Spintronic detection of interfacial magnetic switching in a paramagnetic thin film of tris(8-hydroxyquinoline)iron(III)

Dali Sun, Christopher M. Kareis, Kipp J. van Schooten, Wei Jiang, Gene Siegel, Marzieh Kavand, Royce A. Davidson, William W. Shum, Chuang Zhang, Haoliang Liu, Ashutosh Tiwari, Christoph Boehme, Feng Liu, Peter W. Stephens, Joel S. Miller, and Z. Valy Vardeny
Phys. Rev. B 95, 054423 – Published 17 February 2017
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Abstract

Organic semiconductors find increasing importance in spin transport devices due to the modulation and control of their properties through chemical synthetic versatility. The organic materials have been used as interlayers between two ferromagnet (FM) electrodes in organic spin valves, as well as for magnetic spin manipulation of metal-organic complexes at the molecular level. In the latter, the substrate-induced magnetic switching in a paramagnetic molecule has been evoked extensively but studied by delicate surface spectroscopies. Here we present evidence of the substantial magnetic switching in a thin film of the paramagnetic molecule, tris(8-hydroxyquinoline)iron(III) (Feq3) deposited on a FM substrate, using the magnetoresistance response of electrical spin-injection in an organic spin valve structure, as well as the inverse-spin-Hall effect induced by state-of-art pulsed microwave spin-pumping. We show that interfacial spin control at the molecular level may lead to a macroscopic organic spin transport device, thus bridging the gap between organic spintronics and molecular spintronics.

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  • Received 26 May 2016
  • Revised 11 November 2016

DOI:https://doi.org/10.1103/PhysRevB.95.054423

©2017 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Dali Sun1,*, Christopher M. Kareis2, Kipp J. van Schooten1, Wei Jiang3, Gene Siegel3, Marzieh Kavand1, Royce A. Davidson2, William W. Shum2, Chuang Zhang1, Haoliang Liu1, Ashutosh Tiwari3, Christoph Boehme1, Feng Liu3, Peter W. Stephens4, Joel S. Miller2, and Z. Valy Vardeny1,†

  • 1Department of Physics & Astronomy, University of Utah, Salt Lake City, Utah 84112, USA
  • 2Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, USA
  • 3Department of Material Science & Engineering, University of Utah, Salt Lake City, Utah 84112, USA
  • 4Department of Physics & Astronomy, Stony Brook University, Stony Brook, New York 11794, USA

  • *Current address: Department of Physics, North Carolina State University, Raleigh, North Carolina 27695, USA.
  • To whom correspondence should be addressed: val@physics.utah.edu

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Issue

Vol. 95, Iss. 5 — 1 February 2017

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