ISSN:
1432-0630
Keywords:
74.70Vy
;
61.16Fk
;
79.70+g
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Abstract Atomic-resolution images from superconducting and nonsuperconducting samples of YBa2Cu3O7−x have been obtained by field ion microscopy. Both phases of the material exhibit a similar layered structure in the field ion images. Transmission electron micrographs of superconducting field ion tips show vividly the twinned structure of the orthorhombic phase. Time-of-flight (atom-probe) mass spectra from the two materials differ primarily in an enhanced molecular oxygen signal from the superconducting samples indicating that oxygen in the O(4) sites (CuO chains) is field desorbed preferentially as molecular oxygen ions.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00619385
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