DIFFERENTIAL VAPORIZATION DURING LASER ABLATION DEPOSITION OF BI-SR-CA-CU-O SUPERCONDUCTING MATERIALS

被引：37
作者：
CHAN, WT [1 ]
MAO, XL [1 ]
RUSSO, RE [1 ]
机构：
[1] LAWRENCE BERKELEY LAB,M-S 90-2024,BERKELEY,CA 94720
来源：
APPLIED SPECTROSCOPY | 1992年 / 46卷 / 06期
关键词：
LASER ABLATION; THERMAL VAPORIZATION; ICP-AES; HIGH-TEMPERATURE SUPERCONDUCTORS;
D O I：
10.1366/0003702924124510
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
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.
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收藏
页码：1025 / 1031
页数：7
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