Effect of BaSnO3 Nanoparticle Inclusion on Critical Current Density of GdBa2Cu3O7-Thin Films

• Main Authors: Duong, Thi Thanh Nhan, Tran, Hai Duc
• Format: Article
• Language: English
• Published: H. : ĐHQGHN 2017
• Subjects: GdBCO thin film; critical current density; BaSnO3; artificial pinning centers
• Online Access: http://repository.vnu.edu.vn/handle/VNU_123/56209
• Institution: Vietnam National University, Hanoi

Effect of BaSnO3 (BSO) nanoparticle inclusion on the critical current density of GdBa2Cu3O7-x (GdBCO) thin films was investigated. BSO nanoparticles were prepared on a thin GdBCO seed layer of < 50 nm thick by using pulsed laser deposition (PLD) technique. The GdBCO superconducting layers were deposited on top of the BSO nanoparticles to produce films with the entire thickness of approximately 250 nm[O1] . The number of laser pulses was varied from 20 to 320 in order to obtain BSO nanoparticles with different sizes and densities. Magnetization data measured at 65 K showed that: at a small number of laser pulses, the slight enhancement in critical current density (Jc) up to 1.5 T was obtained. Further increasing the number of laser pulses, Jcs were found to be consistently decreased. The increase in Jc was attributed to the addition of BSO nanoparticles serving as artificial pinning centers (APCs) inside GdBCO films. The decreases in Jc was probably caused by to the crystallinity degradation of the BSO-doped GdBCO films which was confirmed by the larger FHWM values.