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

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  1. 1
    Staff View
    Publication Date:
    2018-05-30
    Publisher:
    American Physical Society (APS)
    Print ISSN:
    1050-2947
    Electronic ISSN:
    1094-1622
    Topics:
    Physics
    Keywords:
    Atomic and molecular processes in external fields, including interactions with strong fields and short pulses
    Published by:
    http://www.aps.org/

    Latest Papers from Table of Contents or Articles in Press
  2. 2
    Staff View
    Publication Date:
    2018-01-17
    Publisher:
    Nature Publishing Group (NPG)
    Electronic ISSN:
    2041-1723
    Topics:
    Biology
    Chemistry and Pharmacology
    Natural Sciences in General
    Physics
    Published by:
    http://www.nature.com/

    Latest Papers from Table of Contents or Articles in Press
  3. 3
    Staff View
    Publication Date:
    2018-09-05
    Publisher:
    National Academy of Sciences
    Print ISSN:
    0027-8424
    Electronic ISSN:
    1091-6490
    Topics:
    Biology
    Medicine
    Natural Sciences in General
    Published by:
    http://www.nasonline.org/

    Latest Papers from Table of Contents or Articles in Press
  4. 4
    Staff View
    Publication Date:
    2012-10-16
    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:
    Animals ; *Biodiversity ; *Birds ; *Capital Financing ; Conservation of Natural Resources/*economics ; Costs and Cost Analysis ; *Extinction, Biological ; Humans
    Published by:
    http://www.aaas.org/

    Latest Papers from Table of Contents or Articles in Press
  5. 5
    Staff View
    Publication Date:
    2013-01-19
    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:
    Animals ; *Biodiversity ; *Birds ; *Capital Financing ; Conservation of Natural Resources/*economics ; *Extinction, Biological ; Humans
    Published by:
    http://www.aaas.org/

    Latest Papers from Table of Contents or Articles in Press
  6. 6
    Staff View
    Publication Date:
    2014-07-12
    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:
    Amino Acid Sequence ; Consensus Sequence ; DNA Mutational Analysis ; Disease Transmission, Infectious/statistics & numerical data ; Female ; HIV Infections/*transmission ; HIV-1/*genetics ; *Heterosexuality ; High-Throughput Nucleotide Sequencing ; Human Immunodeficiency Virus Proteins/genetics ; Humans ; Male ; Models, Statistical ; Molecular Sequence Data ; Point Mutation ; Risk Factors ; *Selection, Genetic ; Viral Load
    Published by:
    http://www.aaas.org/

    Latest Papers from Table of Contents or Articles in Press
  7. 7
    J. S. Johnson ; M. J. Bentley ; J. A. Smith ; R. C. Finkel ; D. H. Rood ; K. Gohl ; G. Balco ; R. D. Larter ; J. M. Schaefer
    American Association for the Advancement of Science (AAAS)
    Published 2014
    Staff View
    Publication Date:
    2014-02-22
    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:
    Beryllium/analysis ; *Ice Cover ; *Islands ; Motion ; Radioisotopes/analysis
    Published by:
    http://www.aaas.org/

    Latest Papers from Table of Contents or Articles in Press
  8. 8
    Staff View
    Publication Date:
    2018-11-09
    Publisher:
    American Physical Society (APS)
    Print ISSN:
    0556-2821
    Electronic ISSN:
    1089-4918
    Topics:
    Physics
    Keywords:
    Cosmology
    Published by:
    http://www.aps.org/

    Latest Papers from Table of Contents or Articles in Press
  9. 9
    Staff View
    Publication Date:
    2018-10-05
    Publisher:
    Genetics Society of America (GSA)
    Print ISSN:
    0016-6731
    Topics:
    Biology
    Published by:
    http://www.genetics-gsa.org/

    Latest Papers from Table of Contents or Articles in Press
  10. 10
    Staff View
    Publication Date:
    2018-02-06
    Publisher:
    Wiley-Blackwell
    Print ISSN:
    0094-8276
    Electronic ISSN:
    1944-8007
    Topics:
    Geosciences
    Physics
    Published by:
    http://www.wiley.com/wiley-blackwell

    Latest Papers from Table of Contents or Articles in Press
  11. 11
    Staff View
    Publication Date:
    2018-11-16
    Publisher:
    The American Association for Cancer Research (AACR)
    Print ISSN:
    1078-0432
    Electronic ISSN:
    1557-3265
    Topics:
    Medicine
    Published by:
    http://www.aacr.org/

    Latest Papers from Table of Contents or Articles in Press
  12. 12
    Staff View
    Publication Date:
    2015-12-15
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Published by:
    http://www.nature.com/

    Latest Papers from Table of Contents or Articles in Press
  13. 13
    Staff View
    Publication Date:
    2011-06-24
    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:
    Animal Identification Systems ; Animal Migration ; Animals ; Aquatic Organisms/*physiology ; Bayes Theorem ; Biodiversity ; California ; Climate ; *Ecosystem ; Locomotion/*physiology ; North America ; Pacific Ocean ; Population Dynamics ; Predatory Behavior/*physiology ; Seasons ; Species Specificity ; Water Movements ; Wilderness
    Published by:
    http://www.nature.com/

    Latest Papers from Table of Contents or Articles in Press
  14. 14
    Staff View
    Type of Medium:
    article
    Publication Date:
    1982
    Keywords:
    Geschichte (Histor) ; Quantentheorie
    In:
    Zur Didaktik der Physik und Chemie, Bd. Tagung 1981 (1982) S. 226-228, 0170-5983
    Language:
    German

