| DOI | Resolve DOI: https://doi.org/10.1088/0953-8984/15/2/102 |
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| Author | Search for: Ehlers, G.; Search for: Cornelius, A. L.; Search for: Orendac, M.; Search for: Kajnakova, M.; Search for: Fennell, T.; Search for: Bramwell, S. T.; Search for: Gardner, J. S.1 |
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| Affiliation | - National Research Council of Canada
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| Format | Text, Article |
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| Abstract | 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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| Publication date | 2003 |
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| In | |
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| NPARC number | 12333560 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 5aedf9a2-5253-4742-a154-6a92e9d0e902 |
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| Record created | 2009-09-10 |
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| Record modified | 2020-04-02 |
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