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Title: Interfacial spectroscopic characterization of organic/ferromagnet hetero-junction of 3,4,9,10-perylene-teracarboxylic dianhydride-based organic spin valves

We report interfacial characterization of 3,4,9,10-perylene-teracarboxylic dianhydride (PTCDA)-based organic spin valves (OSV) dusted with a thin layer of partially oxidized alumina at the organic semiconductor (OSC)/ferromagnet (FM) interfaces. Up to 13.5% magnetoresistance is achieved at room temperature. X-ray photoelectron spectroscopy measurements reveal interfacial electronic interaction between PTCDA and FM while the application of a thin alumina layer at the PTCDA/FM interfaces prevents the electronic hybridization and effectively preserves the spin injection into the OSC spacer. This finding demonstrates the critical effect of interfacial structure on magnetotransport behavior in OSV.
Authors:
; ;  [1] ;  [1] ;  [2] ; ; ; ; ; ;  [3] ;  [4] ;  [1] ;  [2]
  1. Department of Physics, National Taiwan University, 10617 Taipei, Taiwan (China)
  2. (China)
  3. National Synchrotron Radiation Research Center, 30076 Hsinchu, Taiwan (China)
  4. Department of Physics, Chinese Culture University, 11114 Taipei, Taiwan (China)
Publication Date:
OSTI Identifier:
22293119
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 8; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ALUMINIUM OXIDES; CONNECTORS; HYBRIDIZATION; INTERFACES; MAGNETORESISTANCE; ORGANIC SEMICONDUCTORS; PERYLENE; SEMICONDUCTOR JUNCTIONS; SPACERS; SPIN; THIN FILMS; VALVES; X-RAY PHOTOELECTRON SPECTROSCOPY