Search Results - (Author, Cooperation:M. Steiner)

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  1. 1
    Staff View
    Publication Date:
    2018-06-01
    Publisher:
    American Physical Society (APS)
    Electronic ISSN:
    1098-4402
    Topics:
    Physics
    Keywords:
    Particle-Beam Sources
    Published by:
    http://www.aps.org/

    Latest Papers from Table of Contents or Articles in Press
  2. 2
    Staff View
    Publication Date:
    2012-02-22
    Publisher:
    American Association for the Advancement of Science (AAAS)
    Print ISSN:
    0036-8075
    Electronic ISSN:
    1095-9203
    Topics:
    Biology
    Chemistry and Pharmacology
    Computer Science
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    Biological Evolution ; Cyanobacteria/genetics ; Cyanophora/*genetics ; *Evolution, Molecular ; Gene Transfer, Horizontal ; Genes, Bacterial ; *Genome, Plant ; Molecular Sequence Data ; Photosynthesis/*genetics ; Phylogeny ; Symbiosis
    Published by:
    http://www.aaas.org/

    Latest Papers from Table of Contents or Articles in Press
  3. 3
    J. Liu ; M. Steiner ; J. A. Dunlop ; H. Keupp ; D. Shu ; Q. Ou ; J. Han ; Z. Zhang ; X. Zhang
    Nature Publishing Group (NPG)
    Published 2011
    Staff View
    Publication Date:
    2011-02-26
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    Animals ; Arthropods/*anatomy & histology/*classification ; China ; Extinction, Biological ; Extremities/*anatomy & histology ; *Fossils ; *Phylogeny
    Published by:
    http://www.nature.com/

    Latest Papers from Table of Contents or Articles in Press
  4. 4
    Staff View
    Publication Date:
    2018-01-18
    Publisher:
    Wiley-Blackwell
    Electronic ISSN:
    2045-7758
    Topics:
    Biology
    Published by:
    http://www.wiley.com/wiley-blackwell

    Latest Papers from Table of Contents or Articles in Press
  5. 5
    Staff View
    Type of Medium:
    book
    Publication Date:
    1998
    Keywords:
    Ballungsraum ; Industrieregion ; Region ; Produktionstechnik ; Technologische Entwicklung ; Europäische Integration ; Autoindustrie ; Kleine und mittlere Unternehmen ; Lernende Organisation ; Regionale Wirtschaftsförderung ; Wettbewerbsfähigkeit ; Wirtschaftsgeografie ; Wirtschaftssystem ; Handhabungstechnik ; Ökonomie ; Innovation ; Kooperation ; Betrieb ; Europäische Union ; Chicago, Ill. ; Schottland ; Steiermark ; Österreich
    Language:
    English

    FIS Bildung Literaturdatenbank
  6. 6
    Staff View
    Type of Medium:
    article
    Publication Date:
    2019
    Keywords:
    Stufenweise Arbeitsaufnahme ; Rehabilitationsmaßnahme ; Rehabilitationspolitik ; Case Management ; Prävention ; Rehabilitationsverlauf ; Behinderter ; Rehabilitand ; Unfallverletzter ; Schweiz ; Österreich
    In:
    Arbeitsmedizin, Sozialmedizin, Umweltmedizin, Bd. 54 (2019) H. 4, S. 246-252, 0300-581X
    0944-6052
    2363-4669
    Language:
    German

    FIS Bildung Literaturdatenbank
  7. 7
    Staff View
    Publication Date:
    2018-08-02
    Publisher:
    Molecular Diversity Preservation International (MDPI)
    Electronic ISSN:
    2073-4425
    Topics:
    Biology
    Published by:
    http://www.mdpi.org/

    Latest Papers from Table of Contents or Articles in Press
  8. 8
    Siemensmeyer, K. ; Kakurai, K. ; Steiner, M. ; Jyrkkiö, T. A. ; Huiku, M. T. ; Clausen, K. N.

