Magnetic structure of CeRhIn_5 as a function of pressure and temperature

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${}_5$.

6 pages, 6 figures, submitted to Phys. Rev. B

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• Effective Low-Energy Model for f-Electron Delocalization