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Spin valve magnetization reversal obtained by N-doping in Fe/insulator/Fe trilayers

Georgieva, MT, Telling, ND, Jones, GA, Grundy, PJ, Hase, TPA and Tanner, BK 2003, 'Spin valve magnetization reversal obtained by N-doping in Fe/insulator/Fe trilayers' , Journal of Physics: Condensed Matter, 15 (4) , pp. 617-624.

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Abstract

The effect of N-doping on the microstructure and coercivity of the ‘free’ Fe layer in Fe/insulator/Fe trilayers has been examined. Itwas found thatN-doping leads to a magnetic softening of the Fe layer and a corresponding reduction in the grain size. Hard/soft spin-valve trilayers, showing good independent layer reversal, were obtained using N-doped and undoped Fe layers. Ferromagnetic interlayer coupling was found in these trilayers that could be well described by a N´eel coupling mechanism. Nonuniform reversal of the harder Fe layer, once incorporated in the trilayer, was also observed and could be reproduced using a simple model in which local variations in the interlayer coupling energy are considered. Such variations are likely to be caused by structural inhomogeneity in the films. N-doping is potentially important as a method for tailoring the coercivity of the ‘free’ layer in spin-valves comprising high-polarization magnetic materials.

Item Type: Article
Themes: Subjects / Themes > Q Science > QC Physics
Subjects outside of the University Themes
Schools: Colleges and Schools > College of Science & Technology
Colleges and Schools > College of Science & Technology > School of Computing, Science and Engineering
Colleges and Schools > College of Science & Technology > School of Computing, Science and Engineering > Materials & Physics Research Centre
Journal or Publication Title: Journal of Physics: Condensed Matter
Publisher: Institute of Physics
Refereed: Yes
ISSN: 09538984
Depositing User: H Kenna
Date Deposited: 05 Sep 2007 11:23
Last Modified: 20 Aug 2013 16:47
URI: http://usir.salford.ac.uk/id/eprint/391

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