Speaker
Benedikt Boehm
(IBM Research - Zurich, 8803 Rüschlikon, Switzerland)
Description
Perpendicularly magnetized nanowires exhibit distinct domain wall types depending on the geometry. Wide wires contain Bloch walls, narrow wires Néel walls. Here, the transition region is investigated by direct imaging of the wall structure using high-resolution spin-polarized scanning electron microscopy. An achiral wall type is discovered whose in-plane magnetic moment angle is intermediate between the one of Bloch and Néel walls which is unpredicted by established theoretical models. With the help of micromagnetic simulations, we find that the transition via this intermediate wall should occur in any perpendicularly magnetized material provided the wire width is chosen accordingly.
Authors
Benedikt Boehm
(IBM Research - Zurich, 8803 Rüschlikon, Switzerland)
A. Bisig
(IBM Research - Zurich, 8803 Rüschlikon, Switzerland)
A. Bischof
(IBM Research - Zurich, 8803 Rüschlikon, Switzerland)
G. Stefanou
(School of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, United Kingdom)
B. J. Hickey
(School of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, United Kingdom)
R. Allenspach
(IBM Research - Zurich, 8803 Rüschlikon, Switzerland)
