| Autor: |
M J, Graf, J, Lago, A, Lascialfari, A, Amato, C, Baines, S R, Giblin, J S, Lord, A M, Tkachuk, B, Barbara |
| Rok vydání: |
2007 |
| Zdroj: |
Physical review letters. 99(26) |
| ISSN: |
0031-9007 |
| Popis: |
We have studied the Ho3+ spin dynamics for LiY0.998Ho0.002F4 via the positive muon (mu+) transverse field depolarization rate lambdaTF as a function of temperature and magnetic field. We find sharp minima in lambdaTF(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. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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