C-axis critical current of a PrFeAsO0.7 single crystal

Kashiwaya, H.; Shirai, K.; Matsumoto, T.; Shibata, H.; Kambara, H.; Ishikado, M.; Eisaki, H.; Iyo, A.; Shamoto, S.; Kurosawa, I.; Kashiwaya, S.
May 2010
Applied Physics Letters;5/17/2010, Vol. 96 Issue 20, p202504
Academic Journal
The c-axis transport properties of a high-pressure synthesized PrFeAsO0.7 single crystal are studied using s-shaped junctions. Resistivity anisotropy of about 120 detected at 50 K shows the presence of strong anisotropy in the electronic states. The obtained critical current density for the c-axis of 2.9×105 A/cm2 is two orders of magnitude larger than that in Bi2Sr1.6La0.4CuO6+δ. The appearance of a hysteresis in the current-voltage curve below Tc is the manifestation of the intrinsic Josephson effect similar to that in cuprate superconductors. The suppression of the critical current-normal resistance (IcRn) product is explained by an inspecular transport in s±-wave pair potential.


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