Effect of partial melting and annealing on orientation, surface morphology and transport properties of Bi₂Sr₂CaCu₂O_8+δ thin films fabricated via 1064 nm Nd:YAG pulsed laser ablation

Authors

Jeffrey C. de Vero ⋅ PH National Institute of Physics, University of the Philippines Diliman
Jacque Lynn F. Gabayno ⋅ PH National Institute of Physics, University of the Philippines Diliman
Jaziel R. Vitug ⋅ PH National Institute of Physics, University of the Philippines Diliman
Wilson O. Garcia ⋅ PH National Institute of Physics, University of the Philippines Diliman
Roland V. Sarmago ⋅ PH National Institute of Physics, University of the Philippines Diliman

Abstract

We investigated the effect of partial melting and annealing on orientation, surface morphology and transport properties of Bi₂Sr₂CaCu₂O_8+δ (Bi-2212) films grown on single-crystalline (001) MgO substrates by pulsed laser ablation. The target was irradiated with a Q-switched 1064 nm pulsed Nd:YAG laser with repetition rate of 10 Hz, maximum energy of 1.4 J per pulsed and a nominal pulse duration (full width at half maximum) of 8 ns under a 10-2 mbar vacuum pressure and a single crystal MgO substrate (001) was used in the deposition. Island growth mechanisms were found to be dominant in the as-deposited films where as films that are partially melted with subsequent annealing shows strong two dimensional-layered structure. Partial melting at 880°C after 10 hours of annealing produced highly c-axis oriented films with smoother surface and more homogenous composition. Annealing without partial melting increases the onset of superconducting transition temperature, Tc , but sharpness of the transition is lost. Resistivity measurements showed transition widths for the best films are 5K and 19K.

Downloads

Issue

2008: Proceedings of the 26th Samahang Pisika ng Pilipinas Physics Congress

Article ID

SPP-2008-4A-02

Section

Materials Physics

Published

2008-10-22

How to Cite

[1]

JC de Vero, JLF Gabayno, JR Vitug, WO Garcia, and RV Sarmago, Effect of partial melting and annealing on orientation, surface morphology and transport properties of Bi2Sr2CaCu2O8+δ thin films fabricated via 1064 nm Nd:YAG pulsed laser ablation, Proceedings of the Samahang Pisika ng Pilipinas 26, SPP-2008-4A-02 (2008). URL: https://proceedings.spp-online.org/article/view/SPP-2008-4A-02.