Modulated magnetization depth profile in dipolarly coupled magnetic multilayers

TY - JOUR

T1 - Modulated magnetization depth profile in dipolarly coupled magnetic multilayers

AU - Bedanta, S.

AU - Kentzinger, E.

AU - Petracic, O.

AU - Kleemann, W.

AU - Rücker, U.

AU - Brückel, Th

AU - Paul, A.

AU - Cardoso, S.

AU - Freitas, P. P.

PY - 2006

Y1 - 2006

N2 - Polarized neutron reflectivity (PNR) and magnetometry studies have been performed on the metal-insulator multilayer [Co80 Fe20 (1.6 nm) Al2 O3 (3 nm)] 9 which exhibits dominant dipolar coupling between the ferromagnetic layers. Our PNR measurements at the coercive field reveal a novel and unexpected magnetization state of the sample, exhibiting an oscillating magnetization depth profile from CoFe layer to CoFe layer with a period of five bilayers along the multilayer stack. With the help of micromagnetic simulations we demonstrate that competition between long- and short-ranged dipolar interactions apparently gives rise to this unprecedented phenomenon.

AB - Polarized neutron reflectivity (PNR) and magnetometry studies have been performed on the metal-insulator multilayer [Co80 Fe20 (1.6 nm) Al2 O3 (3 nm)] 9 which exhibits dominant dipolar coupling between the ferromagnetic layers. Our PNR measurements at the coercive field reveal a novel and unexpected magnetization state of the sample, exhibiting an oscillating magnetization depth profile from CoFe layer to CoFe layer with a period of five bilayers along the multilayer stack. With the help of micromagnetic simulations we demonstrate that competition between long- and short-ranged dipolar interactions apparently gives rise to this unprecedented phenomenon.

UR - http://www.scopus.com/inward/record.url?scp=33748307663&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.74.054426

DO - 10.1103/PhysRevB.74.054426

M3 - 文章

AN - SCOPUS:33748307663

VL - 74

JO - Physical Review B

JF - Physical Review B

SN - 2469-9950

IS - 5

M1 - 054426

ER -