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

Arndt von Bieren | Zendy; Florian Brandl | Zendy; Dirk Grundler | Zendy; JeanPhilippe Ansermet | Zendy

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

Author(s) -

Arndt von Bieren,

Florian Brandl,

Dirk Grundler,

JeanPhilippe Ansermet

Publication year - 2013

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.4789974

Subject(s) - permalloy , nernst effect , materials science , nernst equation , thermoelectric effect , seebeck coefficient , thermocouple , magnetization , condensed matter physics , microstructure , thermal conductivity , magnetic field , chemistry , electrode , metallurgy , physics , thermodynamics , composite material , quantum mechanics

Thermoelectric effects in microstructured permalloy (Py)/Au wires are investigated using space- 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≈1.6 μV/K. ANE-based magnetic imaging of magnetic domains and magnetization reversal is demonstrated with a lateral resolution on the μm scale.

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