Pauli paramagnetic effects on vortices in superconducting TmNi2B2C

L. DeBeer-Schmitt; Morten Ring Eskildsen; M. Ichioka; K. Machida; N. Jenkins; C.D. Dewhurst; Asger Bech Abrahamsen; S.L. Bud'ko; P.C. Canfield

doi:10.1103/PhysRevLett.99.167001

Pauli paramagnetic effects on vortices in superconducting TmNi2B2C

L. DeBeer-Schmitt, Morten Ring Eskildsen, M. Ichioka, K. Machida, N. Jenkins, C.D. Dewhurst, Asger Bech 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 0.6H(c2) 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 language	English
Article number	167001
Journal	Physical Review Letters
Volume	99
Issue number	16
Number of pages	4
ISSN	0031-9007
DOIs	https://doi.org/10.1103/PhysRevLett.99.167001
Publication status	Published - 2007

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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 0.6H(c2) 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.",

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AU - DeBeer-Schmitt, L.

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AU - Ichioka, M.

AU - Machida, K.

AU - Jenkins, N.

AU - Dewhurst, C.D.

AU - Abrahamsen, Asger Bech

AU - Bud'ko, S.L.

AU - Canfield, P.C.

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AB - 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 0.6H(c2) 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.

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Pauli paramagnetic effects on vortices in superconducting TmNi2B2C

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