Evaluation of a long-time temperature drift in a commercial Quantum Design MPMS SQUID magnetometer using Gd$_2$O$_3$ as a standard

TL;DR

This study assesses the long-term temperature stability of a Quantum Design MPMS SQUID magnetometer using Gd$_2$O$_3$, finding minimal drift and rapid stabilization, which challenges previous claims of larger temperature variations.

Contribution

The paper provides a detailed evaluation of the temperature drift in a commercial SQUID magnetometer, demonstrating improved stability and faster stabilization times than previously reported.

Findings

Temperature drift did not exceed 1-1.5 K.

System stabilized within 3 hours.

Temperature deviation was less than 0.2 K after 30 minutes.

Abstract

The long-time temperature drift in a commercial Quantum Design MPMS SQUID magnetometer was evaluated using time-dependent magnetization measurements of Gd$_2$O$_3$. In contrast to earlier claims, the amplitude of the drift was found not to exceed 1-1.5 K. 30 minutes after system stabilization the temperature deviation did not exceed 0.2 K and the temperature was fully stabilized in less than 3 hours.