Effect of field dependent core size on reversible magnetization of high-$\kappa$ superconductors

Abstract

The field dependence of the vortex core size $\xi (B)$ is incorporated in the London model, in order to describe reversible magnetization $M(B,T)$ for a number of materials with large Ginzburg-Landau parameter $\kappa$. The dependence $\xi (B)$ is directly related to deviations in $M(\ln B)$ from linear behavior prescribed by the standard London model. A simple method to extract $\xi (B)$ from the magnetization data is proposed. For most materials examined, $\xi (B)$ so obtained decreases with increasing field and is in qualitative agreement both with behavior extracted from $\mu$SR and small angle neutron scattering data and with that predicted theoretically.

References in corpus (9)

• MgB2 single crystals: high pressure growth and anisotropic properties
• Investigations of the Core Structure of Magnetic Vortices in Type-II Superconductors by muSR
• The effect of nonmagnetic impurities on the local density of states in s-wave superconductors
• Anomalous Flux Flow Resistivity in Two Gap Superconductor MgB_2
• On the field dependence of the vortex core size
• Shrinking Magnetic Vortices in V3Si Due to Delocalized Quasiparticle Core States: Confirmation of the Microscopic Theory for Interacting Vortices
• Field Dependent Coherence Length in the Superclean, High-Kappa Superconductor CeCoIn5
• Anisotropy and internal field distribution of MgB2 in the mixed state at low temperatures
• Effects of superconducting gap anisotropy on the flux flow resistivity in Y(Ni_{1-x}Pt_x)_2B_2C

Cited by in corpus (8)

• Field dependence of the vortex core size probed by STM
• In-plane magnetic penetration depth of superconducting CaKFe${}_4$As${}_4$
• Anomalous Meissner effect in pnictide superconductors
• Magnetic penetration depth in single crystals of SrPd${}_2$Ge${}_2$ superconductor
• Structural and Superconducting Properties of RbOs2O6 Single Crystals
• Flux quanta driven by high-density currents in low-impurity V3Si and LuNi2B2C: free flux flow and flux-core size effect
• Effects of scattering on the field-induced Tc enhancement in thin superconducting films in a parallel magnetic field
• Quasiclassical theory of vortex states in locally non-centrosymmetric superconductors: application to CeRh${}_2$As${}_2$