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Vortex Core Size in $^3$He-$^4$He films with Monolayer Superfluid $^4$He

Han-Ching Chu·Gary A. Williams
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Abstract

The superfluid transition of $^3$He-$^4$He mixture films adsorbed on alumina powder is studied, with a $^4$He superfluid coverage near one layer. With up to 1.3 layers of $^3$He added, the transition becomes strongly broadened, indicating a linear increase in the vortex core size for $^3$He coverages below one layer. Annealing of the sample mixture at 4.2 K is found to be critically important in ensuring a homogeneous film across the porous substrate.

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Han-Ching Chu, Gary A. Williams. 1999-10-05. Vortex Core Size in $^3$He-$^4$He films with Monolayer Superfluid $^4$He. https://doi.org/10.1016/s0921-4526(99)02688-5

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