Analysis of Experimental Conditions for Simultaneous Measurements of Transport and Magnetotransport Coefficients of High Temperature Superconductors

TL;DR

This paper analyzes the experimental conditions necessary for simultaneous transport and magnetotransport measurements in high temperature superconductors, reports test measurements on Bi2212, and discusses error sources and optimization strategies.

Contribution

It introduces a new experimental setup for measuring transport coefficients in high temperature superconductors under magnetic fields and analyzes potential error sources and optimization methods.

Findings

Test measurements of thermal conductivity, thermoelectric power, and Nernst-Ettingshausen effect on Bi2212 in 2T field.

Discussion of errors related to thermocouple parameters and heat flows.

Suggestions for optimizing experimental conditions.

Abstract

Experimental conditions for simultaneous measurements of transport coefficients of high temperature superconductors in zero and non-zero magnetic fields are analysed. Test measurements of the thermal conductivity, the thermoelectric power and the Nernst - Ettingshausen effect of a textured Bi2212 sample are reported in an external magnetic field of 2T. Errors related to parameters of the thermocouple used and to the spurious heat flows are discussed for a new experimental set-up built based on a closed cycle helium refrigerator. Possible optimising of experimental conditions is suggested.