Search for pressure-induced superconductivity in CeFeAsO and CeFePO iron pnictides

D. A. Zocco, R. E. Baumbach, J. J. Hamlin, M. Janoschek, I. K. Lum, M. A. McGuire, A. S. Sefat, B. C. Sales, R. Jin, D. Mandrus, J. R. Jeffries, S. T. Weir, Y. K. Vohra, and M. B. Maple

Phys. Rev. B 83, 094528 – Published 25 March 2011

Abstract

The CeFeAsO and CeFePO iron pnictide compounds were studied via electrical transport measurements under high pressure. In CeFeAsO polycrystals, the magnetic phases involving the Fe and Ce ions coexist for hydrostatically applied pressures up to 15 GPa, and with no signs of pressure-induced superconductivity up to 50 GPa for the less hydrostatic pressure techniques. For the CeFePO single crystals, pressure further stabilizes the Kondo screening of the Ce 4 $f$ -electron magnetic moments.

Received 24 November 2010

DOI:https://doi.org/10.1103/PhysRevB.83.094528

Authors & Affiliations

D. A. Zocco¹, R. E. Baumbach¹, J. J. Hamlin¹, M. Janoschek¹, I. K. Lum¹, M. A. McGuire², A. S. Sefat², B. C. Sales², R. Jin², D. Mandrus², J. R. Jeffries³, S. T. Weir³, Y. K. Vohra⁴, and M. B. Maple¹

¹Department of Physics, University of California, San Diego, La Jolla, California 92093, USA
²Materials Science & Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
³Lawrence Livermore National Laboratory, Livermore, California 94551, USA
⁴Department of Physics, University of Alabama at Birmingham, Birmingham, Alabama 35294, USA

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Vol. 83, Iss. 9 — 1 March 2011

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