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

D. Meier, T. Kuschel, L. Shen, A. Gupta, T. Kikkawa, K. Uchida, E. Saitoh, J.-M. Schmalhorst, and G. Reiss
Phys. Rev. B 87, 054421 – Published 19 February 2013

Abstract

We present results on the longitudinal spin Seebeck effect (LSSE) shown by semiconducting ferrimagnetic NiFe2O4/Pt films from room temperature down to 50 K base temperature. 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.

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  • Received 31 January 2013

DOI:https://doi.org/10.1103/PhysRevB.87.054421

©2013 American Physical Society

Authors & Affiliations

D. Meier1,*, T. Kuschel1, L. Shen2, A. Gupta2, T. Kikkawa3, K. Uchida3,4, E. Saitoh3,5,6,7, J.-M. Schmalhorst1, and G. Reiss1

  • 1Thin Films and Physics of Nanostructures, Department of Physics, Bielefeld University, D-33501, Germany
  • 2Center for Materials for Information Technology, University of Alabama, Tuscaloosa Alabama 35487, USA
  • 3Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
  • 4PRESTO, Japan Science and Technology Agency, Saitama 332-0012, Japan
  • 5WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
  • 6CREST, Japan Science and Technology Agency, Tokyo 102-0076, Japan
  • 7Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan

  • *dmeier@physik.uni-bielefeld.de; www.spinelectronics.de

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Issue

Vol. 87, Iss. 5 — 1 February 2013

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