Superconducting Transition and Vortex Pinning in Nb Films Patterned with Nano-scale Hole-arrays

U. Welp; Z. L. Xiao; J. S. Jiang; V. K. Vlasko-Vlasov; S. D. Bader; G. W. Crabtree; J. Liang; H. Chik; J. M. Xu

doi:10.1103/PhysRevB.66.212507

Superconducting Transition and Vortex Pinning in Nb Films Patterned with Nano-scale Hole-arrays

Superconductivity 2009-11-07 v1

Authors: U. Welp , Z. L. Xiao , J. S. Jiang , V. K. Vlasko-Vlasov , S. D. Bader , G. W. Crabtree , J. Liang , H. Chik , J. M. Xu

View on arXiv ↗ PDF ↗ DOI ↗

Abstract

Nb films containing extended arrays of holes with 45-nm diameter and 100-nm spacing have been fabricated using anodized aluminum oxide (AAO) as substrate. Pronounced matching effects in the magnetization and Little-Parks oscillations of the superconducting critical temperature have been observed in fields up to 9 kOe. Flux pinning in the patterned samples is enhanced by two orders of magnitude as compared to unpatterned reference samples in applied fields exceeding 5 kOe. Matching effects are a dominant contribution to vortex pinning at temperatures as low as 4.2 K due to the extremely small spacing of the holes.

Keywords

Nb film nano-hole array superconducting transition vortex pinning Little-Parks oscillation magnetization

Cite

@article{arxiv.cond-mat/0204535,
  title  = {Superconducting Transition and Vortex Pinning in Nb Films Patterned with Nano-scale Hole-arrays},
  author = {U. Welp and Z. L. Xiao and J. S. Jiang and V. K. Vlasko-Vlasov and S. D. Bader and G. W. Crabtree and J. Liang and H. Chik and J. M. Xu},
  journal= {arXiv preprint arXiv:cond-mat/0204535},
  year   = {2009}
}

Superconducting Transition and Vortex Pinning in Nb Films Patterned with Nano-scale Hole-arrays

Abstract

Keywords

Cite

Related papers