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@ARTICLE{Knigshofen:866544,
      author       = {Königshofen, Samuel and Matthes, Frank and Bürgler,
                      Daniel E. and Schneider, Claus M. and Dirksen, Elena and
                      Müller, Thomas J. J.},
      title        = {{E}pitaxial and contamination-free {C}o(0001) electrodes on
                      insulating substrates for molecular spintronic devices},
      journal      = {Thin solid films},
      volume       = {680},
      issn         = {0040-6090},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2019-05634},
      pages        = {67 - 74},
      year         = {2019},
      abstract     = {The growing field of molecular spintronics is an auspicious
                      route to future concepts of data storage and processing. It
                      has been reported that the hybridization of the electronic
                      structures of non-magnetic organic molecules and
                      ferromagnetic transition-metal (FM) surfaces can form new
                      magnetic units, so-called hybrid molecular magnets, with
                      distinct magnetic properties, which promise molecular
                      spintronic devices with extremely high information density
                      and low energy consumption. The investigation and profound
                      understanding of these device concepts require the formation
                      of clean and epitaxial interfaces between the surface of a
                      FM bottom electrode and molecular thin films. This can only
                      be realized under ultra-high vacuum conditions. In addition,
                      the FM electrodes must be grown on an insulating substrate
                      to electrically separate neighboring devices. Here, we
                      report on procedures to realize an entirely in-situ
                      preparation of mesoscopic test devices featuring
                      structurally and chemically well-defined interfaces.
                      Au(111)-buffered Co(0001) electrodes are deposited by
                      molecular-beam epitaxy onto sapphire or mica substrates
                      using a shadow-mask to define the geometry. The surface
                      quality is subsequently characterized by scanning tunneling
                      microscopy (STM) and other surface science analysis tools.
                      2,7-dibenzyl 1,4,5,8-naphthalenetetracarboxylic diimide
                      (BNTCDI), which serves as an exemplary molecule, is sublimed
                      through another shadow-mask, and the interface formation in
                      the monolayer regime is also studied by STM. Finally, we
                      deposit a Cu top electrode through yet another shadow-mask
                      to complete a mesoscopic (200 × 200 μm2) test
                      device, which reveals in ex-situ transport measurements for
                      the Co/BNTCDI/Cu junction non-metallic behavior and a
                      resistance-area product of 24 MΩ·μm2 at 10 K.},
      cin          = {PGI-6},
      ddc          = {660},
      cid          = {I:(DE-Juel1)PGI-6-20110106},
      pnm          = {522 - Controlling Spin-Based Phenomena (POF3-522)},
      pid          = {G:(DE-HGF)POF3-522},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000467389900010},
      doi          = {10.1016/j.tsf.2019.04.021},
      url          = {https://juser.fz-juelich.de/record/866544},
}