Piezomagnetism in ferromagnetic superconductors

TL;DR

This paper explores the phenomenon of piezomagnetism in ferromagnetic superconductors like UGe_2, URhGe, and UCoGe, highlighting how their unique symmetry allows for piezomagnetic effects and how superconducting states exhibit specific behaviors.

Contribution

It identifies and analyzes the occurrence of piezomagnetism in uranium ferromagnetic superconductors, emphasizing their unique symmetry and superconducting state properties.

Findings

Piezomagnetism occurs in ferromagnetic superconductors due to their symmetry.

Superconducting state exhibits specific piezomagnetic behaviors distinct from normal state.

Critical temperature varies with magnetic field direction in uranium ferromagnets.

Abstract

The appearance of magnetization during the application of mechanical stress and the creation of elastic deformation during the application of a magnetic field are two fundamental properties of piezomagnetic materials. The symmetry of superconducting ferromagnets UGe_2, URhGe, UCoGe allows piezomagnetism. In addition to conventional piezomagnetic properties occurring in both normal and superconducting states, superconducting state of these piezomagnets has its own specificity. Unlike conventional superconductors, in uranium ferromagnets, the critical transition temperature to the superconducting state changes its value when the direction of the field changes to the opposite.