Vortex Core Contribution to Textural Energy in 3He–B Below 0.4Tc

Vortex lines affect the spatial order-parameter distribution in superfluid 3 He–B owing to superflow circulating around vortex cores and due to the interaction of the order parameter in the core and in the bulk as a result of superfluid coherence over the whole volume. The step-like change of the la...

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Bibliographic Details
Published in:Journal of low temperature physics 2011-02, Vol.162 (3-4), p.212-225
Main Authors: Eltsov, V. B., de Graaf, R., Krusius, M., Zmeev, D. E.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Condensed Matter Physics
Fluid flow
Fluids
Low temperature physics
Magnetic Materials
Magnetism
Physics
Physics and Astronomy
Searching
Superfluidity
Surface layer
Texture
Vortices
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Summary:Vortex lines affect the spatial order-parameter distribution in superfluid 3 He–B owing to superflow circulating around vortex cores and due to the interaction of the order parameter in the core and in the bulk as a result of superfluid coherence over the whole volume. The step-like change of the latter contribution at 0.6 T c (at a pressure of 29 bar) signifies the transition from axisymmetric cores at higher temperatures to broken-symmetry cores at lower temperatures. We extended earlier measurements of the core contribution to temperatures below 0.2 T c , in particular searching for a possible new core transition to lower symmetries. As a measuring tool we track the energy levels of magnon condensate states in a trap formed by the order-parameter texture.
ISSN:0022-2291
1573-7357
DOI:10.1007/s10909-010-0285-1