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Spatial manipulation of the persistent precessing spin domain in superfluid He-3-B.

Bradley, D. Ian and Clubb, D. O. and Fisher, Shaun N. and Guénault, A.M. and Matthews, C. J. and Pickett, George R. and Skyba, P. (2004) Spatial manipulation of the persistent precessing spin domain in superfluid He-3-B. Journal of Low Temperature Physics, 134 (1-2). pp. 351-356. ISSN 0022-2291

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Abstract

Using pulsed NMR we have been studying the properties of the persistent precessing domain (PPD) in superfluid He-3-B at ultralow temperatures. These precessing spin domains are very long-lived, persisting for periods of over half an hour under favourable conditions. In the current experiment, by using two NMR coils, we are able to monitor the spatial location of the domain. The PPD is trapped in a field minimum along the axis of the cell, the position of which we can manipulate by variation of the field gradient. We find that the signal lifetime becomes much shorter and independent of temperature when the region of precession is brought into close proximity to the closed end of the experimental cell, suggesting that an extra temperature-independent dissipation mechanism comes into play in the vicinity of the cell walls.

Item Type: Article
Journal or Publication Title: Journal of Low Temperature Physics
Uncontrolled Keywords: superfluid ; helium-3 ; SPIN PRECESSION
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 23561
Deposited By: Dr Richard P. Haley
Deposited On: 03 Feb 2009 15:13
Refereed?: Yes
Published?: Published
Last Modified: 17 Jul 2013 10:23
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/23561

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