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Please use this identifier to cite or link to this item: http://hdl.handle.net/2262/55897

Title: Proximity influence of a ferromagnet on the magnetoresistance of Cr film across a nonmagnetic layer
Author: SHVETS, IGOR
MC EVOY, CIARAN
Sponsor: 
Name Grant Number
00/PI.1/C042

Author's Homepage: http://people.tcd.ie/ivchvets
http://people.tcd.ie/mcevoyci
Keywords: magnetoresistance
magnetite
Cr
nonmagnetic
insulating layer
direct magnetic coupling
Atomic, molecular and chemical physics
Issue Date: 2004
Publisher: Elsevier
Citation: McEvoy, C.; Jin, X. S.; Shvets, I. V., Proximity influence of a ferromagnet on the magnetoresistance of Cr film across a nonmagnetic layer, Journal of Magnetism and Magnetic Materials, 283, 2-3, 2004, 171-180
Series/Report no.: Journal of Magnetism and Magnetic Materials;
283;
2-3;
Abstract: (5 nm) Cr (100)/( x nm) MgO (100)/(30 nm) Fe3O4 (100) (1 < x < 6 nm), as well as (5 nm) Cr (100)/(5 nm) MgO (10 0) structures were grown on MgO (10 0) substrates using molecular beam epitaxy. The proximity influence of the Fe3O4 bottom layer on the in-plane transport and magnetotransport properties of the Cr layer was studied. A reversal of the magneto resistance (MR) sign in the Cr film was observed for MgO layer thickness less than or equal to 5 nm. The thickness of the MgO layer at which the proximity influence of the Fe3O4 on the MR of the Cr film is still observed is too large to be accounted for by an exchange interaction. Our results suggest that the magnetic structure in the Cr film adjoining a pinhole in the MgO layer is distorted due to the exchange coupling. Such areas in the Cr film are thought to contribute to the negative MR.
Description: PUBLISHED
URI: http://hdl.handle.net/2262/55897
Related links: http://dx.doi.org/10.1016/j.jmmm.2004.05.019
Appears in Collections:Physics (Scholarly Publications)

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