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Publications (3/3 displayed)
- 2009Effects of combined current injection and laser irradiation on Permalloymicrowire switchingcitations
- 2009Domain wall velocity measurement in permalloy nanowires with X-ray magnetic circular dichroism imaging and single shot Kerr microscopycitations
- 2008Direct imaging of current-induced domain wall motion in CoFeB structurescitations
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article
Effects of combined current injection and laser irradiation on Permalloymicrowire switching
Abstract
Combined field- and current-induced domain wall (DW) motion in Perm alloy microwires is studied using fast magneto-optical Kerr-microscopy. On increasing the current density, we find a decrease of Kerr signal contrast, corresponding to a reduction in the magnetization, which is attributed to Joule heating of the sample. Resistance measurements on samples with varying substrates confirm that the Curie temperature is reached when the magneto-optical contrast vanishes and reveal the importance of the heat flow into the substrate, By tuning the laser power, DWs can be pinned in the laser spot, which can thus act as a flexible pinning site for DW deviccs.