NMR study of lineshifts and relaxation rates of the one-dimensional antiferromagnet LiCuVO4

C. Kegler, N. Büttgen, H.-A. Krug von Nidda, A. Loidl, R. Nath, A. V. Mahajan, A. V. Prokofiev, and W. Aßmus
Phys. Rev. B 73, 104418 – Published 15 March 2006

Abstract

NMR measurements were performed on single-crystalline samples of the one-dimensional Heisenberg antiferromagnet (1D HAF) LiCuVO4. We investigated Li7 and V51 NMR spectra, deduced the respective lineshifts K(T), spin-lattice relaxation rates 1T1, and spin-spin relaxation rates 1T2 and 1T2G. The results are compared to theoretical predictions for the relaxation rates 1T1(T) and 1T2G(T) deduced from the dynamic susceptibility χ(q,ω) of a 1D HAF spin chain as proposed by Sachdev [Phys. Rev. B 50, 13006 (1994)]. We document a correspondence between the anisotropic relaxation rates derived from electron paramagnetic resonance linewidth ΔH(T) and nuclear magnetic resonance 1T1(T), respectively, the former being well described in the framework of symmetric anisotropic exchange interactions for LiCuVO4 by Krug von Nidda et al. [Phys. Rev. B 65, 134445 (2002)].

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  • Received 9 November 2005

DOI:https://doi.org/10.1103/PhysRevB.73.104418

©2006 American Physical Society

Authors & Affiliations

C. Kegler*, N. Büttgen, H.-A. Krug von Nidda, and A. Loidl

  • Experimentalphysik V, Elektronische Korrelationen und Magnetismus, Institut für Physik, Universität Augsburg, D-86135 Augsburg, Germany

R. Nath and A. V. Mahajan

  • Department of Physics, IIT Bombay, Powai Mumbai 400 076, India

A. V. Prokofiev and W. Aßmus

  • Johann Wolfgang Goethe-Universität Frankfurt, Robert-Mayer-Str. 2-4, D - 60325 Frankfurt am Main, Germany

  • *Present address: Bio-Medical Physics & Bio-Engineering, University of Aberdeen, Foresterhill, AB25 2ZD, Aberdeen, Scotland, UK.

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Issue

Vol. 73, Iss. 10 — 1 March 2006

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