Magnetism and superconductivity in CeRh1-xIrxIn5 heavy fermion materials

G. D. Morris, R. H. Heffner, J. E. Sonier, D. E. MacLaughlin, O. O. Bernal, G. J. Nieuwenhuys, A. T. Savici, P. G. Pagliuso, J. L. Sarrao

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Abstract

We report zero-field-μSR studies of cerium-based heavy-fermion materials CeRh1-xIrxIn5. In the superconducting x = 0.75 and 1.0 compositions, muon spin relaxation functions were found to be temperature independent across Tc; no evidence for the presence of electronic magnetic moments was observed. The x = 0.5 material is antiferromagnetic below TN = 3.75 K and superconducting below Tc = 0.8 K. μSR spectra show the gradual onset of damped coherent oscillations characteristic of magnetic order below TN. At 1.65 K the total oscillating amplitude accounts for at least 85% of the sample volume. No change in precession frequency or amplitude is detected on cooling below Tc, indicating the microscopic coexistence of magnetism and superconductivity in this material.

Original languageEnglish
Pages (from-to)390-393
Number of pages4
JournalPhysica B: Physics of Condensed Matter
Volume326
Issue number1-4
DOIs
StatePublished - Feb 2003
Externally publishedYes

Funding

This work was supported in part by US NSF grants DMR-0102293 (UC Riverside) and DMR-9820631 (CSU Los Angeles). JES acknowledges support from the Natural Sciences and Engineering Research Council (NSERC) and the Canadian Institute for Advanced Research. Work at Los Alamos was performed under the auspices of the US Department of Energy, Office of Science.

FundersFunder number
National Science FoundationDMR-9820631, DMR-0102293
Canadian Institute for Advanced Research
Natural Sciences and Engineering Research Council of Canada

    Keywords

    • CeMIn
    • F-electron magnetism
    • Heavy-fermion
    • Superconductivity

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