    [S.l.] : American Institute of Physics (AIP)
    Published 1990
    Staff View
    ISSN:
    1089-7550
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    We have studied the magnetic structure of the nuclear spin system in Cu below 60 nK by means of neutron scattering. The observation of the nuclear (100) superlattice reflection proves the theoretically predicted antiferromagnetic arrangement of the nuclear spins. The critical field at the lowest temperatures was 0.24 mT. Around 0.1 mT the (100) reflection could not be observed. This is taken as an indication for, possibly, a reorientation phase transitition at this field. Therefore, the phase diagram contains at least two phases. For 0.1 mT〈B〈0.24 mT strong time dependencies of the ordering were observed. At low fields (B〈0.1 mT) nucleation times of the order of 10 s have been observed. These results are discussed with respect to the cooling technique: Adiabatic demagnetization requires constant entropy, a rather unusual way to bring a system from the paramagnetic to the ordered phase.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.344580

    Articles: DFG German National Licenses
  9. 9
    Steiner, M.

    [S.l.] : American Institute of Physics (AIP)
    Published 1990
    Staff View
    ISSN:
    1089-7550
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    In 1D magnets contributions to the spin dynamics which are outside the scope of spin-wave theory can be studied theoretically as well as experimentally. Two prominent examples of such effects are discussed here: solitons and the Haldane gap. We discuss inelastic polarized neutron scattering results on the stability of solitons in CsNiF3 and on the existence of the Haldane gap in CsNiCl3. In both cases, the separate determination of the different correlation functions 〈SαSα〉 with α=x,y,z is essential for definite conclusions: Solitons in CsNiF3 appear to be much more stable than expected from classical theories, and the Haldane gap is the only explanation for the observed gaps in CsNiCl3.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.345895

    Articles: DFG German National Licenses
  10. 10
    Enkler, D. ; Roters, A. ; Steiner, M.

    [S.l.] : American Institute of Physics (AIP)
    Published 1993
    Staff View
    ISSN:
    1089-7550
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    With a newly built superconducting quantum interference device magnetometer, the time range of measurements of the thermoremanent magnetization (TRM) was extended to less than 10 ms. This new method allows a direct investigation of aging and relaxation in the spin glass region for short times. As a first example for fast TRM, the magnetization in a single crystal of the insulating spin glass CsNiFeF6 was measured in the time range −2〈log(t/s)〈3 at magnetic fields between 2 and 20 G at temperatures between 4.7 and 1.7 K. Additionally, the zero field and field cooled magnetization of this sample to temperatures up to 9 K was studied.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.353667

    Articles: DFG German National Licenses
  11. 11
    Staff View
    ISSN:
    1089-7550
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    The spontaneous nuclear spin ordering in the simple diamagnetic metals Cu and Ag has been studied by neutron diffraction using the spin dependent part of the nuclear cross section. Simple antiferromagnetic ordering of type I has been found in zero field for these fcc-systems below 60 and 560 pK for Cu and Ag, respectively. The ordering in an applied field has been investigated and the phase diagrams have been determined: a very complex phase diagram with different magnetic structures, strong hysteresis, and time dependence was found for Cu, while in Ag the phase diagram is very simple. Comparison with ab initio calculations allows a rather deep insight into the interactions leading to the ordering. © 1996 American Institute of Physics.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.361579

    Articles: DFG German National Licenses
  12. 12
    Mak, Chee-leung ; Bak, J. ; Sooryakumar, R. ; Steiner, M. M. ; Jonker, B. T.

    [S.l.] : American Institute of Physics (AIP)
    Published 1994
    Staff View
    ISSN:
    1089-7550
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    In this paper we discuss photoluminescence (PL) and Raman excitations in the diluted magnetic semiconductors Zn1−xCoxSe and Zn1−xFexSe. The PL spectra associated with isolated crystal field d levels are found to rapidly weaken and/or broaden as the transition metal ion concentration approaches and increases beyond a critical value. In addition a Raman continuum, that overlaps with the optical phonon, is observed to develop when the PL features are modified. In the corresponding Zn1−xCoxSe samples the optical phonons acquire a characteristic Fano line shape suggestive of its coupling to the Raman continuum. It is proposed that these changes to the optical transitions arise from the enhancement of an effective p–d hybridization between low-lying d levels and band electrons with increasing x—an effect largely due to the proximity of the Co2+ and Fe2+ crystal field ground levels to the valence band maximum.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.355594

    Articles: DFG German National Licenses
  13. 13
    Herberholz, R. ; Walter, T. ; Müller, C. ; Friedlmeier, T. ; Schock, H. W. ; Saad, M. ; Lux-Steiner, M. Ch. ; Alberts, V.

