TY - JOUR
T1 - Substrate-stress-induced magnetic and nonmagnetic structural correlations in Fe/Si multilayers
AU - Paul, Amitesh
AU - Teichert, Anke
AU - Krist, Thomas
AU - Steitz, Roland
N1 - Publisher Copyright:
© 2015 International Union of Crystallography.
PY - 2015/8/1
Y1 - 2015/8/1
N2 - Application of a bias voltage can influence the growth kinetics and thereby the stress in a magnetic multilayer. The inherent structural correlations in turn can influence the magnetic domain structures and thereby the overall device performance. Here, prototypical Fe/Si supermirrors are subjected to stress relaxation during the growth of sequential layers by applying a sufficient substrate bias voltage. A change in the coercivity associated with the grain size variation upon biasing is found. Most interestingly, using polarized neutron scattering, it is possible to identify that the conformal roughness becomes nonconformal with the relaxation of stress within the multilayers. The magnetic domains, on the other hand, always remain nonconformal (independent of the structural change) as they undergo spatial fluctuations around a mean magnetization. This study underscores the importance of the substrate biasing in affecting the structural correlation, which is detrimental to the resultant optical (e.g. supermirror) quality.
AB - Application of a bias voltage can influence the growth kinetics and thereby the stress in a magnetic multilayer. The inherent structural correlations in turn can influence the magnetic domain structures and thereby the overall device performance. Here, prototypical Fe/Si supermirrors are subjected to stress relaxation during the growth of sequential layers by applying a sufficient substrate bias voltage. A change in the coercivity associated with the grain size variation upon biasing is found. Most interestingly, using polarized neutron scattering, it is possible to identify that the conformal roughness becomes nonconformal with the relaxation of stress within the multilayers. The magnetic domains, on the other hand, always remain nonconformal (independent of the structural change) as they undergo spatial fluctuations around a mean magnetization. This study underscores the importance of the substrate biasing in affecting the structural correlation, which is detrimental to the resultant optical (e.g. supermirror) quality.
KW - Fe/Si supermirrors
KW - magnetic multilayers
KW - stress
KW - structural correlations
UR - http://www.scopus.com/inward/record.url?scp=84938413522&partnerID=8YFLogxK
U2 - 10.1107/S1600576715009942
DO - 10.1107/S1600576715009942
M3 - 文章
AN - SCOPUS:84938413522
SN - 0021-8898
VL - 48
SP - 1023
EP - 1033
JO - Journal of Applied Crystallography
JF - Journal of Applied Crystallography
ER -