We present a microwave study of the angular dependence of the flux-flow resistivity ρ ff and of the pinning constant k p in YBCO thin films containing BZO nanorods. We find that BZO nanorods are very efficient pinning centers, even in tilted fields. We find that ρ ff is a scaling function of a reduced field H/f(θ). We extend a model for the anisotropic motion of vortices in uniaxially anisotropic superconductor, able to describe the experimental f(θ) on the basis of only the intrinsic anisotropy of YBCO. The pinning constant k p, by contrast, exhibits different field dependences in different angular ranges, consistent with pinning by BZO at angles as large as 60°, and with pinning along the a,b planes as originating from the same mechanism as in pure YBCO with the field along the c axis. © 2012 Elsevier B.V. All rights reserved.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering
Pompeo, N., Rogai, R., Torokhtii, K., Augieri, A., Celentano, G., Galluzzi, V., & Silva, E. (2012). Angular dependence of the high-frequency vortex response in YBa. Physica C: Superconductivity and its Applications, 479, 160 - 163. https://doi.org/10.1016/j.physc.2011.12.008