Pressure dependence of superconducting and magnetic critical temperatures in the ruthenocuprates

TL;DR

This study investigates how pressure and electron filling influence the superconducting and magnetic critical temperatures in ruthenocuprates using a two-band model, revealing coexistence regions and pressure effects.

Contribution

It introduces a detailed analysis of pressure and filling dependence in ruthenocuprates, highlighting the interplay between superconductivity and ferromagnetism within a two-band framework.

Findings

Coexistence of superconductivity and ferromagnetism varies with filling.

Pressure enhances magnetic phase more than superconducting critical temperature.

Comparison with experiments supports the model's predictions.

Abstract

We study the dependence on filling and pressure of the superconducting and ferromagnetic critical temperatures of the ruthenocuprates, within the two-band model. At zero pressure, we find separate regions of coexistence of superconductivity and ferromagnetism as a function of filling, with contiguous regions merging together as pressure increases. As a function of pressure, a stronger enhancement of the magnetic phase results in a reduced pressure effect on the superconducting critical temperature. Comparison with recent experiments on the determination of the critical temperatures as a function of the pressure is also discussed.