Hyperfine Interactions

, Volume 176, Issue 1, pp 65–68

Magnetic properties of Heisenberg triangular antiferromagnet V15 cluster studied by NMR

  • Y. Furukawa
  • Y. Nishisaka
  • K. Kumagai
  • P. Kögerler
  • F. Borsa
Article

DOI: 10.1007/s10751-008-9614-z

Cite this article as:
Furukawa, Y., Nishisaka, Y., Kumagai, K. et al. Hyperfine Interact (2007) 176: 65. doi:10.1007/s10751-008-9614-z

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 ST = 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 ST = 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.

Keywords

Spin frustration Nanoscale molecular magnets NMR 

Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  • Y. Furukawa
    • 1
  • Y. Nishisaka
    • 1
  • K. Kumagai
    • 1
  • P. Kögerler
    • 2
  • F. Borsa
    • 2
    • 3
  1. 1.Division of Physics, Graduate School of ScienceHokkaido UniversitySapporoJapan
  2. 2.Department of Physics and Astronomy, Ames LaboratoryIowa State UniversityAmesUSA
  3. 3.Dipartimento di Fisica “A Volta” e Unita’INFM di PaviaPaviaItaly

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