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$^{35}Cl NQR$ studies of bismuth trichloride

Babu, PK and Ramakrishna, J (1997) $^{35}Cl NQR$ studies of bismuth trichloride. In: Zeitschrift fur Naturforschung, Teil A, 52A (8-9). pp. 614-620.

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The temperature dependence of the $^{35}Cl$ nuclear quadrupole resonance (NQR) frequency and spin lattice relaxation time $(T_1)$ are studied in crystalline $BiCl_3$, in the range 40-300 K. The positive temperature coefficient observed for one of the 35Cl resonances is explained in terms of the strong intermolecular interactions that exist in this compound. Variation of $T_1$ with temperature is found to be similar at the chemically inequivalent halogen sites. Semiclassical descriptions based on torsional oscillator dynamics are found to be inadequate for explaining the spin lattice relaxation. $T_1(T)$ data follow an $AT^2+BT^3$ type behaviour, indicating that the anharmonic nature of the lattice vibrations plays a significant role in determining the temperature dependence of $T_1$ at high temperatures.

Item Type: Journal Article
Publication: Zeitschrift fur Naturforschung, Teil A
Publisher: Verlag der Zeitschrift fur Naturforschung, Germany
Additional Information: Copyright of this article belongs to Verlag der Zeitschrift fur Naturforschung.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 17 Jul 2007
Last Modified: 27 Aug 2008 12:43
URI: http://eprints.iisc.ac.in/id/eprint/10344

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