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 National Institute of Physics, University of the Philippines Diliman
Jacque Lynn F. Gabayno National Institute of Physics, University of the Philippines Diliman
Jaziel R. Vitug National Institute of Physics, University of the Philippines Diliman
Wilson O. Garcia National Institute of Physics, University of the Philippines Diliman
Roland V. Sarmago 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.

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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.