Linear magnetic susceptibility of anisotropic superconductors of cuboidal shape

TL;DR

This paper presents a simplified model for anisotropic magnetic susceptibility in cuboidal superconductors, enabling precise measurement of the London penetration depth components and analysis of the superfluid density tensor.

Contribution

The paper introduces a simplified model for anisotropic magnetic susceptibility in cuboidal superconductors, facilitating the extraction of superfluid density tensor components from magnetic response measurements.

Findings

Model accurately describes susceptibility in the Meissner state

Allows determination of London penetration depth components

Enables analysis of superconducting gap structure

Abstract

A simplified model of anisotropic magnetic susceptibility in the Meissner-London vortex-free state of cuboidal superconducting samples is presented. Using this model, precision measurements of the magnetic response in three perpendicular directions of a magnetic field with respect to primary crystal axes, can be used to extract the components of the London penetration depth, thus enabling the evaluation of the general superfluid density tensor, which is needed in the analysis of the superconducting gap structure.