Emergence of superconductivity at 45 K by lanthanum and phosphorus co-doping of CaFe2 As2

Kazutaka Kudo, Keita Iba, Masaya Takasuga, Yutaka Kitahama, Jun Ichi Matsumura, Masataka Danura, Yoshio Nogami, Minoru Nohara

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Abstract

Co-doping of lanthanum and phosphorus in CaFe2 As2 induces superconductivity at 45 K. This superconducting transition temperature is higher than the 38 K transition in Ba 1-x Kx Fe 2 As2, 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-x La x Fe2 (As 1-y P y) 2. The superconducting phase of the present system seems to be not adjacent to an antiferromagnetic phase.

Original languageEnglish
Article number1478
JournalScientific reports
Volume3
DOIs
Publication statusPublished - Apr 10 2013

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