V 51 NMR study of the spin-gap compound BiCu2 VO6: A microscopic probe of magnetic interactions

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Abstract

We report the results of a V 51 nuclear-magnetic-resonance (NMR) study on the quasi-one-dimensional compound BiCu2 VO6 at temperatures between 4 and 300 K. Three V 51 NMR resonance lines that are associated with three nonequivalent crystallographic sites have been resolved. For each vanadium site, the temperature-dependent NMR shift exhibits a character of low-dimensional magnetism with a broad maximum. At low temperatures, all NMR shifts and spin-lattice relaxation rates clearly indicate thermally activated behavior, confirming the spin-gap formation in BiCu2 VO6. We further analyze the spin shift data based on a proposed spin-ladder scenario with three different types of interactions along the rungs. With this accordance, the spin gaps and the couplings along the rungs of the ladder are properly estimated.

Original languageEnglish
Article number092407
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume80
Issue number9
DOIs
Publication statusPublished - 2009 Sep 25

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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