Interaction Between Superconducting and Ferromagnetic Order Parameters in Graphite-Sulfur Composites

TL;DR

This paper investigates the coexistence and interaction of superconducting and ferromagnetic order parameters in graphite-sulfur composites, revealing anisotropic superconductivity and a crossover influenced by magnetic field and temperature.

Contribution

It demonstrates the interaction between superconducting and ferromagnetic states in graphite-sulfur composites through angular dependence measurements.

Findings

Superconductivity is highly anisotropic and linked to graphite planes.

Superconducting and ferromagnetic states coexist in the material.

Interaction between order parameters affects magnetic behavior.

Abstract

The superconductivity of graphite-sulfur composites is highly anisotropic and associated with the graphite planes. The superconducting state coexists with the ferromagnetism of pure graphite, and a continuous crossover from superconducting to ferromagnetic-like behavior could be achieved by increasing the magnetic field or the temperature. The angular dependence of the magnetic moment m(alpha) provides evidence for an interaction between the ferromagnetic and the superconducting order parameters.