Search for pressure induced superconductivity in CeFeAsO and CeFePO iron pnictides
Diego A. Zocco, Ryan E. Baumbach, James J. Hamlin, Marc Janoschek, Ivy, K. Lum, Michael A. McGuire, Athena S. Sefat, Brian C. Sales, Rongying Jin,, David Mandrus, Jason R. Jeffries, Samuel T. Weir, Yogesh K. Vohra, and M., Brian Maple
TL;DR
This study investigates whether applying high pressure induces superconductivity in CeFeAsO and CeFePO iron pnictides, finding no superconductivity in CeFeAsO up to 50 GPa but pressure effects on magnetic properties in CeFePO.
Contribution
It provides the first high-pressure electrical transport measurements on CeFeAsO and CeFePO, revealing their magnetic phase stability and absence of pressure-induced superconductivity.
Findings
CeFeAsO shows coexistence of magnetic phases up to 15 GPa.
No signs of superconductivity in CeFeAsO up to 50 GPa.
Pressure stabilizes Kondo screening in CeFePO.
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 up to 15 GPa, with no signs of pressure-induced superconductivity up to 50 GPa. For the CeFePO single crystals, pressure stabilizes the Kondo screening of the Ce 4f-electron magnetic moments.
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