Growth and angular dependent resistivity of Nb2Pd0.73S5.7 superconducting single crystals fiber

TL;DR

This study reports the growth of Nb2Pd0.73S5.7 superconducting fibers and investigates their anisotropic resistivity, revealing a temperature-dependent anisotropy indicative of multi-band superconductivity.

Contribution

It introduces a method for growing superconducting fibers and compares anisotropy measurement techniques, highlighting the multi-band nature of the superconductor.

Findings

Superconducting transition temperature ~6.5K confirmed.

Anisotropy near Tc is approximately 2.5 from scaling approach.

Anisotropy varies with temperature, indicating multi-band superconductivity.

Abstract

We report the growth of Nb2Pd0.73S5.7 superconducting single crystal fibers via slow cooling solid state reaction method. Superconducting transition temperature (Tc ~ 6.5K) is confirmed from magnetization and transport measurements. A comparative study is performed for determination of superconducting anisotropy, {\Gamma}, via conventional method (by taking ration of two superconducting parameters) and scaling approach method. Scaling approach, defined within the framework of the Ginzburg-Landau theory is applied to the angular dependent resistivity measurements to estimate the anisotropy. The value of {\Gamma} close to Tc from scaling approach is found to be ~ 2.5 that is slight higher compare to conventional approach (~2.2). Further, variation of anisotropy with temperature suggests that it is a type of multi-band superconductor.