Journal
APPLIED PHYSICS LETTERS
Volume 79, Issue 19, Pages 3104-3106Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1413716
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The bias and temperature dependent resistance and magnetoresistance of magnetic tunnel junctions with and without intentional shorts through the insulating barrier were studied. Based on the experimental results, a set of quality criteria was formulated that enables the identification of barrier shorts. While the temperature and bias dependencies of the junction resistance and of the fitted barrier parameters are very sensitive to the presence of such shorts, the same dependencies of the magnetoresistance are surprisingly insensitive. Finally, junctions with a shorted barrier exhibit a dramatic increase in noise level and junction instability. (C) 2001 American Institute of Physics.
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