TITLE

Effects of combined current injection and laser irradiation on Permalloy microwire switching

AUTHOR(S)
Franken, J. H.; Möhrke, P.; Kläui, M.; Rhensius, J.; Heyderman, L. J.; Thiele, J.-U.; Swagten, H. J. M.; Gibson, U. J.; Rüdiger, U.
PUB. DATE
November 2009
SOURCE
Applied Physics Letters;11/23/2009, Vol. 95 Issue 21, p212502
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Combined field- and current-induced domain wall (DW) motion in Permalloy 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 devices.
ACCESSION #
45478114

 

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