Applied Physics Letters · 2004 · 78 citations · 14 references
Natural SciencesMaterials SciencePhysicsCondensed Matter PhysicsElectromagnetismMagnetic MaterialsFerromagnetismMagnetic CharacterizationMagnetic Properties Of SolidsMagnetism In SolidsSuperconducting MaterialsSuperconducting Thin FilmsCritical Current DensityCurrent DensityFlux PinningGrain BoundariesMagnetic Field EffectsMagnetic Materials CharacterizationMagnetic Property CharacterizationMagnetization Measurement
An inductive methodology simultaneously enabling the determination of grain- and intergrain critical current densities of YBa2Cu3O7−x coated conductors is developed. This noninvasive method is based on the identification of a clear peak in the reverse branch of the magnetization loop at a positive magnetic field, as a signature of the electromagnetic granularity inherent to these materials. A quantitative evaluation of the return magnetic field at the grain boundaries allows us to understand the existence of this magnetization peak and quantify the grain critical current density. This methodology is envisaged to sort out granularity effects from vortex pinning effects on coated conductors.
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Low angle grain boundary transport in YBa2Cu3O7−δ coated conductors
D. T. Verebelyi, D. K. Christen, R. M. Feenstra et al. · Applied Physics Letters · 2000 · 172 citations