Direct spatial imaging of vortices in a superconducting wire network

H. D. Hallen, R. Seshadri, A. M. Chang, R. E. Miller, L. N. Pfeiffer, K. W. West, C. A. Murray, H. F. Hess

Research output: Contribution to journalArticlepeer-review

50 Scopus citations

Abstract

We report direct observations of vortices in a square superconducting wire grid imaged using scanning Hall probe microscopy. Real space images of vortex configurations are obtained as a function of the flux per unit cell f by measuring the local magnetic field just above the sample. At f=1/2 we observe domains of the checkerboard ground state. As f is reduced from 1/2 to 1/3 vacancies first penerate the grain boundaries and then the checkerboard domains. Near f=1/3 we observe domains of the 1/3 staircase ground state. Heating the sample close to Tc produces correlated vortex hopping.

Original languageEnglish (US)
Pages (from-to)3007-3010
Number of pages4
JournalPhysical review letters
Volume71
Issue number18
DOIs
StatePublished - 1993
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy

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