A model for coexistent superconductivity and ferromagnetism

TL;DR

This paper presents a mean field model demonstrating the coexistence of superconductivity and ferromagnetism, analyzing their temperature dependencies, thermodynamic properties, and comparing specific heat predictions with experimental data.

Contribution

It introduces a mean field model with s-wave pairing and ferromagnetic order, showing coexistence is energetically favored and providing a phase diagram.

Findings

Coexistence state is energetically favored over other states.

Developed a simple phase diagram for the system.

Compared specific heat predictions with experimental results.

Abstract

We explore various temperature dependencies and thermodynamic quantities of a mean field model of a ferromagnetic-superconducting system. The starting point for this model is based on an s-wave pairing scheme in the singlet channel of the superconducting state and a spontaneously broken symmetry phase in the ferromagnetic state. We show numerically and analytically that a state of coexistence reveals itself and is favored energetically over other possible states, and a simple phase diagram is developed. Finally, a comparison of the specific heat with experiment is shown.