NMR study of proton dynamics in ferroelectric KIO₃*2HIO₃ crystal
The temperature dependence of the proton spin-lattice relaxation time T₁ has been studied in ferroelectric KIO₃*2HIO₃ crystal. It is shown that the proton jumping along 0—H....0 contact has been shown to be the main relaxation mechanism. At temperatures exceeding the phase transition one, e>Tc, t...
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| Опубліковано в: : | Functional Materials |
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| Дата: | 2008 |
| Автори: | , , , |
| Формат: | Стаття |
| Мова: | English |
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НТК «Інститут монокристалів» НАН України
2008
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| Онлайн доступ: | https://nasplib.isofts.kiev.ua/handle/123456789/137248 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | NMR study of proton dynamics in ferroelectric KIO₃*2HIO₃ crystal / D.F. Baisa, E.D. Chesnokov, A.I. Ovcharenko, I.G. Vertegel // Functional Materials. — 2008. — Т. 15, № 1. — С. 19-22. — Бібліогр.: 8 назв. — англ. |
Репозитарії
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nasplib_isofts_kiev_ua-123456789-137248 |
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Baisa, D.F. Chesnokov, E.D. Ovcharenko, A.I. Vertegel, I.G. 2018-06-17T09:20:29Z 2018-06-17T09:20:29Z 2008 NMR study of proton dynamics in ferroelectric KIO₃*2HIO₃ crystal / D.F. Baisa, E.D. Chesnokov, A.I. Ovcharenko, I.G. Vertegel // Functional Materials. — 2008. — Т. 15, № 1. — С. 19-22. — Бібліогр.: 8 назв. — англ. 1027-5495 https://nasplib.isofts.kiev.ua/handle/123456789/137248 The temperature dependence of the proton spin-lattice relaxation time T₁ has been studied in ferroelectric KIO₃*2HIO₃ crystal. It is shown that the proton jumping along 0—H....0 contact has been shown to be the main relaxation mechanism. At temperatures exceeding the phase transition one, e>Tc, the proton relaxation is caused by the motion thereof in symmetric two-well potential of the hydrogen bond with activation energy Ec = 3.4 kcal/mol. At T<Tc, the proton ordering in asymmetric two-well potential occurs with activation energies Ea1 = 4.1 kcal/mol and Ea2 = 2.5 kcal/mol. Evaluation of equilibrium constant value a = p₁/p₁, where p₁ and p₁ are the probabilities of proton being in position "1" or "2" of double-well potential near Tc, gives the value a≈40, but yet at Tc,—T ≈ 50 K, a≈450, thus evidencing a high proton ordering degree on H-bond below the phase transition. en НТК «Інститут монокристалів» НАН України Functional Materials Characterization and properties NMR study of proton dynamics in ferroelectric KIO₃*2HIO₃ crystal ЯМР дослідження динаміки протонів у сегнетоелектричному кристалі KIO₃*2HIO₃ Article published earlier |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| title |
NMR study of proton dynamics in ferroelectric KIO₃*2HIO₃ crystal |
| spellingShingle |
NMR study of proton dynamics in ferroelectric KIO₃*2HIO₃ crystal Baisa, D.F. Chesnokov, E.D. Ovcharenko, A.I. Vertegel, I.G. Characterization and properties |
| title_short |
NMR study of proton dynamics in ferroelectric KIO₃*2HIO₃ crystal |
| title_full |
NMR study of proton dynamics in ferroelectric KIO₃*2HIO₃ crystal |
| title_fullStr |
NMR study of proton dynamics in ferroelectric KIO₃*2HIO₃ crystal |
| title_full_unstemmed |
NMR study of proton dynamics in ferroelectric KIO₃*2HIO₃ crystal |
| title_sort |
nmr study of proton dynamics in ferroelectric kio₃*2hio₃ crystal |
| author |
Baisa, D.F. Chesnokov, E.D. Ovcharenko, A.I. Vertegel, I.G. |
| author_facet |
Baisa, D.F. Chesnokov, E.D. Ovcharenko, A.I. Vertegel, I.G. |
| topic |
Characterization and properties |
| topic_facet |
Characterization and properties |
| publishDate |
2008 |
| language |
English |
| container_title |
Functional Materials |
| publisher |
НТК «Інститут монокристалів» НАН України |
| format |
Article |
| title_alt |
ЯМР дослідження динаміки протонів у сегнетоелектричному кристалі KIO₃*2HIO₃ |
| description |
The temperature dependence of the proton spin-lattice relaxation time T₁ has been studied in ferroelectric KIO₃*2HIO₃ crystal. It is shown that the proton jumping along 0—H....0 contact has been shown to be the main relaxation mechanism. At temperatures exceeding the phase transition one, e>Tc, the proton relaxation is caused by the motion thereof in symmetric two-well potential of the hydrogen bond with activation energy Ec = 3.4 kcal/mol. At T<Tc, the proton ordering in asymmetric two-well potential occurs with activation energies Ea1 = 4.1 kcal/mol and Ea2 = 2.5 kcal/mol. Evaluation of equilibrium constant value a = p₁/p₁, where p₁ and p₁ are the probabilities of proton being in position "1" or "2" of double-well potential near Tc, gives the value a≈40, but yet at Tc,—T ≈ 50 K, a≈450, thus evidencing a high proton ordering degree on H-bond below the phase transition.
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| issn |
1027-5495 |
| url |
https://nasplib.isofts.kiev.ua/handle/123456789/137248 |
| citation_txt |
NMR study of proton dynamics in ferroelectric KIO₃*2HIO₃ crystal / D.F. Baisa, E.D. Chesnokov, A.I. Ovcharenko, I.G. Vertegel // Functional Materials. — 2008. — Т. 15, № 1. — С. 19-22. — Бібліогр.: 8 назв. — англ. |
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2025-12-01T13:57:34Z |
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