Doping – Dependent irreversible magnetic properties of Ba(Fe1−xCox)2As2 single crystals

  title={Doping – Dependent irreversible magnetic properties of Ba(Fe1−xCox)2As2 single crystals},
  author={Ruslan Prozorov and Makariy A. Tanatar and E. C. Blomberg and Plengchart Prommapan and R. T. Gordon and Ni Ni and Sergey L. Bud’ko and Paul C. Canfield},
  journal={Physica C-superconductivity and Its Applications},
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A key role for unusual spin dynamics in ferropnictides
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Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2.
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The observed low-temperature variation of lambda(T) follows a power law, Deltalambda(T), approximately T(n) with n approximately 2.4+/-0.1, indicating the existence of normal quasiparticles down to at least 0.02T(c), in contrast with previous penetration depth measurements on single crystals, which indicate an anisotropic but nodeless gap.