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Electron Beam Induced Oxygen Disordering in Yba2cu307-X Superconductors

Published online by Cambridge University Press:  25 February 2011

S. N. Basu ,
T. Roy ,
T. E. Mitchell  and
M. Nastasi
S. N. Basu
Affiliation:
Los Alamos National Laboratory, Los Alamos, NM 87545.
T. Roy
Affiliation:
Los Alamos National Laboratory, Los Alamos, NM 87545.
T. E. Mitchell
Affiliation:
Los Alamos National Laboratory, Los Alamos, NM 87545.
M. Nastasi
Affiliation:
Los Alamos National Laboratory, Los Alamos, NM 87545.
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Abstract

Thin foils of bulk YBa2Cu3O7–x (YBCO) superconductors were subjected to electron irradiation in a Transmission Electron Microscope (TEM). The resulting disordering of the oxygen atoms and vacancies in the Cu-0 planes was monitored by measuring the splitting of the (110) diffraction spots in the [001] diffraction pattern. Samples were irradiated at 83K with 100, 150, 200 and 300kV electrons. The 100kV electrons did not cause any disordering, even after prolonged irradiation. The results of the higher energy irradiations showed an excellent fit to a disordering model, indicating a lack of radiation assisted reordering at 83K. This was further confirmed by the insensitivity of the disordering to the dose rate of 300kV electrons at 83K. However, at 300K, an increase in the dose rate of 300kV electrons increased the disordering rate, indicating that radiation assisted reordering was occuring at that temperature.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 157: Symposium A – Beam-Solid Interactions: Physical Phenomena , 1989 , 581
Copyright
Copyright © Materials Research Society 1990

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References

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