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Coherent spin precession in superfluid He-3-B excited in a field minimum at low temperatures.

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<mark>Journal publication date</mark>02/2005
<mark>Journal</mark>Journal of Low Temperature Physics
Issue number3-4
Volume138
Number of pages6
Pages (from-to)777-782
Publication StatusPublished
<mark>Original language</mark>English

Abstract

The persistent precessing domain (PPD) is an isolated region of coherent spin precession which is observed in the B phase of superfluid He-3 at the lowest achievable temperatures. It has many unusual properties and its free decay can exceed 1000 s at the lowest temperatures. Previous observations of the PPD were highly irreproducible but we now find the PPD to be very reproducible when there is a field minimum along the cell axis. Here we discuss measurements of the PPD as we control the magnetic field profile, allowing the depth of the minimum to be adjusted.