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, and H. F. Hess
Phys. Rev. Lett. 71, 3007 – Published 1 November 1993
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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.

  • Received 14 June 1993

DOI:https://doi.org/10.1103/PhysRevLett.71.3007

©1993 American Physical Society

Authors & Affiliations

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

  • AT&T Bell Laboratories, Murray Hill, New Jersey 07974-0636

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Vol. 71, Iss. 18 — 1 November 1993

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