Magnetic phases of Josephson vortices in Bi2Sr 2CaCu2O8+y

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

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

Abstract

Josephson vortex (JV) states in Bi2Sr2CaCu 2O8+y (Bi-2212) have been studied by measuring the flow resistivity of JV's and I-V characteristics with a current along the c-axis. In the flow resistivity, periodic oscillations have been found as a function of the parallel magnetic field to the superconducting layers. As this phenomenon is related to the formation of a triangular lattice of JV's as the ground state, the 3D-ordered state (triangular lattice phase) of JV's could be determined. With changing the doping level of Bi-2212, the BD-ordered phase is shifted towards a higher magnetic field and a higher temperature, which is well explained from the theoretical analyses. Above the 3D-ordered phase, vortex state has been studied with I-V characteristic measurements, in which the voltage shows a distinct change in the exponent of the power-law dependence to the current between two phases. This suggests that the 3D-ordered phase changes to the disordered phase along the c-axis.

Original languageEnglish
Title of host publicationLOW TEMPERATURE PHYSICS
Subtitle of host publication24th International Conference on Low Temperature Physics - LT24
Pages913-914
Number of pages2
DOIs
Publication statusPublished - 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

  • BiSrCaCu O
  • Flow resistance
  • Josephson vortex
  • Magnetic phase

ASJC Scopus subject areas

  • General Physics and Astronomy

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