Skip to main content

21 Result(s)

within D Hesse Remove this filter Physics Remove this filter

previous disabled Page of 2
and

  1. Article

    Open Access

    Ultrafast structural dynamics of perovskite superlattices

    Femtosecond x-ray diffraction provides direct insight into the ultrafast reversible lattice dynamics of materials with a perovskite structure. Superlattice (SL) structures consisting of a sequence of nanometer...

    M. Woerner, C. v. Korff Schmising, M. Bargheer, N. Zhavoronkov… in Applied Physics A (2009)

    Download PDF (674 KB)

  2. No Access

    Chapter and Conference Paper

    Ultrafast Structural Dynamics of Polar Solids Studied by Femtosecond X-Ray Diffraction

    We discuss recent progress in ultrafast x-ray diffraction, addressing photoinduced structural dynamics in ferroelectric superlattices and polar molecular crystals. Elongations of coupled phonon modes affecting...

    T. Elsaesser, C. von Korff Schmising, N. Zhavoronkov… in Ultrafast Phenomena XVI (2009)

  3. No Access

    Chapter and Conference Paper

    Femtosecond X-ray Diffraction Study of the Ultrafast Coupling between Magnetization and Structure in the Ferromagnet SrRuO3

    Femtosecond optical excitation of magnetically ordered SrRuO3 nanolayers leads to an ultrafast demagnetization and a concomitant magnetoelastic contractive stress. The resulting ultrafast structural response of t...

    C. v Korff Schmising, M. Bargheer, A. Harpoeth, N. Zhavoronkov… in Ultrafast Phenomena XVI (2009)

  4. No Access

    Chapter and Conference Paper

    Diffraction contrast imaging and high resolution transmission electron microscopy of multiferroic thin films and heterostructures

    Multiferroic materials exhibit simultaneous ferroelectric and ferromagnetic properties and are extensively studied because of their potential applications in multifunctional devices as well as for the understa...

    B. I. Birajdar, I. Vrejoiu, X. S. Gao… in EMC 2008 14th European Microscopy Congress… (2008)

  5. No Access

    Chapter and Conference Paper

    Ferroelectric materials and structures suitable for data storage: The role of microscopies in establishing preparation-microstructure-property relations

    Among the various possible routes towards solid-state non-volatile random access memories (NV-RAMs) of high memory density, ferroelectric random access memories (FRAMs) offer very good prospects. Non-volatilit...

    D. Hesse, M. Alexe, K. Boldyreva, H. Han… in EMC 2008 14th European Microscopy Congress… (2008)

  6. No Access

    Article

    Accurate time delay determination for femtosecond X-ray diffraction experiments

    We report on a versatile and accurate method for determining the time delay between femtosecond X-ray and optical pulses in an optical pump/X-ray diffraction probe experiment. Upon excitation with moderate pum...

    C. von Korff Schmising, M. Bargheer, M. Kiel, N. Zhavoronkov… in Applied Physics B (2007)

  7. No Access

    Chapter and Conference Paper

    Probing strain propagation in nanolayered perovskites by diffraction of femtosecond x-rays

    Propagating strain waves in SrTiO3, launched from PbZr0.2Ti0.8O3 films are measured by time-resolved x-ray diffraction. X-ray interference among contributions from differently strained regions allow to determine ...

    C. v. Korff Schmising, M. Bargheer, M. Kiel, N. Zhavoronkov… in Ultrafast Phenomena XV (2007)

  8. No Access

    Article

    A comparative microstructural study of compositionally up- and down-graded (Ba,Sr)TiO3 thin films epitaxially grown on (La,Sr)CoO3-covered MgO(100) substrates by pulsed laser deposition

    We report a comparative study of the microstructure of compositionally graded (Ba1-xSrx)TiO3 (BST) films with two compositionally graded directions, up and down, with respect to the substrate, which were deposite...

    X.H. Zhu, H.L.W. Chan, C.-L. Choy, K.-H. Wong, D. Hesse in Applied Physics A (2006)

  9. No Access

    Article

    Self-organized structure formation on the bottom of femtosecond laser ablation craters in glass

    Using femtosecond laser pulses (150 fs duration at λ=400 nm) for ablation experiments on glass samples with and without enclosed silver nanoparticles, characteristic sub-micrometer surface topologies are obser...

    G. Seifert, M. Kaempfe, F. Syrowatka, C. Harnagea, D. Hesse… in Applied Physics A (2005)

  10. No Access

    Article

    Morphology dependence of the dielectric properties of epitaxial BaTiO3 films and epitaxial BaTiO3/SrTiO3 multilayers

    Epitaxial BaTiO3 films and epitaxial BaTiO3/SrTiO3 multilayers were grown by pulsed laser deposition on vicinal surfaces of (001)-oriented Nb-doped SrTiO3 (SrTiO3 : Nb) single-crystal substrates. Atomic force mic...

