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UV Tunable Laser Ablation of YBa2Cu3Ox+6: Changes in the Product Population and Kinetic Energy Distributions as a Function of the Laser Wavelength and Target Bulk Temperature

Published online by Cambridge University Press:  16 February 2011

L. Wiedeman  and
H. Helvajian
L. Wiedeman
Affiliation:
Laser Chemistry & Spectroscopy Department, The Aerospace Corporation, P. O. Box 92957, Los Angeles, California 90009.
H. Helvajian*
Affiliation:
Laser Chemistry & Spectroscopy Department, The Aerospace Corporation, P. O. Box 92957, Los Angeles, California 90009.
*
*Person to whom correspondence should be addressed. Project funded by the Aerospace Sponsored Research Program.
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Abstract

We have conducted two separate experiments in the UV laser ablation of a sintered Yba2Cu3Ox+6wafer. We have measured the photoejected population distributions using selected UV laser wavelengths (4.01, 4.17 and 4.35 eV) near the 4.1 eV optical transition in Yba2Cu3Ox+6 In addition, we have measured the change in the ejected species kinetic energy as a function of the target bulk temperature. All the experiments were conducted at laser fluences well below the plasma formation threshold, and near that for product formation. Our results show that the UV laser ablation, at threshold fluences, proceeds via a nonthermal electronic excitation mechanism.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 191: Symposium N – Laser Ablation for Materials Synthesis , 1990 , 199
Copyright
Copyright © Materials Research Society 1990

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References

REFERENCES

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