Journal Article

PreJuSER-467

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Magnetism of Nanowires Driven by Novel Even-Odd Effects

Lounis, S.FZJ* ; Dederichs, P. H.FZJ* ; Blügel, S.FZJ*

2008
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/7175  doi:10.1103/PhysRevLett.101.107204

Abstract: The parity of the number of atoms in finite antiferromagnetic nanowires deposited on ferromagnets is shown to be a crucial quantity determining their magnetic ground state. Relating results of the full-potential Korringa-Kohn-Rostoker method for noncollinear magnetism from first principles to a Heisenberg model, we show that the magnetic structure changes dramatically across the entire nanowire if one single atom is added to it. Infinite and finite even-numbered nanochains exhibit always noncollinear magnetism, while odd-numbered wires lead under given conditions to a collinear ferrimagnetic ground state. This extremely nonlocal effect occurs only for nanosized wires.

Keyword(s): J

Note: We thank Dr. Mavropoulos for fruitful discussions. This work was supported by the ESF EUROCORES Programme SONS under Contract No. ERAS-CT-2003-980409 and the DFG Priority Programme SPP1153.

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Contributing Institute(s):

1. Theorie der Strukturbildung (IFF-3)
2. Quanten-Theorie der Materialien (IFF-1)
3. Jülich-Aachen Research Alliance - Fundamentals of Future Information Technology (JARA-FIT)
4. Jülich-Aachen Research Alliance - Simulation Sciences (JARA-SIM)

Research Program(s):

1. Kondensierte Materie (P54)

Appears in the scientific report 2008

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