Journal
PHYSICAL REVIEW LETTERS
Volume 104, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.104.067201
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Funding
- German Science Foundation (DFG) [SFB 767, KL 1811]
- ERC (Starting Independent Researcher) [ERC 2007-Stg 208162]
- EU (RTN Spinswitch) [MRTN CT-2006-035327]
- Samsung Advanced Institute of Technology
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Using photoemission electron microscopy, we image the dynamics of a field pulse excited domain wall in a Permalloy nanowire. We find a delay in the onset of the wall motion with respect to the excitation and an oscillatory relaxation of the domain wall back to its equilibrium position, defined by an external magnetic field. The origin of both of these inertia effects is the transfer of energy between energy reservoirs. By imaging the distribution of the exchange energy in the wall spin structure, we determine these reservoirs, which are the basis of the domain wall mass concept.
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