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Superfluid He-3 A-B surface tension

Research output: Contribution to journalJournal article


Journal publication date05/2003
JournalPhysica B: Condensed Matter
Journal number1
Number of pages4
Original languageEnglish


Conference23rd International Conference on Low Temperature Physics (LT23)


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.