    A. Visinoiu, R. Scholz, M. Alexe, D. Hesse in Applied Physics A (2005)

  11. No Access

    Article

    Morphology and microstructure of all-epitaxial ferroelectric tri-layered (Bi,La)4Ti3O12/Pb(Zr0.4Ti0.6)O3/ (Bi,La)4Ti3O12 thin films on SrTiO3(011)

    The morphology and microstructure of all-epitaxial (Bi,La)4Ti3O12/Pb(Zr0.4Ti0.6)O3/(Bi,La)4Ti3O12 (BLT/PZT/BLT) tri-layered ferroelectric films, grown on (011)-oriented SrTiO3 (STO) substrates by pulsed laser dep...

    X.H. Zhu, D.H. Bao, M. Alexe, D. Hesse in Applied Physics A (2005)

  12. No Access

    Article

    Epitaxial growth of non-c-oriented ferroelectric SrBi2Ta2O9 thin films on Si(100) substrates

    Epitaxial SrBi2Ta2O9 (SBT) thin films with well-defined (116) orientation have been grown by pulsed laser deposition on Si(100) substrates covered with an yttria-stabilized ZrO2 (YSZ) buffer layer and an epitaxia...

    H.N. Lee, S. Senz, A. Visinoiu, A. Pignolet, D. Hesse, U. Gösele in Applied Physics A (2000)

  13. No Access

    Article

    100-nm lateral size ferroelectric memory cells fabricated by electron-beam direct writing

    A fundamental limitation in the recent development of non-volatile ferroelectric memories of 64-Mbit to 4-Gbit densities was found to be the problem to scale ferroelectric capacitor cell sizes down below 1 μm2. I...

    M. Alexe, C. Harnagea, W. Erfurth, D. Hesse, U. Gösele in Applied Physics A (2000)

  14. No Access

    Article

    Quantitative ferroelectric characterization of single submicron grains in Bi-layered perovskite thin films

    The local polarization state and the electromechanical properties of ferroelectric thin films can be probed via the converse piezoelectric effect using scanning force microscopy (SFM) combined with a lock-in t...

    C. Harnagea, A. Pignolet, M. Alexe, D. Hesse, U. Gösele in Applied Physics A (2000)

  15. No Access

    Article

    Microstructure and electrical properties of textured Sr0.51Ba0.48La0.01Nb2O6 thin films

    Sr0.51Ba0.48La0.01Nb2O6 (SBLN) thin films were prepared on platinized silicon substrates by pulsed laser deposition (PLD) combined with annealing technique. The preferred orientation, surface morphology, composit...

    Z. Song, C. Lin, L. Wang, J. Huang, D. Hesse, N.D. Zakharov, H. Xu… in Applied Physics A (2000)

  16. No Access

    Article

    Orientation dependence of ferroelectricity in pulsed-laser-deposited epitaxial bismuth-layered perovskite thin films

    Thin films of bismuth-layered perovskites such as SrBi2Ta2O9, Bi4Ti3O12, and BaBi4Ti4O15 with preferred orientations were grown by pulsed laser deposition on epitaxial conducting LaNiO3 electrodes on single-cryst...

    A. Pignolet, C. Schäfer, K.M. Satyalakshmi, C. Harnagea, D. Hesse… in Applied Physics A (2000)

  17. No Access

    Chapter

    Switching of Ferroelectric Nanostructures

    Ferroelectric domain structures of epitaxial SrBi2Ta2O9 (SBT), BaBi4Ti4O15 (BBiT) and Bi4Ti3O12 (BiT) thin films as well as PZT nanostructures have been imaged at the nanometer scale. The surface polarization sta...

    C. Harnagea, M. Alexe, A. Pignolet… in Piezoelectric Materials: Advances in Scien… (2000)

  18. No Access

    Chapter

    Nano-Size Ferroelectric Structures

    In the present work ferroelectric structures with lateral sizes as small as 100 nm were fabricated by electron beam direct writing. Switching of single 100 nm cells was achieved and piezoelectric hysteresis lo...

    M. Alexe, C. Harnagea, A. Pignolet, D. Hesse… in Piezoelectric Materials: Advances in Scien… (2000)

  19. No Access

    Article

    Wafer bonding of gallium arsenide on sapphire

    ) sapphire in a micro-cleanroom at room temperature under hydrophilic or hydrophobic surface conditions. Subsequent heating up to 500 °C increased the bond energy of the GaAs-on-sapphire (GOS) wafer pair close...

    P. Kopperschmidt, G. Kästner, S. Senz, D. Hesse, U. Gösele in Applied Physics A (1997)

  20. No Access

    Article

    Back-to-back substrate wafer bonding: A new approach to the fabrication of double-side coated wafers

    We present a novel method for fabrication of double side coated wafers by back-to-back Direct Wafer Bonding (DWB). Two 3 inch sapphire wafers (R-cut) were coated each with YBa \(_2\) ...

    P. Kopperschmidt, G. Kästner, D. Hesse, U.M. Gösele, M. Lorenz in Applied Physics A (1997)

previous disabled Page of 2