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Spin injection into a two-dimensional electron gas using inter-digital-ferromagnetic contacts

✍ Scribed by C.M. Hu; J. Nitta; A. Jensen; J.B. Hansen; H. Takayanagi; T. Matsuyama; D. Grundler; G. Meier; D. Heitmann; U. Merkt

Publisher: Elsevier Science
Year: 2002
Tongue: English
Weight: 135 KB
Volume: 12
Category: Article
ISSN: 1386-9477
DOI: 10.1016/s1386-9477(01)00293-4

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✦ Synopsis

We present a model that describes the spin injection across a single interface with two electrodes. The spin-injection rate across a typical hybrid junction made of ferromagnet (FM) and a two-dimensional electron gas (2DEG) is found at the percentage level. We perform spin-injection-detection experiment on devices with two ferromagnetic contacts on a 2DEG conÿned in an InAs quantum well. A spin-injection rate of 4.5% is estimated from the measured magnetoresistance.

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