Influence of heat flow directions on Nernst effects in Py/Pt bilayers

We investigated the voltages obtained in a thin Pt strip on a Permalloy film which was subject to in-plane temperature gradients and magnetic fields. The voltages detected by thin W-tips or bond wires showed a purely symmetric effect with respect to the external magnetic field which can be fully exp...

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Published inarXiv.org
Main Authors Meier, Daniel, Reinhardt, Daniel, Schmid, Maximilian, Back, Christian H, Jan-Michael Schmalhorst, Kuschel, Timo, Reiss, Günter
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 08.11.2013
Subjects
Dependence
Ferrous alloys
Heat transmission
Magnetic alloys
Magnetic fields
Nernst-Ettingshausen effect
Physics - Materials Science
Seebeck effect
Temperature gradients
Tips
Online AccessGet full text
ISSN2331-8422
DOI10.48550/arxiv.1309.6237

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Abstract We investigated the voltages obtained in a thin Pt strip on a Permalloy film which was subject to in-plane temperature gradients and magnetic fields. The voltages detected by thin W-tips or bond wires showed a purely symmetric effect with respect to the external magnetic field which can be fully explained by the planar Nernst effect (PNE). To verify the influence of the contacts measurements in vacuum and atmosphere were compared and gave similar results. We explain that a slightly in-plane tilted temperature gradient only shifts the field direction dependence but does not cancel out the observed effects. Additionally, the anomalous Nernst effect (ANE) could be induced by using thick Au-tips which generated a heat current perpendicular to the sample plane. The effect can be manipulated by varying the temperature of the Au-tips. These measurements are discussed concerning their relevance in transverse spin Seebeck effect measurements.
AbstractList We investigated the voltages obtained in a thin Pt strip on a Permalloy film which was subject to in-plane temperature gradients and magnetic fields. The voltages detected by thin W-tips or bond wires showed a purely symmetric effect with respect to the external magnetic field which can be fully explained by the planar Nernst effect (PNE). To verify the influence of the contacts measurements in vacuum and atmosphere were compared and gave similar results. We explain that a slightly in-plane tilted temperature gradient only shifts the field direction dependence but does not cancel out the observed effects. Additionally, the anomalous Nernst effect (ANE) could be induced by using thick Au-tips which generated a heat current perpendicular to the sample plane. The effect can be manipulated by varying the temperature of the Au-tips. These measurements are discussed concerning their relevance in transverse spin Seebeck effect measurements.
Phys. Rev. B 88, 184425 (2013) We investigated the voltages obtained in a thin Pt strip on a Permalloy film which was subject to in-plane temperature gradients and magnetic fields. The voltages detected by thin W-tips or bond wires showed a purely symmetric effect with respect to the external magnetic field which can be fully explained by the planar Nernst effect (PNE). To verify the influence of the contacts measurements in vacuum and atmosphere were compared and gave similar results. We explain that a slightly in-plane tilted temperature gradient only shifts the field direction dependence but does not cancel out the observed effects. Additionally, the anomalous Nernst effect (ANE) could be induced by using thick Au-tips which generated a heat current perpendicular to the sample plane. The effect can be manipulated by varying the temperature of the Au-tips. These measurements are discussed concerning their relevance in transverse spin Seebeck effect measurements.
Author Reinhardt, Daniel
Schmid, Maximilian
Back, Christian H
Jan-Michael Schmalhorst
Kuschel, Timo
Meier, Daniel
Reiss, Günter
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BackLink https://doi.org/10.48550/arXiv.1309.6237$$DView paper in arXiv
https://doi.org/10.1103/PhysRevB.88.184425$$DView published paper (Access to full text may be restricted)
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Snippet We investigated the voltages obtained in a thin Pt strip on a Permalloy film which was subject to in-plane temperature gradients and magnetic fields. The...
Phys. Rev. B 88, 184425 (2013) We investigated the voltages obtained in a thin Pt strip on a Permalloy film which was subject to in-plane temperature gradients...
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SubjectTerms Dependence
Ferrous alloys
Heat transmission
Magnetic alloys
Magnetic fields
Nernst-Ettingshausen effect
Physics - Materials Science
Seebeck effect
Temperature gradients
Tips
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