Journal Article

PreJuSER-46320

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Superferromagnetic domain state of a discontinuous metal insulator multilayer

Bedanta, S. ; Petracic, O. ; Kentzinger, E.FZJ* ; Kleemann, W. ; Rücker, U.FZJ* ; Paul, A.FZJ* ; Brückel, T.FZJ* ; Cardoso, S. ; Freitas, P. P.

2005
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/1172  doi:10.1103/PhysRevB.72.024419

Abstract: Polarized neutron reflectivity (PNR) and magnetometry studies have been performed on the granular multilayer [Co80Fe20(1.3 nm)/Al2O3(3 nm)](10). Due to strong interparticle interactions, a collective superferromagnetic state is encountered. Cole-Cole plots drawn from the complex ac susceptibility are measured as functions of frequency, temperature, and field amplitudes that hint at the relaxation, creep, sliding, and switching regimes of pinned domain walls that are in close agreement with results obtained from simulations. Very slow switching with exponential relaxation under near-coercive fields is confirmed by PNR measurements. The complete absence of spin-flip scattering confirms that the magnetization reversal is achieved merely by domain nucleation and growth.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Streumethoden (IFF-ISM)

Research Program(s):

1. Betrieb und Weiterentwicklung der Neutronenquelle FRJ- 2 (M05)

Appears in the scientific report 2005
Notes: This version is available at the following Publisher URL: http://prb.aps.org

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