Direct evidence of electron spin polarization from an organic-based magnet: [FeII(TCNE)(NCMe)2][FeIIICl4]

A. N. Caruso, Konstantin I. Pokhodnya, William W. Shum, W. Y. Ching, Bridger Anderson, M. T. Bremer, E. Vescovo, Paul Rulis, A. J. Epstein, and Joel S. Miller
Phys. Rev. B 79, 195202 – Published 4 May 2009

Abstract

Direct evidence of an organic-based magnet with a finite electron spin polarization at the Fermi edge is shown from spin-resolved photoemission of the [FeII(TCNE)(NCMe)2][FeIIICl4] organic-based magnet. The 23% majority-based spin polarization at the Fermi edge is observed at 80 K in zero applied field. Ab initio calculations at the density functional level (0 K) are in accord with a semiconductor with 100% majority-based electron spin polarization at the band edges, commensurate with our experimental results and model prediction for a half-semiconductor. Organic-based magnets may prove to be important for realizing polarized electron injection into semiconductors for magnetoelectronic applications.

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  • Received 26 March 2009

DOI:https://doi.org/10.1103/PhysRevB.79.195202

©2009 American Physical Society

Authors & Affiliations

A. N. Caruso1,*, Konstantin I. Pokhodnya2,3,4, William W. Shum2, W. Y. Ching1, Bridger Anderson3, M. T. Bremer3, E. Vescovo5, Paul Rulis1, A. J. Epstein4, and Joel S. Miller2

  • 1Department of Physics, University of Missouri–Kansas City, Kansas City, Missouri 64110, USA
  • 2Department of Chemistry, University of Utah, Salt Lake City, Utah 84112-0850, USA
  • 3Center for Nanoscale Science and Engineering, North Dakota State University, Fargo, North Dakota 58102, USA
  • 4Department of Physics and Department of Chemistry, The Ohio State University, Columbus, Ohio 43210-1117, USA
  • 5National Synchrotron Light Source, Brookhaven National Laboratory, Upton, New York 11973, USA

  • *Corresponding author. Present address: 5110 Rockhill Road, 257 Flarsheim Hall. FAX: 816-235-5221; carusoan@umkc.edu

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Issue

Vol. 79, Iss. 19 — 15 May 2009

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