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Emergence of superconductivity at 45 K by lanthanum and phosphorus co-doping of CaFe₂As₂.


ABSTRACT: Co-doping of lanthanum and phosphorus in CaFe₂As₂ induces superconductivity at 45 K. This superconducting transition temperature is higher than the 38 K transition in Ba₁-xKxFe₂As₂, which is the maximum found thus far among the 122 phases. Superconductivity with a substantial shielding volume fraction was observed at 0.12 ≤ x ≤ 0.18 and y = 0.06 in Ca₁-xLaxFe₂(As₁-yPy)₂. The superconducting phase of the present system seems to be not adjacent to an antiferromagnetic phase.

SUBMITTER: Kudo K 

PROVIDER: S-EPMC3600592 | biostudies-other | 2013

REPOSITORIES: biostudies-other

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