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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Datum:2008
Hauptverfasser: Baisa, D.F., Chesnokov, E.D., Ovcharenko, A.I., Vertegel, I.G.
Format: Artikel
Sprache:English
Veröffentlicht: НТК «Інститут монокристалів» НАН України 2008
Schriftenreihe:Functional Materials
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Online Zugang:http://dspace.nbuv.gov.ua/handle/123456789/137248
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Назва журналу:Digital Library of Periodicals of National Academy of Sciences of Ukraine
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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spelling 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
institution Digital Library of Periodicals of National Academy of Sciences of Ukraine
collection DSpace DC
language English
topic Characterization and properties
Characterization and properties
spellingShingle 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
last_indexed 2025-07-10T03:31:45Z
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