    Woodbury, NY : American Institute of Physics (AIP)
    Published 1996
    Staff View
    ISSN:
    1077-3118
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    Admittance spectroscopy was measured on Cu(In,Ga)(S,Se)2 thin film and single crystal heterojunctions. The emission rates of defects for various near-stoichiometric compositions follow a Meyer–Neldel rule, showing increasing attempt-to-escape frequencies with increasing defect depth. Defects in highly (In,Ga)-rich material showed lower attempt-to-escape frequencies and follow a separate Meyer–Neldel relation. Repetitive air annealing of a CuInSe2 heterojunction revealed a shift of the depth and capture cross section of an observed defect. © 1996 American Institute of Physics.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.117352

    Articles: DFG German National Licenses
  14. 14
    Bauknecht, A. ; Siebentritt, S. ; Albert, J. ; Lux-Steiner, M. Ch.

    [S.l.] : American Institute of Physics (AIP)
    Published 2001
    Staff View
    ISSN:
    1089-7550
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    A detailed analysis of the radiative recombination processes in CuxGaySe2 epitaxial layers is presented aiming at an investigation of the intrinsic defect levels as a function of chemical composition. CuxGaySe2 is grown by metalorganic vapor phase epitaxy to allow a precise control of composition. Temperature and excitation intensity dependent photoluminescence is used to identify different recombination mechanisms and to determine the ionization energies of the defect levels involved. Defect-correlated optical transitions in Cu-rich epilayers are described in a recombination model consisting of two acceptor and one donor levels showing ionization energies of (60±10) meV, (100±10) meV, and (12±5) meV, respectively. The identification of a shallow compensating donor in CuxGaySe2 and the assignment of the 100 meV state to an acceptor are the most important new aspects in this model. Photoluminescence properties of layers showing Ga-rich compositions are discussed in a model of highly doped and highly compensated semiconductors—the model of fluctuating potentials. © 2001 American Institute of Physics.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.1357786

    Articles: DFG German National Licenses
  15. 15
    Kimmel, M. ; Lux-Steiner, M. ; Vögt, M. ; Bucher, E.

    [S.l.] : American Institute of Physics (AIP)
    Published 1988
    Staff View
    ISSN:
    1089-7550
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    Heterojunction solar cells were prepared by magnetron sputtering of n-ZnO onto p-CdSiAs2 single crystals. These crystals were grown by chemical vapor-phase transport and have a resistivity of 2 Ω cm, a Hall mobility of 300 cm2/V s, and a net carrier density of 1016 cm−3 at room temperature. The heterojunctions exhibit short-circuit current densities up to 12 mA/cm2 and open-circuit voltages between 180 and 250 mV with power conversion efficiencies up to 1% under 72 mW/cm2 halogen lamp illumination. Open-circuit voltage values could be increased by heat treatment at 80 °C for 15 min in an argon atmosphere. By measuring the reflection and the quantum yield versus wavelength the efficiency losses in the short-wavelength region could be attributed to the corresponding high reflection.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.341835

    Articles: DFG German National Licenses
  16. 16
    Steiner, M. ; Kakurai, K. ; Kjems, J. K. ; Petitgrand, D. ; Pynn, R.

    [S.l.] : American Institute of Physics (AIP)
    Published 1987
    Staff View
    ISSN:
    1089-7550
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    Our studies of the spin dynamics for two near-Heisenberg antiferromagnets (AFMs) revealed: In CsNiCl3 (S=1) at low T(very-much-less-than)TN we confirm the conclusions given earlier, but disagreement with the spin-wave calculations used is found for the eigenvectors. For T〉TN, the most important result is the observation that all 〈SαSα〉 (α=x,y,z) are identical, demanding another interpretation for the gap observed than the easy axis one. In CsVCl3 (S= (3)/(2) ) we could not observe any inconsistency in the microscopic parameters determined above and below TN. Although there is a striking coincidence with Haldane's conjecture [unexplained gap for S=1 (CsNiCl3), no such gap for S= (3)/(2) (CsVCl3)], it is not clear whether this can be considered a proof for Haldane's conjecture.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.338595

    Articles: DFG German National Licenses
  17. 17
    Kopinga, K. ; de Gronckel, H. A. M. ; de Vries, G. C. ; Frikkee, E. ; Kakurai, K. ; Steiner, M.

