Abnormal magnetoresistance behavior in Nb thin films with rectangular arrays of antidots

Wei Jun Zhang, Shi Kun He, Bo Hong Li, Fei Cheng, Bing Xu, Zhen Chao Wen, Wen Hui Cao, Hong Xiao, Xiu Feng Han, Shi Ping Zhao, Xiang Gang Qiu

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Magnetoresistance in superconducting Nb films perforated with rectangular arrays of antidots (holes) is investigated at various temperatures and currents. Normally, the magnetoresistance increases with the increasing magnetic field. In this paper, we report a reverse behavior in a certain range of high fields after vortex reconfiguration transition, where the resistances at non-matching fields are smaller than those in the low field regime. This phenomenon is due to a strong caging effect, in which the interstitial vortices are trapped among the pinned multiquanta vortices. This effect is temperature and current dependent.

Original languageEnglish
Article number077401
JournalChinese Physics B
Volume21
Issue number7
DOIs
Publication statusPublished - 2012 Jul
Externally publishedYes

Keywords

  • caging effect
  • magnetoresistance
  • rectangular arrays of antidots

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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