Thermo-magnetic hysteretic properties resembling superconductivity in the normal state of La1.85Sr0.15CuO4

TL;DR

This study reveals magnetic hysteresis effects in La1.85Sr0.15CuO4 that resemble superconductivity signatures but persist well above the superconducting transition temperature, indicating complex normal-state magnetic properties.

Contribution

It provides detailed magnetic and thermal hysteresis data showing superconductivity-like effects in the normal state of La1.85Sr0.15CuO4, a novel observation.

Findings

Magnetic signatures similar to superconductivity observed up to 250 K

Hysteresis effects depend on thermal history and magnetic field conditions

Normal state exhibits complex magnetic behavior resembling superconducting properties

Abstract

We have performed detailed magnetic and thermal hysteresis experiments in the normal-state magnetization of La1.85Sr0.15CuO4 single crystal. Using a combination of in-field and in-zero-magnetic-field measurements at different stages of thermal history of the sample, we identified subtle effects associated with the presence of magnetic signatures which resemble those below the superconducting transition temperature (Tc=36 K) but survive up to 250 K.