NMR and μSR study of spin correlations in SrZnVO(PO4)2: An S=12 frustrated magnet on a square lattice

L. Bossoni, P. Carretta, R. Nath, M. Moscardini, M. Baenitz, and C. Geibel
Phys. Rev. B 83, 014412 – Published 13 January 2011
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P31 nuclear and muon spin-lattice relaxation-rate measurements in SrZnVO(PO4)2, a S=1/2 frustrated magnet on a square lattice, are presented. The temperature (T) dependence of the in-plane correlation length ξ is derived and it is shown that the overall behavior is analogous to the one found for nonfrustrated systems but with a reduced spin stiffness. The temperature dependence of ξ in SrZnVO(PO4)2 is compared to the one of other frustrated magnets on a square lattice with competing nearest neighbor (J1) and next-nearest-neighbor (J2) exchange couplings and it is shown that ξ progressively decreases as the ratio J2/J1 approaches the critical value leading to the suppression of long-range magnetic order. In spite of the differences in the functional form of ξ(T) found in different vanadates, it is pointed out that the characteristic energy scale describing spin correlations in all those compounds appears to scale as |2J2+J1|.

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  • Received 11 October 2010


© 2011 American Physical Society

Authors & Affiliations

L. Bossoni1, P. Carretta1, R. Nath2, M. Moscardini1, M. Baenitz3, and C. Geibel3

  • 1Department of Physics “A. Volta,” University of Pavia-CNISM, I-27100 Pavia, Italy
  • 2Indian Institute of Science Education and Research-Thiruvananthapuram, 695016 Kerala, India
  • 3Max-Planck Institute for Chemical Physics of Solids, D-01187 Dresden, Germany

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Vol. 83, Iss. 1 — 1 January 2011

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