Infrared pulsed laser deposition of yttrium doped BSCCO superconducting films

• Published in: Advances in Optoelectronics and Micro/nano-optics pp. 1 - 3
• Main Authors: De Vero, J C, Blanca, G R S, Vitug, J R, Garcia, W O, Sarmago, R V
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01-12-2010
• Subjects: BSCCO; Doping; Heat treatment; Pulsed laser deposition; Substrates; superconductor; Yttrium
• ISBN: 9781424483938; 142448393X
• DOI: 10.1109/AOM.2010.5713508

High T c superconducting Bi 2 Sr 2 Ca 1-x Y x Cu 2 O 8+δ (Bi-22Y2) with 0.25≤x≤0.49 were deposited on MgO (100) by infrared (1064 nm) pulsed laser deposition with subsequent heat treatments. As- deposited films were partially melted and subsequently annealed in ambient air. The as-deposited films exhibit spheriodal morphology but maintain the stoichiometry of the target. After heat treatments steps, relatively smooth and flat films were achieved. Grain boundaries become more apparent at higher yttrium doping. The films are highly c-axis oriented. The zero resistance temperature T c increases from 85 K to 90.5 K but drop with additional Y until 87 K. The highest critical current density obtained is 723.14 A/cm 2 at 70 K for 28% Y-doped sample under zero field.