High-field magnetoresistance of Fe/GaAs/Fe tunnel junctions

DOI to cite this document:: 10.5283/epub.11825

Zenger, Marcus ; Moser, Jürgen ; Wegscheider, Werner ; Weiss, Dieter

; Dietl, T.

PDF
(356kB) - Repository staff only

Date of publication of this fulltext: 11 Jan 2010 13:21

Alternative links to fulltext:DOI

Details

Indexed in

Export bibliographical data

Abstract

We investigate transport through 6-10 nm thin epitaxial GaAs(001) barriers sandwiched between polycrystalline iron films. Apart from a pronounced tunneling magnetoresistance effect at low magnetic fields, we observe a distinct negative magnetoresistance (MR) at low and a positive MR at higher temperatures. We show that the negative MR contribution is only observed for the ferromagnetic iron ...