Magnetic Properties of bcc-Fe(001)/C 60 Interfaces for Organic Spintronics

The magnetic structure of the interfaces between organic semiconductors and ferromagnetic contacts plays a key role in the spin injection and extraction processes in organic spintronic devices. We present a combined computational (density functional theory) and experimental (X-ray magnetic circular...

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Published inACS applied materials & interfaces Vol. 5; no. 3; pp. 837 - 841
Main Authors Tran, T. Lan Anh, Çakır, Deniz, Wong, P. K. Johnny, Preobrajenski, Alexei B., Brocks, Geert, van der Wiel, Wilfred G., de Jong, Michel P.
Format Journal Article
LanguageEnglish
Published 13.02.2013
Subjects
density functional theory
first-principles calculations
Fysik
metal-organic interfaces
Natural Sciences
Naturvetenskap
Physical Sciences
spintronics
X-ray absorption spectroscopy
X-ray magnetic circular dichroism
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Summary:The magnetic structure of the interfaces between organic semiconductors and ferromagnetic contacts plays a key role in the spin injection and extraction processes in organic spintronic devices. We present a combined computational (density functional theory) and experimental (X-ray magnetic circular dichroism) study on the magnetic properties of interfaces between bcc-Fe(001) and C-60 molecules. C-60 is an interesting candidate for application in organic spintronics due to the absence of hydrogen atoms and the associated hyperfine fields. Adsorption of C-60 on Fe(001) reduces the magnetic moments on the top Fe layers by similar to 6%, while inducing an antiparrallel magnetic moment of similar to-0.2 mu(B) on C-60. Adsorption of C-60 on a model ferromagnetic substrate consisting of three Fe monolayers on W(001) leads to a different structure but to very similar interface magnetic properties.
ISSN:1944-8244
1944-8252
DOI:10.1021/am3024367