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Home > Research > Publications & Outputs > Superfluid He-3 A-B surface tension
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Superfluid He-3 A-B surface tension

Research output: Contribution to journalJournal article

Published

Journal publication date05/2003
JournalPhysica B: Condensed Matter
Journal number1
Volume329-333
Number of pages4
Pages122-125
Original languageEnglish

Conference

Conference23rd International Conference on Low Temperature Physics (LT23)
CountryJapan
CityHIROSHIMA
Period20/08/0227/08/02

Abstract

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.