Thermally driven spin and charge currents in thin NiFe2O4/Pt films

Daniel Meier; Timo Kuschel; Liming Shen; Arunava Gupta; Takashi Kikkawa; Ken-ichi Uchida; Eiji Saitoh; Jan-Michael Schmalhorst; Günter Reiss

doi:10.1103/PhysRevB.87.054421

Thermally driven spin and charge currents in thin NiFe2O4/Pt films

Materials Science 2016-08-02 v1

Authors: Daniel Meier , Timo Kuschel , Liming Shen , Arunava Gupta , Takashi Kikkawa , Ken-ichi Uchida , Eiji Saitoh , Jan-Michael Schmalhorst , Günter Reiss

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Abstract

We present results on the longitudinal spin Seebeck effect (LSSE) shown by semiconducting ferrimagnetic NiFe2O4/Pt films from room temperature down to 50K base temperature. To the best of our knowledge, this is the first observation of spin caloric effect in NiFe2O4 thin films. The temperature dependence of the conductivity has been studied in parallel to obtain information about the origin of the electric potentials detected at the Pt coverage of the ferrimagnet in order to distinguish the LSSE from the anomalous Nernst effect. Furthermore, the dependence of the LSSE on temperature gradients as well as the influence of an external magnetic field direction is investigated.

Keywords

longitudinal spin Seebeck effect NiFe2O4/Pt films spin caloritronics anomalous Nernst effect ferrimagnetic thin films thermal gradient spin current

Cite

@article{arxiv.1301.7313,
  title  = {Thermally driven spin and charge currents in thin NiFe2O4/Pt films},
  author = {Daniel Meier and Timo Kuschel and Liming Shen and Arunava Gupta and Takashi Kikkawa and Ken-ichi Uchida and Eiji Saitoh and Jan-Michael Schmalhorst and Günter Reiss},
  journal= {arXiv preprint arXiv:1301.7313},
  year   = {2016}
}

Thermally driven spin and charge currents in thin NiFe2O4/Pt films

Abstract

Keywords

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