On the Magnetic-Field Dependence of the Longitudinal Ultrasonic Attenuation in a Type-II Superconductor

TL;DR

This paper introduces a simple theoretical method to explain how longitudinal ultrasonic attenuation in a type-II superconductor varies with magnetic field, aligning well with experimental data especially near the lower critical field H_c1.

Contribution

The paper presents a novel, straightforward approach to model magnetic-field dependence of ultrasonic attenuation in type-II superconductors, improving agreement with experimental results near H_c1.

Findings

The proposed model matches experimental data near H_c1.

Conventional methods fail to accurately predict attenuation near H_c1.

The new method provides better understanding of ultrasonic behavior in superconductors.

Abstract

We propose a simple method by which we can explain the magnetic-field dependence of the longitudinal ultrasonic attenuation in a type-II superconductor. It gives a curve which is in good agreement with experimental data, in paticular, near the lower critical field H_c1. We compare it with conventional methods, which is not in good agreement with the experimental data near H_c1 but near the upper critical field H_c2.