We investigate the effect of the anisotropy and of the directional pinning in YBa2Cu3O7−xfilms grown by pulsed laser ablation from targets containing BaZrO3at 5 mol%. BaZrO3inclusions self-assemble to give nanorods oriented along the c-axis, thus giving a preferential direction for vortex pinning. The directionality of vortex response is studied at high ac frequency with the complex microwave response at 48 GHz, as a function of the applied field and of the angle θ between the field and the c-axis. The complex microwave response does not exhibit any angular scaling, suggesting that the structural anisotropy of YBa2Cu3O7−xis supplemented by at least another preferred orientation. The pinning parameter r shows evidence of directional pinning, effective in a wide range of angles around the c-axis (thus ascribed to BZO nanocolumns).
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
Pompeo, N., Torokhtii, K., Augieri, A., Celentano, G., Galluzzi, V., & Silva, E. (2013). Directional vortex pinning at microwave frequency in YBa. Journal of Superconductivity and Novel Magnetism, 26(5), 2093 - 2097. https://doi.org/10.1007/s10948-012-2060-9