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

Publication Type

Journal Article

Authors

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

Journal

Applied Spectroscopy

Volume

46

Year of Publication

1992

URL

Issue

6

Notes

LBNL-31914 NOT IN FILE

Organization