Induced in-plane order in the vortex liquid by periodic pinning arrays

S. Ooi, T. Mochiku, S. Yu, E. S. Sadki, K. Hirata

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The vortex phase diagram of high-Tc superconductors in the field parallel to the c-axis have been already extensively explored. It has been commonly observed that pinning effects are quite weak at high temperatures and high fields in high quality single crystals. Such weak pinning phases, like the vortex liquid and the Bragg glass, are good candidate to study the influence of additional artificial pinning arrays on vortex phases, because the original quenched disorders do not work well as effective pinning centers in these phases. We have introduced several types of hole arrays in Bi2Sr 2CaCu2O8+y single-crystal thin film using a focused ion beam. To preserve the quality of the crystals we have made film samples from bulk crystals by the cleaving. In samples with triangular and square pinning arrays of 1μm lattice spacing, the flow resistance of pancake vortices exhibit a matching effect at multiples of the matching fields. This matching effect occurs in the vortex liquid phase. It is difficult to explain these results by the idea of the normal vortex liquid because of the lack of in-plane symmetries. There is a possibility that the in-plane order is induced in the vortex liquid by the introduction of the periodic pinning arrays.

Original languageEnglish
Title of host publicationLOW TEMPERATURE PHYSICS
Subtitle of host publication24th International Conference on Low Temperature Physics - LT24
Pages849-850
Number of pages2
DOIs
Publication statusPublished - Dec 1 2006
Externally publishedYes
EventLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24 - Orlando, FL, United States
Duration: Aug 10 2006Oct 17 2006

Publication series

NameAIP Conference Proceedings
Volume850
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24
Country/TerritoryUnited States
CityOrlando, FL
Period8/10/0610/17/06

Keywords

  • Artificial periodic defects
  • BiSr CaCuO
  • FIB
  • Matching effect

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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