Journal article
Effect of Ru Impurities on Magnetoresistance in Co/Ru/Co(Ru) Sandwiches
MRS proceedings, Vol.475, pp.481-486
1997
DOI: 10.1557/PROC-475-481
Abstract
Magnetoresistance (MR) measurements have been performed on two series of Co(3.2 nm)/Ru(x=0.5 to 3 nm)/Co(3.2 nm) and Co(3.2 nm)/Ru(x)/Co.92Ru.08 (3.2 nm) sandwiches prepared by ultra high vacuum evaporation onto mica substrates. At 300 K, all samples of the first series present giant magnetoresistance (GMR) whereas the samples of the second series, and with the same Ru spacer thickness, show an inverse GMR. This inverse GMR is induced by alloying the second Co layer with 8 at% Ru and can be attributed to the change of the scattering coefficients ratio (α) between the two magnetic layers. Indeed, for the first Co layer the scattering coefficient ratio α1=ρ↓/ρ↑>1. However, for the second magnetic layer, alloying Co and Ru may induce an increase of the density of states at the Fermi level for majority spin electrons and as a consequence 0C2 = α2=ρ↓/ρ↑<1
Details
- Title: Subtitle
- Effect of Ru Impurities on Magnetoresistance in Co/Ru/Co(Ru) Sandwiches
- Creators
- A Dinia - IPCMS-GEMM UMR 46 CNRS-ULP, 23 rue du Loess 67037 Strasbourg, FranceK Rahmouni - IPCMS-GEMM UMR 46 CNRS-ULP, 23 rue du Loess 67037 Strasbourg, FranceN Persat - IPCMS-GEMM UMR 46 CNRS-ULP, 23 rue du Loess 67037 Strasbourg, FranceD Stoeffler - IPCMS-GEMM UMR 46 CNRS-ULP, 23 rue du Loess 67037 Strasbourg, FranceK Ounadjela - IPCMS-GEMM UMR 46 CNRS-ULP, 23 rue du Loess 67037 Strasbourg, FranceH.A.M van den Berg - Siemens AG, ZT MF 1, Postfach 3220, D-91050 Erlangen, Germany
- Contributors
- W.J.M de Jonge (Editor)K Barmak (Editor)D.D Chambliss (Editor)P Dederichs (Editor)T Katayama (Editor)
- Resource Type
- Journal article
- Publication Details
- MRS proceedings, Vol.475, pp.481-486
- DOI
- 10.1557/PROC-475-481
- ISSN
- 0272-9172
- eISSN
- 1946-4274
- Publisher
- Cambridge University Press; New York, USA
- Number of pages
- 6
- Language
- English
- Date published
- 1997
- Academic Unit
- Iowa Neuroscience Institute; Fraternal Order of Eagles Diabetes Research Center; Neuroscience and Pharmacology; Internal Medicine
- Record Identifier
- 9984070887202771
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