Mallikarjunaiah, KJ and Paramita, KC and Ramesh, KP and Damle, R (2007) Study of molecular reorientation and quantum rotational tunneling in tetramethylammonium selenate by H-1 NMR. In: Solid State Nuclear Magnetic Resonance, 32 (1). pp. 11-15.
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H-1 NMR spin-lattice relaxation time measurements have been carried out in [(CH3)(4)N](2)SeO4 in the temperature range 389-6.6K to understand the possible phase transitions, internal motions and quantum rotational tunneling. A broad T, minimum observed around 280K is attributed to the simultaneous motions of CH3 and (CH3)(4)N groups. Magnetization recovery is found to be stretched exponential below 72 K with varying stretched exponent. Low-temperature T-1 behavior is interpreted in terms of methyl groups undergoing quantum rotational tunneling. (c) 2007 Elsevier Inc. All rights reserved.
|Item Type:||Journal Article|
|Additional Information:||Copyright of this article belongs to Elsevier Science.|
|Keywords:||H NMR;Internal motions;Magnetization recovery;Spin–lattice relaxation time;Quantum rotational tunneling.|
|Department/Centre:||Division of Physical & Mathematical Sciences > Physics|
|Date Deposited:||11 Jun 2010 09:17|
|Last Modified:||19 Sep 2010 06:01|
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