Magneto - transport characterization of Dy123 monodomain superconductors

TL;DR

This study characterizes Dy123 monodomain superconductors, analyzing their thermal and electrical transport properties under magnetic fields, revealing unique vortex behaviors and microstructure effects distinct from other forms.

Contribution

It provides detailed magneto-thermal transport data and identifies two vortex regimes related to the microstructure in Dy123 superconductors.

Findings

Distinct magneto-thermal features compared to single crystals and polycrystals

Identification of two vortex regimes in the mixed phase

Calculated vortex viscosity, entropy, and figure of merit

Abstract

The following report considers textured materials of the DyBa2Cu3O7 type seeded with a Nd123 seed as initiator. They are grown with an excess 20% Dy211 phase on a Dy2O3 substrate. We report chemical characterizations, electrical resistivity, thermoelectric power and thermal conductivity over a broad temperature range as a function of an applied magnetic field up to 6 T. We show that specific features appear on the magneto thermal transport properties different in these materials from those found in single crystals and polycrystalline samples. We propose that two vortex regimes can be distinguished in the mixed phase, - due to the intrinsic microstructure. We calculate the viscosity, entropy and figure of merit of the samples.