TITLE

Magnetoresistance effect and interlayer coupling of (Ga, Mn)As trilayer structures

AUTHOR(S)
Chiba, D.; Akiba, N.; Matsukura, F.; Ohno, Y.; Ohno, H.
PUB. DATE
September 2000
SOURCE
Applied Physics Letters;9/18/2000, Vol. 77 Issue 12
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We have investigated the magnetic and magnetotransport properties of (Ga, Mn)As/(Al, Ga)As/(Ga, Mn)As semiconductor-based magnetic trilayer structures. We observe a weak ferromagnetic interlayer coupling between the two ferromagnetic (Ga, Mn)As layers as well as magnetoresistance effects due to spin-dependent scattering and to spin-dependent tunneling. Both the coupling strength and the magnetoresistance ratio decrease with the increase of temperature and/or the increase of Al composition of the nonmagnetic (Al, Ga)As layer. © 2000 American Institute of Physics.
ACCESSION #
4414270

 

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