TITLE

Quasipersistent change in Hall sensitivity after illumination

AUTHOR(S)
Schurig, E.; Besse, P.-A.; Manic, D.; Popovic, R. S.; Popovic, R.S.
PUB. DATE
November 2000
SOURCE
Applied Physics Letters;11/27/2000, Vol. 77 Issue 22
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A quasipersistent change in the magnetic sensitivity of nonplate-like Hall sensors after light exposure has been discovered. The recovery time constant is about 10 min. The observed effect is very similar to the persistent photoconductivity (PPC) which has been described some time ago in silicon bulk material. Surprisingly, the new effect is about 1 order of magnitude stronger than the PPC. The similar recovery behavior of both effects suggests a common origin in precipitated oxygen clusters in the active zone. The amplitude of the variations is highly dependent on the cluster concentration in the substrate. The presented Hall sensors give a sensitive means to characterize the oxygen-denuded zone in Czochralski wafers. © 2000 American Institute of Physics.
ACCESSION #
4415064

 

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