Control of BaZrO3 Nanorod Alignment in YBa2Cu3O7-x Thin Films by Microstructural Modulation (POSTPRINT)

摘要

The alignment of BaZrO3-nanorods (BZO-NR) in YBa2Cu3O7-x was studied using vicinal substrates to modulate the microstructure. As the vicinal angle was increased to 10 degrees, the angular splay of BZO-NRs increased. Correspondingly, the vortex pinning along the c-axis increased slightly, a possible consequence of enhanced vortex entanglement. Up to 10 degrees, an increasing density of planar defects was observed, while at approximately 20 degrees an orthogonal reorientation of the BZO-NRs along the a-b planes occurs. This suggests that the modulated microstructure introduces a competing effect on the BZO-NR formation and alignment, and beyond a critical vicinal angle, c-axis alignment is no longer favorable for BZO-NRs.