Vortex matching effect in engineered thin films of NbN

Thakur, Ajay D.; Shuuichi Ooi; Chockalingam, Subbaiah P.; Jesudasan, John; Raychaudhuri, Pratap; Hirata, Kazuto
June 2009
Applied Physics Letters;6/29/2009, Vol. 94 Issue 26, p262501
Academic Journal
We report robust vortex matching effects in antidot arrays fabricated on thin films of NbN. The near absence of hysteresis between field sweep directions indicates a negligible residual pinning in the host thin films. Owing to the very small coherence length of NbN thin films (ξ<5 nm), the observations suggest the possibility of probing physics of vortices at true nanometer length scales in suitably fabricated structures.


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