Spin-wave interference in three-dimensional rolled-up ferromagnetic microtubes.
We have investigated spin-wave excitations in rolled-up Permalloy microtubes using microwave absorption spectroscopy. We find a series of quantized azimuthal modes which arise from the constructive interference of Damon-Eshbach-type spin waves propagating around the circumference of the microtubes, forming a spin-wave resonator. The mode spectrum can be tailored by the tube's radius and number of rolled-up layers.
Balhorn
Felix
F
Institut für Angewandte Physik und Zentrum für Mikrostrukturforschung, Universität Hamburg, Jungiusstrasse 11, D-20355 Hamburg, Germany.
Mansfeld
Sebastian
S
Krohn
Andreas
A
Topp
Jesco
J
Hansen
Wolfgang
W
Heitmann
Detlef
D
Mendach
Stefan
S