Asymmetric nonlocal signal induced by thermoelectric effects in a lateral spin valve

Nagarjuna Asam, Taisei Ariki, Takashi Kimura

Research output: Contribution to journalArticle

Abstract

We demonstrate that the heat flow arising from the Joule heating produces not only the conventional thermal spin injection but also additional thermo-electric effects both in current and voltage probes. The excellent thermal spin injection property for the CoFeAl enables us to distinguish the ordinal thermal spin valve signal and the unconventional asymmetric field dependence in the nonlocal 2nd harmonic signal. We show that the observed unique field dependence can be well explained by the anomalous Nenrst effect in the ferromagnetic voltage probe and the anomalous thermal Hall effect in the ferromagnetic current probe. The validity of the proposed mechanism was confirmed in various devices with different probe configurations.

Original languageEnglish
Article number113738
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Volume117
DOIs
Publication statusPublished - Mar 2020

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Thermoelectricity
Magnetic devices
cobalt alloys
Cobalt alloys
Ferromagnetic materials
Ternary alloys
iron alloys
ferromagnetic materials
Iron alloys
Ferromagnetism
ternary alloys
Magnetoresistance
aluminum alloys
ferromagnetism
Aluminum alloys
probes
injection
Joule heating
Hall effect
Electric potential

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

Cite this

Asymmetric nonlocal signal induced by thermoelectric effects in a lateral spin valve. / Asam, Nagarjuna; Ariki, Taisei; Kimura, Takashi.

In: Physica E: Low-Dimensional Systems and Nanostructures, Vol. 117, 113738, 03.2020.

Research output: Contribution to journalArticle

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