[Zurück]

C. Kegler, N. Büttgen, H.A. Krug von Nidda, A. Loidl, R. Nath, A. Mahajan, A. Prokofiev, W. Assmus:
"NMR study of lineshifts and relaxation rates of the one-dimensional antiferromagnet LiCuVO₄";
Physical Review B, 73 (2006), S. 104418-1 - 104418-8.

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

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

(Received 9 November 2005; published 15 March 2006)

NMR measurements were performed on single-crystalline samples of the one-dimensional Heisenberg antiferromagnet (1D HAF) LiCuVO4. We investigated 7Li and 51V NMR spectra, deduced the respective lineshifts K(T), spin-lattice relaxation rates 1/T1, and spin-spin relaxation rates 1/T2 and 1/T2G. The results are compared to theoretical predictions for the relaxation rates 1/T1(T) and 1/T2G(T) deduced from the dynamic susceptibility chi(q,omega) 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 DeltaH(T) and nuclear magnetic resonance 1/T1(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)].

©2006 The American Physical Society

URL: http://link.aps.org/abstract/PRB/v73/e104418

doi:10.1103/PhysRevB.73.104418

PACS: 76.60.-k, 75.10.Pq, 76.30.-v, 75.40.Cx

http://aleph.ub.tuwien.ac.at/F?base=tuw01&func=find-c&ccl_term=AC06588108

http://link.aps.org/abstract/PRB/v73/e104418