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Luminescent spin-valve transistor Ian Appelbaum,a)

Summary: Luminescent spin-valve transistor
Ian Appelbaum,a)
K. J. Russell, D. J. Monsma, V. Narayanamurti, and C. M. Marcus
Gordon McKay Laboratory, Harvard University, Cambridge, Massachusetts 02138
M. P. Hanson and A. C. Gossard
Materials Department, University of California, Santa Barbara, California 93106
Received 29 July 2003; accepted 7 October 2003
A magneto-optical sensor, the luminescent spin-valve transistor, is demonstrated, showing direct
control of a light source using a magnetic field. By manipulating the relative magnetizations of
thin-film ferromagnets in the transistor's base, the luminescence intensity is modulated by
approximately 200%. 2003 American Institute of Physics. DOI: 10.1063/1.1630838
Since its discovery in 1988,13
magnetic-field sensors
based on the giant magnetoresistance GMR of magnetic
multilayers have been the subject of much research that has
led to important technologies.46
One such sensor, the spin-
valve transistor SVT , modulates a hot-electron current
passing perpendicularly through the multilayers.79
The rela-


Source: Appelbaum, Ian - Department of Physics, University of Maryland at College Park


Collections: Engineering; Materials Science