Filters

2019 - 201912020 - 20211

More filters

2021 - 20222
Reset filters

Settings

Author: Bickermann, Matthias × DDC: 660 ×

Search Results

Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    REScO3 Substrates—Purveyors of Strain Engineering
    (Weinheim : Wiley-VCH, 2019) Klimm, Detlef; Guguschev, Christo; Ganschow, Steffen; Bickermann, Matthias; Schlom, Darrell G.
    The thermodynamic and crystallographic background for the development of substrate crystals that are suitable for the epitaxial deposition of biaxially strained functional perovskite layers is reviewed. In such strained layers the elastic energy delivers an additional contribution to the Gibbs free energy, which allows the tuning of physical properties and phase transition temperatures to desired values. For some oxide systems metastable phases can even be accessed. Rare-earth scandates, REScO3, are well suited as substrate crystals because they combine mechanical and chemical stability in the epitaxy process with an adjustable range of pseudo-cubic lattice parameters in the 3.95 to 4.02 Å range. To further tune the lattice parameters, chemical substitution for the RE or Sc is possible. © 2019 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
  • Thumbnail Image
    Item
    Phase diagram studies for the growth of (Mg,Zr):SrGa12O19 crystals
    (Dordrecht [u.a.] : Springer Science + Business Media B.V., 2021) Klimm, Detlef; Szczefanowicz, Bartosz; Wolff, Nora; Bickermann, Matthias
    By differential thermal analysis, a concentration field suitable for the growth of Zr, Mg co-doped strontium hexagallate crystals was observed that corresponds well with known experimental results. It was shown that the melting point of doped crystal is ca. 60 K higher than that of undoped crystals. This higher melting points indicate hexagallate phase stabilization by Zr, Mg co-doping and increase the growth window of (Mg,Zr):SrGa12O19, compared to undoped SrGa12O19 that grows from SrO–Ga2O3 melts.