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Proton-irradiation-induced anomaly in the electrical conductivity of a hydrogen-bonded ferroelastic system
- Authors
- Kim, Se-Hun; Lee, Kyu Won; Lee, Kwang-Sei; Lee, Cheol Eui
- Issue Date
- 11월-2009
- Publisher
- AMER PHYSICAL SOC
- Keywords
- chemical shift; electrical conductivity; ferroelastic transitions; nuclear magnetic resonance; proton effects; spin-spin relaxation; thallium compounds
- Citation
- PHYSICAL REVIEW B, v.80, no.17
- Indexed
- SCIE
SCOPUS
- Journal Title
- PHYSICAL REVIEW B
- Volume
- 80
- Number
- 17
- ISSN
- 2469-9950
- Abstract
- An anomalous abrupt drop in the electrical conductivity has been observed at the ferroelastic phase transition of a proton-irradiated system of hydrogen-bonded TlH2PO4. As a result of the high-resolution P-31 NMR chemical-shift measurements, distinct changes in the atomic displacements due to the irradiation were identified in the ferroelastic and paraelastic phases. Besides, H-1 NMR spin-spin relaxation measurements revealed a change due to the irradiation in the proton dynamics at the ferroelastic phase transition, apparently accounting for the much-reduced electrical conductivity in the paraelastic phase of the irradiated system.
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