TY - JOUR
T1 - Field-dependent magnetic domain structure in antiferromagnetically coupled multilayers by polarized neutron scattering
AU - Paul, Amitesh
AU - Kentzinger, Emmanuel
AU - Rücker, Ulrich
AU - Bürgler, Daniel E.
AU - Brückel, Thomas
N1 - Copyright:
Copyright 2012 Elsevier B.V., All rights reserved.
PY - 2006
Y1 - 2006
N2 - We study the magnetic structure of antiferromagnetically (AF) coupled Co Cu multilayers (MLs) with 10 or 40 bilayers under the influence of an external field by polarized neutron scattering in specular and off-specular geometry. We observe in the spin-flip channels off-specular intensities around the 1 2 -order Bragg position. Based on simulations of the measured data within the distorted-wave Born approximation we find vertically correlated domains, and their domain size evolves for a sufficiently large number of bilayers along the ML stack. Small domains most likely at the top and large domains presumably at the bottom coexist within a single ML. The small domains gradually get aligned with the applied field direction around 0.5 kOe, whereas the bigger domains remain AF coupled up to 3.0 kOe, which is well above the apparent saturation field measured by conventional magnetometry methods. Moreover, we observe a double-peak structure at the 1 2 -order position for the MLs with ten as well as 40 bilayers.
AB - We study the magnetic structure of antiferromagnetically (AF) coupled Co Cu multilayers (MLs) with 10 or 40 bilayers under the influence of an external field by polarized neutron scattering in specular and off-specular geometry. We observe in the spin-flip channels off-specular intensities around the 1 2 -order Bragg position. Based on simulations of the measured data within the distorted-wave Born approximation we find vertically correlated domains, and their domain size evolves for a sufficiently large number of bilayers along the ML stack. Small domains most likely at the top and large domains presumably at the bottom coexist within a single ML. The small domains gradually get aligned with the applied field direction around 0.5 kOe, whereas the bigger domains remain AF coupled up to 3.0 kOe, which is well above the apparent saturation field measured by conventional magnetometry methods. Moreover, we observe a double-peak structure at the 1 2 -order position for the MLs with ten as well as 40 bilayers.
UR - http://www.scopus.com/inward/record.url?scp=33645373298&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.73.094441
DO - 10.1103/PhysRevB.73.094441
M3 - 文章
AN - SCOPUS:33645373298
VL - 73
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
SN - 1098-0121
IS - 9
M1 - 094441
ER -