Synergetic pinning centres in BaZrO3-doped YBa2Cu3O7-x films induced by SrTiO3 nano-layers

Modeling flux pinning in thin undoped and BazRo3-doped YBCO films

Strong Reduction of the Field-Dependent Microwave Surface Resistance in YBCO with BaZrO3 Inclusions

We present measurements of the magnetic field dependent microwave surface resistance in laser-ablated YBa2Cu3O7−δ films on SrTiO3 substrates. BaZrO3 crystallites were included in the films using composite targets containing BaZrO3 inclusions with mean grain size smaller than 1 μm. X-ray diffraction showed single epitaxial relationship between BaZrO3 and YBa2Cu3O7−δ. The effective surface resist...

FLUX PINNING ENHANCEMENT IN YBa2Cu3O7-x FILMS FOR COATED CONDUCTOR APPLICATIONS (POSTPRINT)

Thermoelectric La-doped SrTiO3 epitaxial layers with single-crystal quality: from nano to micrometers

High-quality thermoelectric La0.2Sr0.8TiO3 (LSTO) films, with thicknesses ranging from 20 nm to 0.7 μm, have been epitaxially grown on SrTiO3(001) substrates by enhanced solid-source oxide molecular-beam epitaxy. All films are atomically flat (with rms roughness < 0.2 nm), with low mosaicity (<0.1°), and present very low electrical resistivity (<5 × 10-4 Ω cm at room temperature), one order of ...

Smectic vortex phase in optimally doped YBa2Cu3O7 thin films.

Angular dependent resistivity measurements of optimally doped YBa2Cu3O7 films in fields H pulsed to 50 T are presented. Up to the highest H, the vortex melting field Hm increases and vortex motion is reduced for H aligned with the correlated pinning centers along the main crystalline axes, otherwise 3D anisotropic scaling describes the vortex dynamics. For H parallel ab, the rapid increase in H...