Magnetism and superconductivity in CeRh_{1-x}Ir_xIn_5 heavy fermion materials

Details Magnetism and superconductivity in CeRh_{1-x}Ir_xIn_5 heavy fermion materials Magnetism and superconductivity in CeRh_{1-x}Ir_xIn_5 heavy fermion materials

2003-01-16

arxiv.org/abs/cond-mat/0301309v2

Physica B 326, 390 (2003)

Physics

Condensed Matter

Superconductivity

6 pages with 3 figures. Revision with corrected axis label (mK) in Fig.1

Scientific paper

10.1016/S0921-4526(02)01640-X

We report on zero-field muon spin relaxation studies of cerium based heavy-fermion materials CeRh_{1-x}Ir_xIn_5. In the superconducting x=0.75 and 1 compositions muon spin relaxation functions were found to be temperature independent across T_c; no evidence for the presence of electronic magnetic moments was observed. The x=0.5 material is antiferromagnetic below T_N=3.75 K and superconducting below T_c=0.8 K. Muon spin realxation spectra show the gradual onset of damped coherent oscillations characteristic of magnetic order below T_N. At 1.65 K the total oscillating amplitude accounts for at least 85% of the sample volume. No change in muon precession frequency or amplitude is detected on cooling below T_c, indicating the microscopic coexistence of magnetism and superconductivity in this material.

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