Journal
PHYSICAL REVIEW LETTERS
Volume 101, Issue 25, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.101.256602
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Funding
- Deutsche Forschungsgemeinschaft [SFB 513]
- Landesstiftung Baden Wurttemberg
- European Union
- SPINSWITCH [MRTN-CT2006-035327]
- Samsung Advanced Institute of Technology
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Using microwave currents, we excite resonances of geometrically confined pinned domain walls, detecting the resonance by the rectification of the microwave current. By applying magnetic fields, the resonance frequency of the domain wall oscillator can be tuned over a wide range. Increasing the power leads to a redshift due to the nonlinearity of the system. From this frequency shift, we directly deduce the quantitative shape of the potential, so that a complete characterization of the pinning potential is obtained.
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