The influence of the geometric characteristics of nanorods on the flux pinning in high-performance BaMO3-doped SmBa2Cu3Oy films (M = Hf, Sn)

作者：Tsuruta A^*; Yoshida Y; Ichino Y; Ichinose A; Matsumoto K; Awaji S

来源：Superconductor Science and Technology, 2014, 27(6): 065001.

DOI：10.1088/0953-2048/27/6/065001

• BaHfO3
• flux pinning
• SmBa2Cu3Oy
• thin film

Recently, the BaHfO3 (BHO) nanorod has attracted attention as a new c-axis-correlated pinning center in REBa2Cu3Oy films. We fabricated SmBa2Cu3Oy (SmBCO) films with BHO nanorods using an alternating-targets technique with pulsed laser deposition on single-crystal LaAlO3(100) substrates, and then compared the microstructure and flux pinning properties with those of BaSnO3(BSO)-doped SmBCO films. Transmission electron microscopy observations indicated that the BHO and BSO nanorods both grew straight, but the inclination of the BHO nanorods from the c-axis of the SmBCO was less than that of the BSO nanorods. The inclination had a strong influence on the flux pinning property.

• 出版日期2014-6