Determination of an onset of superconducting diamagnetism by scaling of the normal-state magnetization

TL;DR

The paper introduces a scaling method for normal-state magnetization data that enables precise identification of the temperature at which superconducting diamagnetism begins to appear.

Contribution

A simple scaling procedure is proposed to unify magnetization data across different fields, allowing accurate determination of the onset temperature of superconducting diamagnetism.

Findings

Magnetization curves collapse onto a single line after scaling.

Onset of diamagnetism identified by divergence of scaled curves.

Method provides reliable onset temperature measurement.

Abstract

We propose a simple scaling procedure for the normal-state magnetization Mn data collected as functions of temperature T in different magnetic fields H. As a result, the Mn(T) curves collected in different fields collapse on to a single Msc(T) line. In this representation, the onset of superconducting diamagnetism manifests itself by a sharp divergence of the Msc(T) curves for different H values. As will be demonstrated, this allows for a reliable determination of temperature Tonset, at which superconducting diamagnetism become observable.