Pauli Paramagnetic Effects on Vortices in Superconducting TmNi2B2C

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 0.6 Hc2 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.

4 pages, 4 figures

References in corpus (7)

• Fulde-Ferrell-Larkin-Ovchinnikov State in Heavy Fermion Superconductors
• Reentrant vortex lattice transformation in four-fold symmetric superconductors
• Electronic state around vortex in a two-band superconductor
• Vortex state in a Fulde-Ferrell-Larkin-Ovchinnikov superconductor based on the quasiclassical theory
• Tunneling spectroscopy in the magnetic superconductor TmNi2B2C
• Thermodynamics and magnetic field profiles in low-kappa type-II superconductors
• Magnetic-Field Dependences of Thermodynamic Quantities in the Vortex State of Type-II Superconductors

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• Simultaneous Evidence for Pauli Paramagnetic Effects and Multiband Superconductivity in KFe${}_2$As${}_2$ by Small-Angle Neutron Scattering Studies of the Vortex Lattice
• Field Evolution of the Fulde-Ferrell-Larkin-Ovchinnikov State in a Superconductor with Strong Pauli Effects
• Vortex lattice studies in CeCoIn5 with H perpendicular to c
• Anisotropy and multiband superconductivity in Sr2RuO4
• Paramagnetic Effects in the Vortex Lattice Field Distribution of Strongly Type-II Superconductors
• Eilenberger theory and London theory for transverse components of flux line lattice form factors in uniaxial superconductors
• Peculiarities of the superconducting gaps and the electron-boson interaction in TmNi2B2C as seen by point-contact spectroscopy
• Conventional Superconductivity in the Doped Kagome Superconductor Cs(V0.86Ta0.14)3Sb5 from Vortex Lattice Studies
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• Deviations from the extended London model at high magnetic fields in YBa${}_2$Cu${}_3$O${}_7$
• Origin of spontaneous broken mirror symmetry of vortex lattices in Nb
• Field Dependence of the Superconducting Basal Plane Anisotropy of TmNi2B2C