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

TitleDifferential Vaporization During Laser Ablation Deposition of Bi-Sr-Ca-Cu-O Superconducting Materials
Publication TypeJournal Article
Year of Publication1992
AuthorsChan, Wing-Tat, Xianglei Mao, and Richard E. Russo
Secondary TitleApplied Spectroscopy
Volume46
Pagination1025-1031
Publication Languageeng
Accession Number27
Keywordsablated material, ablation, array, bi, bi-sr-ca-cu-o, ca, composition, constant, crater, cu, cuo, density, deposition, droplet, droplets, element, elements, emission, emission spectrometry, emission-spectrometry, evaporation, high-tc, high-temperature superconductors, icp-aes, inductively coupled plasma atomic emission spectrometry, inductively coupled plasma-atomic emission spectrometry, intensities, intensity, laser, laser ablation, laser ablation deposition, laser sampling, laser-ablation, mass, material, mechanism, nanosecond, oxide, oxides, phase, picosecond, power, pulsed laser, pulsed-laser, ratio, ratios, sampling, sem, spectrometry, sr, steady state, superconducting, target, targets, thermal, thermal vaporization, thin-films, time, vapor, vaporization
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
LBNL Report NumberLBNL-31914
Citation Key14231