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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НТК «Інститут монокристалів» НАН України
2008
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Online Zugang: | http://dspace.nbuv.gov.ua/handle/123456789/137248 |
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Zitieren: | 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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irk-123456789-1372482018-06-18T03:04:49Z 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 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. 2008 Article 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 http://dspace.nbuv.gov.ua/handle/123456789/137248 en Functional Materials НТК «Інститут монокристалів» НАН України |
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Characterization and properties Characterization and properties |
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Characterization and properties Characterization and properties Baisa, D.F. Chesnokov, E.D. Ovcharenko, A.I. Vertegel, I.G. NMR study of proton dynamics in ferroelectric KIO₃*2HIO₃ crystal Functional Materials |
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. |
format |
Article |
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. |
author_sort |
Baisa, D.F. |
title |
NMR study of proton dynamics in ferroelectric KIO₃*2HIO₃ crystal |
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 |
publisher |
НТК «Інститут монокристалів» НАН України |
publishDate |
2008 |
topic_facet |
Characterization and properties |
url |
http://dspace.nbuv.gov.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. |
series |
Functional Materials |
work_keys_str_mv |
AT baisadf nmrstudyofprotondynamicsinferroelectrickio32hio3crystal AT chesnokoved nmrstudyofprotondynamicsinferroelectrickio32hio3crystal AT ovcharenkoai nmrstudyofprotondynamicsinferroelectrickio32hio3crystal AT vertegelig nmrstudyofprotondynamicsinferroelectrickio32hio3crystal |
first_indexed |
2025-07-10T03:31:45Z |
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fulltext |
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