Muon spin rotation studies of spin dynamics at avoided level crossings in LiY0.998Ho0.002F4 (Articolo in rivista)

Type
Label
  • Muon spin rotation studies of spin dynamics at avoided level crossings in LiY0.998Ho0.002F4 (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Alternative label
  • Graf, MJ; Lago, J; Lascialfari, A; Amato, A; Baines, C; Giblin, SR; Lord, JS; Tkachuk, AM; Barbara, B (2007)
    Muon spin rotation studies of spin dynamics at avoided level crossings in LiY0.998Ho0.002F4
    in Physical review letters (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Graf, MJ; Lago, J; Lascialfari, A; Amato, A; Baines, C; Giblin, SR; Lord, JS; Tkachuk, AM; Barbara, B (literal)
Pagina inizio
  • 267203 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 99 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Boston Coll, Dept Phys, Chestnut Hill, MA 02467 USA; Univ Pavia, Dept Phys A Volta, I-27100 Pavia, Italy; INFM, CNR, I-27100 Pavia, Italy; Univ Milan, Inst Gen Physiol & Biol Chem, I-20134 Milan, Italy; S3 CNR INFM, I-41100 Modena, Italy; Paul Scherrer Inst, CH-5232 Villigen, Switzerland; Rutherford Appleton Lab, Chilton Didcot OX11 0QX, Oxon, England; St Petersburg State Univ Informat Technol Mech &, St Petersburg 199034, Russia; Inst Neel, CNRS, Dept Nanosci, F-38042 Grenoble 09, France (literal)
Titolo
  • Muon spin rotation studies of spin dynamics at avoided level crossings in LiY0.998Ho0.002F4 (literal)
Abstract
  • We have studied the Ho3+ spin dynamics for LiY0.998Ho0.002F4 via the positive muon (mu(+)) transverse field depolarization rate lambda(TF) as a function of temperature and magnetic field. We find sharp minima in lambda(TF)(H) at fields for which the Ho3+ ion system has field-induced (avoided) level crossings. The reduction scales with calculated level repulsions, suggesting that mu(+) depolarization by slow fluctuations of nonresonant Ho3+ spin states is partly suppressed when resonant tunneling opens new fluctuation channels at frequencies much greater than the muon precession frequency. (literal)
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