Abstract
The temperature dependences of NQR line frequencies and widths of 121Sb (for the ±1/2→±3/2 transition) and of 123Sb (for the ±1/2→±3/2 and ±3/2→±5/2 transitions), as well as of the principal components and the asymmetry parameter of the electric-field-gradient tensor at the 123Sb nucleus have been studied in a SbSI crystal in the 115–325 K range. The dynamic and static factors governing the character of these relations are discussed. The ±1/2→±3/2 line in the 121Sb NQR spectrum splits into a doublet within a narrow (0.5 K) temperature interval near the ferroelectric phase transition (T c=293 K), which is associated with the formation of a macroscopic heterophase structure in the crystal.
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Fiz. Tverd. Tela (St. Petersburg) 41, 1286–1292 (July 1999)
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Popov, S.N. 121Sb and 123Sb NQR and the heterophase structure in the SbSI ferroelectric. Phys. Solid State 41, 1175–1181 (1999). https://doi.org/10.1134/1.1130961
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DOI: https://doi.org/10.1134/1.1130961