# Magnetic properties of Heisenberg triangular antiferromagnet V15 cluster studied by NMR

Title | Magnetic properties of Heisenberg triangular antiferromagnet V15 cluster studied by NMR |

Publication Type | Journal Article |

Year of Publication | 2007 |

Authors | Furukawa Y, Nishisaka Y, Kumagai K, Kogerler P, Borsa F |

Journal Title | Hyperfine Interactions |

Volume | 176 |

Pages | 65-68 |

Date Published | Apr |

Type of Article | Proceedings Paper |

ISBN Number | 0304-3843 |

Accession Number | ISI:000259462700011 |

Keywords | excitations, nanoscale molecular magnets, nmr, spin frustration, V-15 |

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 He-3-He-4 dilution refrigerator. In total spin S-T=3/2 ground state above 2.7 Tesla, proton spin-lattice relaxation rate (1/T-1) shows thermally activated behavior as a function of temperature. On the other hand, a temperature independent behavior of 1/T-1 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/T-1 will be discussed in terms of magnetic fluctuations due to spin frustration. |

DOI | 10.1007/s10751-008-9614-z |

Alternate Journal | Hyperfine Interact. |