Pulsed DSC Observation of the Static Spin Correlations

TL;DR

This paper reports high-precision pulsed DSC measurements revealing a broad low-temperature heat capacity anomaly linked to impurity-induced static spin correlations in high-temperature superconductors.

Contribution

It introduces a novel pulsed DSC method for equilibrium heat capacity measurements and identifies a broad anomaly associated with static spin correlations.

Findings

Observed a broad peak in low-temperature heat capacity.

Linked the anomaly to impurity-induced static spin correlations.

Demonstrated the effectiveness of pulsed DSC in superconductor studies.

Abstract

The investigations of low-temperature heat capacity in pure and impurity doped high temperature superconductors have been performed by high-precision pulsed differential scanning calorimeter, providing the measurements of heat capacities under the thermodynamically equilibrium conditions in contrast to commonly used differential scanning calorimeters. The anomaly of low-temperature heat capacity of a wide peak form related with impurity induced static spin correlations was observed.