Two gaps in \(VO\)2P2O7: Observation using high-field magnetization and NMR

T. Yamauchi, Y. Narumi, J. Kikuchi, Y. Ueda, K. Tatani, T. C. Kobayashi, K. Kindo, K. Motoya

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40 Citations (Scopus)


The alternating one-dimensional Heisenberg S = 1/2 chain compound with spin gap, \(VO\)2P2O7, has been studied by the high-field magnetization and 31P NMR measurements. Two critical phenomena at 25+/-1 and 46+/-2 T are observed in the magnetization curve, which are considered to be a crossover between the ground state and the excited state in two kinds of gap systems. 31P NMR also revealed the coexistence of two magnetic systems with independent spin gaps. Results obtained from the present and previous studies are well explained by the model in which two kinds of magnetic chains along the b axis behave as alternating spin chains with independent gap energies.

Original languageEnglish
Pages (from-to)3729-3732
Number of pages4
JournalPhysical Review Letters
Issue number18
Publication statusPublished - Jan 1 1999
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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