論文

査読有り
2012年5月

Ratchet Effect of Single Vortex Motion in Superconducting Asymmetrical Nanobridges

JAPANESE JOURNAL OF APPLIED PHYSICS
  • Kemmei Kajino
  • ,
  • Keisuke Fujita
  • ,
  • Baoyu An
  • ,
  • Masumi Inoue
  • ,
  • Akira Fujimaki

51
5
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1143/JJAP.51.053101
出版者・発行元
IOP PUBLISHING LTD

We have successfully obtained asymmetrical current-voltage (I-V) characteristics in YBa2Cu3O7-x (YBCO) nanobridges patterned with asymmetrical geometry. These asymmetrical nanobridges (ANBs) are shown to control vortices one at a time. The critical current I-c, of 200-nm-wide and 100-nm-thick ANB changes by a maximum of 9% when a magnetic field of 2.4 mT is applied. The I-c variation Delta I-c increases monotonically with increased magnetic field from -2.2 to 2.4 mT. The asymmetrical I-V characteristics obtained in our experiment are due to the restriction of vortex motion by the asymmetrical surface barrier (the so-called vortex ratchet effect). The width and thickness dependencies of the I-V asymmetry are also studied, and indicate that the bias current and the Meissner screening current, determined by the relative width compared to the effective penetration depth of the YBCO film, dominates the I-V asymmetry characteristics. (C) 2012 The Japan Society of Applied Physics

Web of Science ® 被引用回数 : 4

リンク情報
DOI
https://doi.org/10.1143/JJAP.51.053101
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000303930200023&DestApp=WOS_CPL
ID情報
  • DOI : 10.1143/JJAP.51.053101
  • ISSN : 0021-4922
  • eISSN : 1347-4065
  • Web of Science ID : WOS:000303930200023

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