Differential Vaporization During Laser Ablation Deposition of Bi-Sr-Ca-Cu-O Superconducting Materials

Publication Type	Journal Article

Authors	Wing-Tat Chan Xianglei Mao Richard E Russo
LBL Report Number	LBNL-31914
Abstract	Nanosecond and picosecond pulsed laser ablated materials from Bi-Sr-Ca-Cu-O superconducting targets are monitored by inductively coupled plasma-atomic emission spectrometry with a photodiode array detector. Differential vaporization was observed; elements of the lower-melting-point oxides (Bi₂O₃ and CuO) are enriched in the vapor phase, indicating a thermal vaporization mechanism. Melted droplets observed with SEM and enriched Ca and Sr content in the ablation crater measured with EDX support the hypothesis. A steady-state mass ablation composition after prolonged laser sampling is also observed; the ratios of intensity for Bi, Ca, and Sr to Cu are constant for power density 0.1 to 3.0 GW/cm²
Notes	LBNL-31914 NOT IN FILE
Journal	Applied Spectroscopy
Volume	46
Year of Publication	1992
Issue	6
Pagination	1025-1031
URL	http://www.opticsinfobase.org/as/abstract.cfm?URI=as-46-6-1025
Keywords	Deposition Target Emission Power Evaporation Material Thin films Ablation Laser Laser ablation Laser ablation Superconducting Vaporization Intensities Intensity High-tc Oxide Time Ca Composition Element Mass Sampling Spectrometry Constant Cu Ratio Vapor Crater Mechanism Icp-aes Elements Emission spectrometry Emission spectrometry Ratios Inductively coupled plasma atomic emission spectrometry Picosecond Ablated material Array Bi Bi-sr-ca-cu-o Cuo Density Droplet Droplets High-temperature superconductors Laser ablation deposition Laser sampling Nanosecond Oxides Phase Pulsed laser Pulsed laser Sem Sr Steady state Targets Thermal Thermal vaporization
Organizations	Laser Technologies Group Energy Technologies & Systems Division
Research Areas	No Research Area
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