Journal
JETP LETTERS
Volume 93, Issue 2, Pages 94-98Publisher
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S0021364011020111
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- Russian Foundation for Basic Research
- Russian Ministry of Education and Science
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We have studied current-voltage characteristics of Andreev contacts in polycrystalline GdO0.88F0.12FeAs samples with bulk critical temperature T (c) = (52.5 +/- 1) K using break-junction technique. The data obtained can- not be described within the single-gap approach and suggests the existence of a multi-gap superconductivity in this compound. The large and small superconducting gap values estimated at T = 4.2 K are Delta (L) = 10.5 +/- 2 meV and Delta (s) = 2.3 +/- 0.4 meV, respectively.
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