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Low-temperature NMR studies of Na2V3O7 by J.L. Gavilano; D. Rau; Sh. Mushkolaj; H.R. Ott; F. Mila; P. Millet is a Physics and Astronomy article available to read on EtoBox.

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We report low-temperature 23 Na-NMR measurements on the quasi-one-dimensional spin 1 2 system Na 2 V 3 O 7 : The temperature dependence of the spin-lattice relaxation rate T À1 1 ðTÞ; measured at a frequency of 76:5 MHz; exhibits a narrow peak near 2:5 K; indicating the onset of a cooperative phase transition to a state with a small gap in the spectrum of V spin excitations. Considering the results of the NMR spectra at low temperatures and of the magnetic susceptibility at higher temperatures, it seems unlikely that this transition reflects the onset of either ferromagnetic or antiferromagnetic order. The nature of the transition needs to be investigated in more detail.

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Author

J.L. Gavilano; D. Rau; Sh. Mushkolaj; H.R. Ott; F. Mila; P. Millet

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0921-4526)

Published

2003

Language

EN

Field

Physics and Astronomy (Physical Sciences)