Evidence for a temperature dependent anisotropy of the superconducting state parameters in underdoped SmBa2Cu3Ox

Details Evidence for a temperature dependent anisotropy of the superconducting state parameters in underdoped SmBa2Cu3Ox Evidence for a temperature dependent anisotropy of the superconducting state parameters in underdoped SmBa2Cu3Ox

2010-07-19

arxiv.org/abs/1007.3152v1

Phys. Rev. B 82, 054510 (2010)

Physics

Condensed Matter

Superconductivity

21 pages, 4 figures, accepted for publication in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.82.054510

The temperature dependence of the anisotropy of the superconducting state parameters, {\gamma}, was studied by torque magnetometry for the high temperature superconductor SmBa2Cu3Ox in magnetic fields of up to 9 T. The measurements were performed on four underdoped single crystals with oxygen contents corresponding to Tc's varying from 42.8 to 63.6 K. The anisotropy was found to be strongly temperature dependent, while only a weak dependence on the magnetic field was observed. No evidence for a field dependent superfluid density was found. Possible origins of the temperature dependence of the anisotropy are discussed.

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