Temperature dependences of the upper critical field and the Ginzburg-Landau parameter of Li2Pd3B from magnetization measurements

TL;DR

This study investigates the temperature dependence of the upper critical field and Ginzburg-Landau parameter in Li2Pd3B superconductor using magnetization measurements and a novel scaling method, confirming BCS theory predictions.

Contribution

Introduces a specialized scaling approach to analyze magnetization data, revealing critical field behavior consistent with BCS theory in Li2Pd3B.

Findings

H_c2(T) closely matches BCS theory predictions

Magnetic penetration depth agrees with muon-spin-rotation data

Validates the scaling approach for superconductor analysis

Abstract

We present temperature dependences of the upper critical magnetic field and the Ginzburg-Landau parameter for a ternary boride superconductor Li_2Pd_3B obtained from magnetization measurements. A specially developed scaling approach was used for the data analysis. The resulting H_c2(T) curve turns out to be surprisingly close to predictions of the BCS theory. The magnetic field penetration depth, evaluated in this work, is in excellent agreement with recent muon-spin-rotation experiments. We consider this agreement as an important proof of the validity of our approach.