| DOI | Trouver le DOI : https://doi.org/10.1088/0953-8984/15/2/102 |
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| Auteur | Rechercher : Ehlers, G.; Rechercher : Cornelius, A. L.; Rechercher : Orendac, M.; Rechercher : Kajnakova, M.; Rechercher : Fennell, T.; Rechercher : Bramwell, S. T.; Rechercher : Gardner, J. S.1 |
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| Affiliation | - Conseil national de recherches Canada
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| Format | Texte, Article |
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| Résumé | The magnetic dynamics of the spin ice material Ho2Ti2O7 in its paramagnetic ('hot') phase have been investigated by a combination of neutron spin echo and ac-susceptibility techniques. Relaxation at high temperatures (T > 15 K) is proved to occur by a thermally activated single-ion process that is distinct from the process that dominates at lower temperatures (1 K < T < 15 K). It is argued that the low-temperature process must involve quantum mechanical spin tunnelling, as quasi-classical channels of relaxation are exhausted in this temperature range. Our results resolve a mystery in the physics of spin ice: why has a 15 K ac-susceptibility peak been observed in Dy2Ti2O7 but not in Ho2Ti2O7 or Ho2Sn2O7? |
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| Date de publication | 2003 |
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| Dans | |
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| Numéro NPARC | 12333560 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | 5aedf9a2-5253-4742-a154-6a92e9d0e902 |
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| Enregistrement créé | 2009-09-10 |
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| Enregistrement modifié | 2020-04-02 |
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