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Magnetic properties of Heisenberg triangular antiferromagnet V15 cluster studied by NMR

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Abstract

The magnetic properties of an s = 1/2 Heisenberg triangular antiferromagnet V15 have been studied by proton nuclear magnetic resonance (NMR) at very low temperature down to 100 mK using a He3-He4 dilution refrigerator. In total spin S T = 3/2 ground state above 2.7 Tesla, proton spin-lattice relaxation rate (1/T1) shows thermally activated behavior as a function of temperature. On the other hand, a temperature independent behavior of 1/T1 at very low temperatures is observed in frustrated S T = 1/2 ground state below 2.7 Tesla. Possible origins for the peculiar behavior of 1/T1 will be discussed in terms of magnetic fluctuations due to spin frustration.

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Authors and Affiliations

  1. Division of Physics, Graduate School of Science, Hokkaido University, Sapporo, 060-0810, Japan

    Y. Furukawa, Y. Nishisaka & K. Kumagai

  2. Department of Physics and Astronomy, Ames Laboratory, Iowa State University, Ames, IA, 50011, USA

    P. Kögerler & F. Borsa

  3. Dipartimento di Fisica “A Volta” e Unita’INFM di Pavia, Via Bassi 6, 27100, Pavia, Italy

    F. Borsa

Authors
  1. Y. Furukawa
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  2. Y. Nishisaka
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  3. K. Kumagai
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  4. P. Kögerler
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  5. F. Borsa
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Corresponding author

Correspondence to Y. Furukawa.

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Furukawa, Y., Nishisaka, Y., Kumagai, K. et al. Magnetic properties of Heisenberg triangular antiferromagnet V15 cluster studied by NMR. Hyperfine Interact 176, 65–68 (2007). https://doi.org/10.1007/s10751-008-9614-z

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  • DOI: https://doi.org/10.1007/s10751-008-9614-z

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