Muon spin rotation studies of spin dynamics at avoided level crossings in LiY0.998Ho0.002F4
Articolo
Data di Pubblicazione:
2007
Citazione:
Muon spin rotation studies of spin dynamics at avoided level crossings in LiY0.998Ho0.002F4 / M.J. Graf, J. Lago, A. Lascialfari, A. Amato, C. Baines, S.R. Giblin, J.S. Lord, A.M. Tkachuk, B. Barbara. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 99:26(2007), pp. 267203.1-267203.4.
Abstract:
We have studied the Ho(3+) spin dynamics for LiY(0.998)Ho(0.002)F(4) 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 Ho(3+) ion system has field-induced (avoided) level crossings. The reduction scales with calculated level repulsions, suggesting that mu(+) depolarization by slow fluctuations of nonresonant Ho(3+) spin states is partly suppressed when resonant tunneling opens new fluctuation channels at frequencies much greater than the muon precession frequency.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
SR; magnetization
Elenco autori:
M.J. Graf, J. Lago, A. Lascialfari, A. Amato, C. Baines, S.R. Giblin, J.S. Lord, A.M. Tkachuk, B. Barbara
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