Superfluid He-3 A-B surface tension

Bartkowiak, M. and Haley, Richard P. and Fisher, Shaun N. and Guénault, A.M. and Pickett, George R. and Skyba, P. (2003) Superfluid He-3 A-B surface tension. Physica B: Condensed Matter, 329-33 (1). pp. 122-125. ISSN 0921-4526

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We have made two different measurements of interfacial energies below 300 muK, at zero pressure and in magnetic fields up to 400 mT. A variable magnetic field profile allows us to stabilize and precisely manipulate the position of the A-B interface. First, we can derive the difference in wall wetting energies from the behaviour of the phase boundary as it enters and exits a stack of glass capillary tubes. Secondly, we can measure the surface tension from the level of over-or under-magnetization needed to force the interface through an aperture. These are the first surface energy measurements in high magnetic fields in the zero-temperature limit. Our results are in surprising agreement with earlier measurements at high pressure close to T-c.

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Journal Article
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Physica B: Condensed Matter
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26 Jan 2009 10:24
Last Modified:
21 Nov 2022 19:11