Dipolar-exchange spin waves in thin bilayers
Rob den Teuling (TU Delft - QN/Blanter Group, Kavli institute of nanoscience Delft)
Ritesh Das (Kavli institute of nanoscience Delft, TU Delft - QN/Blanter Group)
Artem V. Bondarenko (National Academy of Sciences of Ukraine , Kavli institute of nanoscience Delft, TU Delft - QN/Blanter Group)
Elena V. Tartakovskaya (Kavli institute of nanoscience Delft, National Academy of Sciences of Ukraine , Adam Mickiewicz University)
Gerrit E.W. Bauer (Chinese Academy of Sciences, Tohoku University)
Yaroslav M. Blanter (TU Delft - QN/Blanter Group, Kavli institute of nanoscience Delft)
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Abstract
We investigate the dipolar-exchange spin wave spectrum in thin ferromagnetic bilayers with in-plane magnetization, incorporating interlayer exchange coupling and intra- and interlayer dipolar interactions. In the continuum approximation, we analyze the nonreciprocity of propagating magnetic stray fields emitted by spin waves as a function of the relative orientation of the layer magnetizations that are observable by magnetometry of synthetic antiferromagnets or weakly coupled type-A van der Waals antiferromagnetic bilayers as a function of an applied magnetic field.