Relaxation properties of defect complexes in SrCI₂-TI+ crystals
Two maxima are observed in the thermograms of of the thermostimulated depolarization currents of SrCI₂-TI+ crystals have been observed: a low-temperature one (Tm = 107 K, £m = 0.24 eV), caused by the reorientation of Tl+Va+ dipoles, and high-temperature one (Tm = 215 K, £m = 0.46 eV) related to ther...
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| Datum: | 2004 |
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| Hauptverfasser: | , , , , |
| Format: | Artikel |
| Sprache: | English |
| Veröffentlicht: |
НТК «Інститут монокристалів» НАН України
2004
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| Schriftenreihe: | Functional Materials |
| Online Zugang: | http://dspace.nbuv.gov.ua/handle/123456789/139539 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Zitieren: | Relaxation properties of defect complexes in SrCI₂-TI+ crystals / S.I. Kachan, V.M. Salapak , Z.P. Chornyi, I.B. Pirko, T.M. Kushnir // Functional Materials. — 2004. — Т. 11, № 4. — С. 684-688. — Бібліогр.: 9 назв. — англ. |
Institution
Digital Library of Periodicals of National Academy of Sciences of Ukraine| Zusammenfassung: | Two maxima are observed in the thermograms of of the thermostimulated depolarization currents of SrCI₂-TI+ crystals have been observed: a low-temperature one (Tm = 107 K, £m = 0.24 eV), caused by the reorientation of Tl+Va+ dipoles, and high-temperature one (Tm = 215 K, £m = 0.46 eV) related to thermal dissociation thereof. TI+Va+-dipoles possess C3V symmetry, that results in splitting of the absorption А-band (1S033 transition) into two components with maxima at 234 and 247 nm. At low-temperature irradiation (T < 140 K), TI+VD+-dipole concentration (at the stage of a crystal coloring saturation) is decreased by 15-20 % as a consequence of charge carrier capture by
TI+-ions. |
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