TY - JOUR
T1 - Superferromagnetic domain state of a discontinuous metal insulator multilayer
AU - Bedanta, S.
AU - Petracic, O.
AU - Kentzinger, E.
AU - Kleemann, W.
AU - Rücker, U.
AU - Paul, A.
AU - Brückel, Th
AU - Cardoso, S.
AU - Freitas, P. P.
N1 - Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2005/7/1
Y1 - 2005/7/1
N2 - Polarized neutron reflectivity (PNR) and magnetometry studies have been performed on the granular multilayer [Co80 Fe20 (1.3 nm)/Al2 O3 (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.
AB - Polarized neutron reflectivity (PNR) and magnetometry studies have been performed on the granular multilayer [Co80 Fe20 (1.3 nm)/Al2 O3 (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.
UR - http://www.scopus.com/inward/record.url?scp=33644932636&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.72.024419
DO - 10.1103/PhysRevB.72.024419
M3 - 文章
AN - SCOPUS:33644932636
VL - 72
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
SN - 1098-0121
IS - 2
M1 - 024419
ER -