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The thermodynamics of the A-B transition in superfluid He-3 as a probe of the A-phase gap node geometry.

Bartkowiak, M. and Fisher, Shaun N. and Guénault, A.M. and Haley, Richard P. and Plenderleith, G. N. and Pickett, George R. and Skyba, P. (2000) The thermodynamics of the A-B transition in superfluid He-3 as a probe of the A-phase gap node geometry. Physica B: Condensed Matter, 280 (1-4). pp. 108-111. ISSN 0921-4526

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Abstract

We have used a magnetic field gradient to stabilise the phase boundary between the A- and B-phases of superfluid He-3 inside a quasiparticle black body radiator down to 146 mu K; The radiator technique enables us to measure very accurately the density of quasiparticle excitations and therefore the temperature of the B-phase inside the radiator. As we ramp the held through the transition we can observe the cooling (warming) effect when the volume of A-phase is increased (decreased). From these measurements we deduce the temperature dependence of the latent heat, which provides the lowest temperature verification yet of the existence of nodes in the A-phase order parameter.

Item Type: Article
Journal or Publication Title: Physica B: Condensed Matter
Uncontrolled Keywords: A-B transition ; He-3 superfluid ; latent heat ; phase transition ; ultralow temperatures
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 23501
Deposited By: Dr Richard P. Haley
Deposited On: 28 Jan 2009 16:52
Refereed?: Yes
Published?: Published
Last Modified: 17 Jul 2013 10:23
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/23501

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