Observation of giant magnetoresistance due to open orbits in hybrid semiconductor/ferromagnet devices

Alain Nogaret, S Carlton, B Gallagher, pc main, M Henini, R Wirtz, R Newbury, MA Howson, sp beaumont

Research output: Contribution to journalArticle

85 Citations (Scopus)

Abstract

We have investigated the magnetoresistance of a heterostructure containing a near surface two-dimensional electron gas subject to a periodic magnetic field that alternates in sign. The field is produced by an array of submicrometer ferromagnets fabricated on the surface of the heterostructure. We observe a giant low-field magnetoresistance due to electrons propagating in open orbits along lines of zero magnetic field. We are able to account for the observed form and magnitude of this magnetoresistance in a semiclassical model.
Original languageEnglish
Pages (from-to)16037-16040
Number of pages4
JournalPhysical Review B : Condensed Matter and Materials Physics
Volume55
DOIs
Publication statusPublished - 15 Jun 1997

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