Zobrazeno 1 - 10
of 42
pro vyhledávání: '"H.-C. Semmelhack"'
Autor:
H.-C. Semmelhack, K. Schindler, Andreas Rahm, Gerald Wagner, Roland Höhne, Daniel Spemann, K.H. Hallmeier, Pablo Esquinazi
Publikováno v:
Carbon. 44:3064-3072
Carbon–sulfur films were grown by pulsed laser deposition at room temperature using different graphite–sulfur mixtures as targets. The structure of the films was characterized by X-ray diffraction and transmission electron microscopy. The composi
Autor:
Emre Erdem, Anke Matthes, Juras Banys, Holger Rumpf, H.-C. Semmelhack, Hans-Jürgen Gläsel, Eberhard Hartmann, Dietmar Hirsch, Rolf Böttcher
Publikováno v:
Journal of Physics: Condensed Matter. 18:3861-3874
The CPP (combined polymerization and pyrolysis) preparation route, in its enhanced liquid-precursor-based version, was combined with consecutive soft milling. For studies of temperature- and size-dependent structural changes occurring in ferroelectri
Publikováno v:
The European Physical Journal B. 45:223-230
Exchange biasing was studied in an exchange-spring system consisting of two ferrimagnetic films with different coercivity. Magnetite and Co-Fe ferrite were chosen as the soft and hard magnetic bilayer components, respectively. The samples were epitax
Autor:
Roland Höhne, H.-C. Semmelhack, Pablo Esquinazi, U. Köhler, Michael Ziese, Alberto Bollero, Annette Setzer
Publikováno v:
Journal of Magnetism and Magnetic Materials. 285:279-289
The pulsed laser deposition technique has been used to produce magnetite (Fe 3 O 4 ) films with thickness ranging from 26 to 320 nm grown on MgAl 2 O 4 (1 0 0) substrates. Microstructural characterisation of the films has revealed enlarged grains wit
Publikováno v:
Journal of Magnetism and Magnetic Materials. 279:331-342
The magnetoresistance of step edges in magnetite films was systematically studied. An enhancement of the magnetoresistance by the introduction of step edges was observed, especially in the high-field regime. This was modelled by spin-disorder scatter
Autor:
H.-C. Semmelhack, Marius Grundmann, H. von Wenckstern, Gabriele Benndorf, Andreas Rahm, V. Riede, Michael Lorenz, E. M. Kaidashev, Holger Hochmuth, Daniel Spemann, Carsten Bundesmann
Publikováno v:
Solid-State Electronics. 47:2205-2209
A consistent set of epitaxial, n-type conducting ZnO thin films, nominally undoped, doped with Ga or Al, or alloyed with Mg or Cd, was grown by pulsed laser deposition (PLD) on single-crystalline c-plane sapphire (0 0 0 1) substrates, and characteriz
Publikováno v:
Journal of Magnetism and Magnetic Materials. 246:327-334
The magnetic anisotropy of epitaxial manganite La 0.7 A 0.3 MnO 3 films (A = Ca, Sr, Ba, □=vacancy) is studied as a function of tolerance factor. Within the film plane a biaxial magnetocrystalline anisotropy was observed with an anisotropy constant
Publikováno v:
Scopus-Elsevier
We have measured the low-temperature ( K) specific heat and heat release of small amorphous and crystalline SiO2 particles embedded in Teflon and of Vycor. The temperature and time dependence of these properties have been interpreted in terms of the
Autor:
Rolf Böttcher, C. Klimm, E. Hartmann, Dieter Michel, H.-C. Semmelhack, H. Rumpf, Josef Hormes, H.-J. Gläsel, D. Hirsch
Publikováno v:
Journal of Materials Science. 34:2319-2323
A recipe has been elaborated for preparing barium titanate (BaTiO3) particles in a nucleation route which is mediated by thermal decomposition of polymeric barium titanium methacrylate. Adjustment of particle size d in the range from 10 nm to 1.5 μm
Autor:
H.-C. Semmelhack, Pablo Esquinazi, C.A. Kleint, Michael Lorenz, Michael Krause, T. Walter, R. Höhne
Publikováno v:
Journal of Applied Physics. 84:5097-5104
Magnetic exchange anisotropy has been studied in epitaxial Fe3O4 based bilayers grown by pulsed laser deposition on MgO substrates. Measurements of the exchange biasing of the Fe3O4 magnetization curves were performed on (100)- and (111)-oriented Fe3