Pauli paramagnetic effects on vortices in superconducting TmNi2B2C

L. Debeer-Schmitt, M. R. Eskildsen, M. Ichioka, K. Machida, N. Jenkins, C. D. Dewhurst, A. B. Abrahamsen, S. L. Bud'Ko, P. C. Canfield

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Abstract

The magnetic field distribution around the vortices in TmNi2B2C in the paramagnetic phase was studied experimentally as well as theoretically. The vortex form factor, measured by small-angle neutron scattering, is found to be field independent up to 0.6Hc2 followed by a sharp decrease at higher fields. The data are fitted well by solutions to the Eilenberger equations when paramagnetic effects due to the exchange interaction with the localized 4f Tm moments are included. The induced paramagnetic moments around the vortex cores act to maintain the field contrast probed by the form factor.

Original languageEnglish
Article number167001
JournalPhysical Review Letters
Volume99
Issue number16
DOIs
Publication statusPublished - Oct 16 2007

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Debeer-Schmitt, L., Eskildsen, M. R., Ichioka, M., Machida, K., Jenkins, N., Dewhurst, C. D., Abrahamsen, A. B., Bud'Ko, S. L., & Canfield, P. C. (2007). Pauli paramagnetic effects on vortices in superconducting TmNi2B2C. Physical Review Letters, 99(16), [167001]. https://doi.org/10.1103/PhysRevLett.99.167001