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Interfacial energy of the superfluid He-3 A-B phase interface in the zero-temperature limit.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

<mark>Journal publication date</mark>23/07/2004
<mark>Journal</mark>Physical review letters
Issue number4
Number of pages0
Pages (from-to)046301
Publication StatusPublished
<mark>Original language</mark>English


We have measured the surface energy of the interface between the A and B phases of superfluid He-3 in the low temperature limit at zero pressure. Using a shaped magnetic field, we control the passage of the phase boundary through a small aperture. We obtain the interphase surface energy from the over- or undermagnetization required to force the interface through the aperture in both directions, yielding values of the surface tension and the interfacial contact angle. This is the first measurement of the interfacial energy in high magnetic fields and in the zero-temperature limit.