Observation of Hexagonally Correlated Flux Quanta In YBa2Cu3O7

[[abstract]]The high-resolution Bitter pattern technique has been used to reveal the magnetic structure of single-crystal samples of high-Tc superconductor YBa2Cu3O7 at 4.2 K. Typical patterns consist of hexagonally correlated, singly quantized vortices of flux hc/2e. That is, the structures are comparable to those that would be observed in conventional type-II superconductors under similar conditions.[[fileno]]2010113010055[[department]]物理