Chirality switching and ultra-fast vortex domain wall motion in magnetic nanotubes
https://dipc.ehu.eus/en/scientific-activities/joint-seminar-agenda/cic-nanogune/seminar244
https://dipc.ehu.eus/@@site-logo/dipc-logo.png
Chirality switching and ultra-fast vortex domain wall motion in magnetic nanotubes
CIC nanoGUNE Seminars
- Speaker
-
Pedro Landeros, Valparaiso, Chile
- When
-
2012/01/23
12:00
- Place
- nanoGUNE seminar room, Tolosa Hiribidea 76, Donostia - San Sebastian
- Add to calendar
-
iCal
Subscribe to Newsletter

We study the effects of an electric current and magnetic field pulses on the
domain wall motion of a magnetic nanotube. We show that proper interplay
between the spin torque and the Oersted field from the current flowing along
the tube, can be used to manipulate the position, velocity and chirality of a
vortex domain wall. Also, by applying magnetic field pulses. It is found that
the chiral state of the vortex wall can be switched provided that (i) the
field amplitude is between two critical values, the so-called chiral field and
the well-known Walker field, and (ii) the pulse duration is longer than a
critical time, which is the time that the wall needs in order to overcome a
local energy barrier. Moreover, the classical Oersted field, which more than
frequently is ignored over spin-transfer effects, suppresses the precessional
motion, leading to domain wall propagation at ultra-fast velocities, of the
order of several thousands meters per second for experimentally accessible
electric currents.