A nuclear magnetic resonance study of tetramethylammonium tribromocadmate

Venugopal, KR and Sastry, VSS and Ramakrishna, J (1987) A nuclear magnetic resonance study of tetramethylammonium tribromocadmate. In: Journal of Physics C: Solid State Physics, 20 (10). pp. 1519-1525.

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Abstract

Proton spin lattice relaxation (T1) in (CH3)4NCdBr3 at different Larmor frequencies (10, 20 and 30 MHz) has been studied in the temperature range 77 to 400 K. The variations in T1 at high temperature are independent of frequency and show a maximum due to spin rotation- interaction. The other features are interpreted as being due to isotropic tumbling of the tetramethylammonium ion and random reorientation of the CH3 group. The CW spectrum remained narrow up to 77 K and develops a wing structure at low temperatures. This observation is attributed to a possible tunnelling motion of the CH3 group, which has rather low activation energy as demonstrated by the study of T1.

Item Type:	Journal Article
Publication:	Journal of Physics C: Solid State Physics
Publisher:	Institute of Physics
Additional Information:	Copy right of this article belongs to Institute of Physics.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	15 Jan 2010 06:55
Last Modified:	19 Sep 2010 05:37
URI:	http://eprints.iisc.ac.in/id/eprint/21421

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