Variation of LaSrCuO film temperature during pulsed laser deposition on LaSrGaO substrate

Author

Buzea, C. ; Myoren, H. ; Wang, H.B. ; Nakajima, K. ; Yamashita, T.

Author_Institution

Res. Inst. of Electr. Commun., Tohoku Univ., Sendai, Japan

Volume

9

Issue

2

fYear

1999

fDate

6/1/1999 12:00:00 AM

Firstpage

2398

Lastpage

2401

Abstract

By using a conventional laser ablation system, LSCO thin films were deposited on LaSrGaO/sub 4/(100) substrates in an oxygen environment. During deposition the temperature of the film surface was measured with an infrared pyrometer. The measured temperature decreases following the exponential law of radiation absorption in a material. The experimental results indicate an increase of the deviation from the exponential law with decreasing oxygen pressure in the chamber. The conclusion of this experiment reveals the fact that either the refraction index of the deposited material may vary nonuniformly or the deposition velocity is not a constant during laser ablation.

Keywords

high-temperature superconductors; lanthanum compounds; pulsed laser deposition; refractive index; strontium compounds; superconducting thin films; (LaSr)/sub 2/CuO/sub 4/; LaSrGaO/sub 4/; LaSrGaO/sub 4/(100) substrate; exponential radiation absorption law; film surface temperature; nonconstant deposition velocity; oxygen environment; oxygen pressure dependence; pulsed laser deposition; refraction index nonuniform variation; Laser ablation; Laser sintering; Laser theory; Optical materials; Optical pulses; Pulsed laser deposition; Sputtering; Substrates; Superconductivity; Temperature measurement;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.784955

Filename

784955