    [S.l.] : American Institute of Physics (AIP)
    Published 1987
    Staff View
    ISSN:
    1089-7550
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    The magnetic properties of the title compound have been studied by measurements of the nuclear spin-lattice relaxation time T1, the uniform magnetization M, and by quasielastic and inelastic neutron scattering. The field and temperature dependence of T1 and the wave-number dependence of the magnon excitation energy can be satisfactorily described by linear spin-wave theory. A good description of M, however, requires a contribution from kink solitons. The available evidence suggests that, in contrast to the linear excitations, the nonlinear excitations in CHAB for B(parallel)c can be described very well by a classical model, which is consistent with the interpretation of earlier heat-capacity measurements.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.338596

    Articles: DFG German National Licenses
  18. 18
    Jäger-Waldau, R. ; Stücheli, N. ; Braun, M. ; Lux Steiner, M. ; Bucher, E. ; Tenne, R. ; Flaisher, H. ; Kerfin, W. ; Braun, R. ; Koschel, W.

    [S.l.] : American Institute of Physics (AIP)
    Published 1988
    Staff View
    ISSN:
    1089-7550
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    The electronic properties of thin CdSe films prepared through physical vapor transport were investigated using photoluminescence (PL) and electronic measurements. The films were studied at each of the main preparation steps, i.e., evaporation, annealing, etching, and finally photoetching. At 3 K two distinct donor-acceptor (DA) transitions at 1.75 and 1.70 eV were found in the photoluminescence spectra in addition to deep states at about 1.55 eV at 20 K. These DA transitions which are produced mainly during the evaporation might be associated with group VII and with alkali metal impurities. After each preparation step the DA transitions change their intensities. It is shown that photoetching of the films leads to a removal of the deep centers, while the 1.75 eV transition is blue shifted. In contrast with single-crystal CdSe the intensity of the PL increases after photoetching. The results of the PL are consistent with the electronic measurements. They are explained in terms of a previously published model.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.341649

    Articles: DFG German National Licenses
  19. 19
    STEINER, M. ; HASKETT, R. F. ; CARROLL, B. J. ; HAYS, S. E. ; RUBIN, R. T.

    Oxford, UK : Blackwell Publishing Ltd
    Published 1984
    Staff View
    ISSN:
    1471-0528
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Medicine
    Notes:
    The circadian secretory profiles of serum prolactin, growth hormone and cortisol were measured in two women suffering from severe premenstrual tension syndrome and in two asymptomatic control subjects. Subjects and controls were screened and included after a rigorous selection process. Blood samples were obtained every 30 min over a period of 24 h in each woman both on day 9 (follicular phase) and day 26 (luteal phase) of the menstrual cycle. There was no relationship between the hormonal secretory profiles and the premenstrual tension syndrome.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1111/j.1471-0528.1984.tb04785.x

    Articles: DFG German National Licenses
  20. 20
    Sommerhalter, Ch. ; Matthes, Th. W. ; Glatzel, Th. ; Jäger-Waldau, A. ; Lux-Steiner, M. Ch.

    Woodbury, NY : American Institute of Physics (AIP)
    Published 1999
    Staff View
    ISSN:
    1077-3118
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    We present quantitative measurements of the work function of semiconductor and metal surfaces prepared in ultrahigh vacuum (UHV) using a combination of UHV noncontact atomic force microscopy and Kelvin probe force microscopy. High energetic and lateral resolution is achieved by using the second resonance frequency of the cantilever to measure the electrostatic forces, while the first resonance frequency is used to simultaneously obtain topographic images by the frequency modulation technique. Spatially resolved work-function measurements reveal a reduced work function in the vicinity of steps on highly oriented pyrolytic graphite. On the GaAs(110) surface it could be demonstrated that defect states in the forbidden band gap cause a local pinning of the Fermi level along monolayer steps. On p-WSe2(0001) work-function variations due to the Coulomb potential of single dopant sites were resolved. © 1999 American Institute of Physics.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.124357

    Articles: DFG German National Licenses