Time-resolved imaging of current-induced domain-wall oscillations
Journal Article
·
· Phys Rev B Rapid Comm
Current-induced domain-wall dynamics is investigated via high-resolution soft x-ray transmission microscopy by a stroboscopic pump-and-probe measurement scheme at a temporal resolution of 200 ps. A 180{sup o} domain wall in a restoring potential of a permalloy microstructure is displaced from its equilibrium position by nanosecond current pulses leading to oscillations with velocities up to 325 m/s. The motion of the wall is described with an analytical model of a rigid domain wall in a nonharmonic potential allowing one to determine the mass of the domain wall. We show that Oersted fields dominate the domain-wall dynamics in our geometry.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- Materials Sciences Division
- DOE Contract Number:
- DE-AC02-05CH11231
- OSTI ID:
- 942139
- Report Number(s):
- LBNL-1166E; PRBOFW; TRN: US200915%%451
- Journal Information:
- Phys Rev B Rapid Comm, Journal Name: Phys Rev B Rapid Comm; ISSN 1089-4896
- Country of Publication:
- United States
- Language:
- English
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