Observation of Hexagonally Correlated Flux Quanta In Y<math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">Ba</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">Cu</mi></mrow><mrow><mn>3</mn></mrow></msub></mrow></math><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">O</mi></mrow><mrow><mn>7</mn></mrow></msub></mrow></math>

P. L. Gammel; D. J. Bishop; G. J. Dolan; J. R. Kwo; C. A. Murray; L. F. Schneemeyer; J. V. Waszczak

doi:10.1103/PhysRevLett.59.2592

Observation of Hexagonally Correlated Flux Quanta In Y ${Ba}_{2}$ ${Cu}_{3}$ $O_{7}$

P. L. Gammel, D. J. Bishop, G. J. Dolan, J. R. Kwo, C. A. Murray, L. F. Schneemeyer, and J. V. Waszczak

Phys. Rev. Lett. 59, 2592 – Published 30 November 1987

Abstract

The high-resolution Bitter pattern technique has been used to reveal the magnetic structure of single-crystal samples of high- $T_{c}$ superconductor Y ${Ba}_{2}$ ${Cu}_{3}$ $O_{7}$ at 4.2 K. Typical patterns consist of hexagonally correlated, singly quantized vortices of flux $\frac{hc}{2 e}$ . That is, the structures are comparable to those that would be observed in conventional type-II superconductors under similar conditions.