NMR Investigation of Superconductivity and Antiferromagnetism in CaFe2As2 under Pressure
S.-H. Baek, H. Lee, S. E. Brown, N. J. Curro, E. D. Bauer, F. Ronning, T. Park, J. D. Thompson
DOI 10.1103/PhysRevLett.102.227601 · Physical Review Letters
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Abstract
We report As75 NMR measurements in CaFe2As2, made under applied pressures up to 0.83 GPa produced by a standard clamp pressure cell. Our data reveal phase segregation of paramagnetic and antiferromagnetic (AFM) phases over a range of pressures, with the AFM phase more than 90% dominant at low temperatures. In situ rf susceptibility measurements indicate the presence of superconductivity. As75 spin-lattice relaxation experiments indicate that the As75 nuclei sample the superconductivity while in the magnetically ordered environment.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| CaFe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 7.2 | 0.5 GPa | onset |
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