Magnetic structure of CeRhIn_5 as a function of pressure and temperature

TL;DR

This study investigates how the magnetic structure of CeRhIn₅ evolves under pressure and its relation to the emergence of superconductivity, providing insights into the interplay between magnetism and unconventional superconductivity.

Contribution

It offers detailed neutron-diffraction and resistivity data on CeRhIn₅ under pressure, revealing the weak pressure dependence of magnetic order and its coexistence with superconductivity.

Findings

Magnetic structure changes weakly up to 1.63 GPa

Bulk superconductivity appears at 1.63 GPa

Constraints on the magnetism-superconductivity relationship in CeRhIn₅

Abstract

We report magnetic neutron-diffraction and electrical resistivity studies on single crystals of the heavy-fermion antiferromagnet CeRhIn$_{5}$ at pressures up to 2.3 GPa. These experiments show that the staggered moment of Ce and the incommensurate magnetic structure change weakly with applied pressure up to 1.63 GPa, where resistivity, specific heat and NQR measurements confirm the presence of bulk superconductivity. This work places new constraints on an interpretation of the relationship between antiferromagnetism and unconventional superconductivity in CeRhIn$_{5}$.