2010). https://doi.org/10.1007/s12043-010-0103-y
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DOI: https://doi.org/10.1007/s12043-010-0103-y