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@ARTICLE{Sagarna:135215,
      author       = {Sagarna, L. and Rushchanskii, K. Z. and Maegli, A. and
                      Yoon, S. and Populoh, S. and Shkabko, A. and Pokrant, S. and
                      Ležaić, M. and Waser, R. and Weidenkaff, A.},
      title        = {{S}tructure and thermoelectric properties of
                      {E}u{T}i({O},{N})3 ± δ},
      journal      = {Journal of applied physics},
      volume       = {114},
      number       = {3},
      issn         = {0021-8979},
      address      = {Melville, NY},
      publisher    = {American Institute of Physics},
      reportid     = {FZJ-2013-03175},
      pages        = {033701 -},
      year         = {2013},
      abstract     = {After partial substitution of nitrogen for oxygen in
                      EuTiO3, the crystal structure, thermoelectric properties,
                      morphology, and electronic structure of the products were
                      analyzed and compared with pristine EuTiO3. The space group
                      of EuTi(O,N)3 ±  δ was orthorhombic Pnma due to the
                      tilt and rotation of the anion octahedra, compared to cubic
                      Pm3¯m of EuTiO3 (at room temperature). The thermoelectric
                      properties of oxynitride polycrystalline bodies sintered in
                      three different ways were investigated in the temperature
                      range of 300 K < T < 950 K. The Seebeck
                      coefficients (S) of the oxynitrides were lower compared with
                      the oxide, and the electrical resistivities (ρ) were
                      increased about one order of magnitude. The activation
                      energies (E A) indicated a larger band gap of
                      EuTi(O,N)3 ±  δ when compared to the pristine EuTiO3
                      (∼1.3 eV compared to 0.98 eV). A morphological
                      characterization by transmission electron microscopy and
                      scanning electron microscopy illustrated intrinsic nanopores
                      within the individual particles and weak
                      grain-interconnections indicating poor intergrain electron
                      transport. Ab initio calculations of the electronic
                      structures confirmed a larger band gap of the distorted
                      crystal structure of the oxynitride and showed a decrease of
                      the density of states at the Fermi level, explaining the
                      reduction of the measured S.},
      cin          = {PGI-1 / PGI-7 / JARA-FIT},
      ddc          = {530},
      cid          = {I:(DE-Juel1)PGI-1-20110106 / I:(DE-Juel1)PGI-7-20110106 /
                      $I:(DE-82)080009_20140620$},
      pnm          = {421 - Frontiers of charge based Electronics (POF2-421)},
      pid          = {G:(DE-HGF)POF2-421},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000322202700050},
      doi          = {10.1063/1.4813098},
      url          = {https://juser.fz-juelich.de/record/135215},
}