Space- and time-resolved Seebeck and Nernst voltages in laser-heated permalloy/gold microstructures

Thermoelectric effects in microstructured permalloy (Py) / gold (Au) wires are investigated using spatially and time-resolved measurements based on scanning focused laser heating. Supported by numerical simulations of the temperature distribution, we identify two major contributions to the laser-induced signals: (i) the Seebeck effect due to thermocouples of Py/Au and (ii) the anomalous Nernst effect (ANE) in Py with a coefficient of NANE 0:5 V/K. ANE-based magnetic imaging of magnetic domains and magnetization reversal is demonstrated with a lateral resolution on the m-scale.


Published in:
Applied Physics Letters, 102, 5, 052408
Year:
2013
Publisher:
American Institute of Physics
ISSN:
0003-6951
Keywords:
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 Record created 2013-02-06, last modified 2018-03-18

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