    FIS Bildung Literaturdatenbank
  15. 15
    Staff View
    Type of Medium:
    article
    Publication Date:
    1981
    Keywords:
    Geschichte (Histor) ; Quantentheorie
    In:
    Zur Didaktik der Physik und Chemie, Bd. Tagung 1980 (1981) S. 226-228, 0170-5983
    Language:
    German

    FIS Bildung Literaturdatenbank
  16. 16
    Schaefer, M., Morinaga, G., Matsui, A., Schänzle, G., Bischoff, D., Süssmuth, R. D.
    The American Society for Pharmacology and Experimental Therapeutics (ASPET)
    Published 2018
    Staff View
    Publication Date:
    2018-01-20
    Publisher:
    The American Society for Pharmacology and Experimental Therapeutics (ASPET)
    Print ISSN:
    0090-9556
    Electronic ISSN:
    1521-009X
    Topics:
    Chemistry and Pharmacology
    Medicine
    Published by:
    http://www.aspet.org/

    Latest Papers from Table of Contents or Articles in Press
  17. 17
    Ankner, J. F. ; Kaiser, H. ; Hamacher, K. ; Schreyer, A. ; Zeidler, Th. ; Zabel, H. ; Majkrzak, C. F. ; Schäfer, M. ; Grünberg, P.

    [S.l.] : American Institute of Physics (AIP)
    Published 1996
    Staff View
    ISSN:
    1089-7550
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    Utilizing the magneto-optic Kerr effect (MOKE) in conjunction with x-ray and neutron reflectometry (NR) and diffraction, we have studied the magnetic coupling of Fe/Cr(001) superlattices grown at room temperature and 250 °C. Only the samples grown at elevated temperature exhibit noncollinear coupling of 5.0 nm Fe layers across 1.7 nm Cr interlayers. The noncollinear samples feature a less-disordered in-plane interfacial structure than those grown at room temperature. Using x-ray diffuse reflectivity, we have measured a length scale of 10 nm for these in-plane features. We have also observed, via NR, a remanent noncollinear coupling angle of 50° and, via MOKE and NR, a gradual approach to saturation at upwards of 7 kOe. These features can be explained qualitatively by the proximity magnetism model of Slonczewski. We will compare the predictions of both the proximity and bilinear/biquadratic models with our data and present the results of ongoing neutron measurements of the temperature dependence of the coupling. © 1996 American Institute of Physics.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.361670

    Articles: DFG German National Licenses
  18. 18
    Schäfer, M. ; Demokritov, S. ; Müller-Pfeiffer, S. ; Schäfer, R. ; Schneider, M. ; Grünberg, P. ; Zinn, W.

    [S.l.] : American Institute of Physics (AIP)
    Published 1995
    Staff View
    ISSN:
    1089-7550
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    Results are outlined of experimental work concerning Slonczewski's theories explaining 90° coupling: "loose spin'' theory and thickness-fluctuation mechanism. The loose spin theory suggests that 90° coupling originates from paramagnetic impurities in the interlayer of an exchange-coupled layered structure. The influence of these paramagnetic impurities on the magnetic exchange coupling was studied using the wedge technique. High-quality single-crystalline Fe/Ag/Fe samples were prepared in UHV and each sample consisted of two wedges: one wedge with additional Fe deliberately inserted during growth into the Ag interlayer and one wedge with a pure Fe/Ag/Fe structure. The detailed analysis of magneto-optic hysteresis loops revealed quantitatively the bilinearly and the 90° coupling strength. As predicted by loose spin theory additional Fe in the Ag spacer lead to a strong temperature dependence of the 90° coupling. According to the theory an increase of 90° coupling strength proportional to impurity concentration was detected while the strength of bilinear coupling decreased. For the pure Fe/Ag/Fe structure, a linear increase of the 90° coupling strength with decreasing temperature was observed. This result can be explained within the fluctuation mechanism which creates 90° coupling through a combination of interface roughness and intralayer ferromagnetic exchange. © 1995 American Institute of Physics.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.359117

    Articles: DFG German National Licenses
  19. 19
    Staff View
    ISSN:
    1089-7550
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    Sensitivity to magnetic atoms and low intrinsic absorption characterize the interaction of neutrons with matter. Consequently, polarized neutron reflectivity provides a unique means of performing depth-resolved vector magnetometry. We have used this technique to determine the magnetization depth profiles of Fe/Cr superlattices. Superlattices of bilayer composition [55 A(ring) Fe/17 A(ring) Cr], grown at 523 K, exhibit biquadratic coupling with large saturation fields (∼3 kOe), while those grown at 293 K are ferromagnetically ordered. We have directly measured the evolution of the coupling angle between adjacent Fe layers as a function of applied field and will discuss how bilinear, biquadratic, and external field terms produce the observed order. The weaker coupling found in the Fe/Al system makes possible the investigation of a range of spin configurations at temperatures that do not endanger the sample. We have mapped the phase diagram of a [42 A(ring) Fe/12 A(ring) Al/39 A(ring) Fe] (100) trilayer and find evidence of biquadratic coupling at low temperatures and fields (e.g., when H=180 Oe, the Fe layer spins relax away from ferromagnetic alignment below T≈170 K). Our measurements agree qualitatively with energy minimization calculations and the results of bulk magnetometry.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.358038

    Articles: DFG German National Licenses
  20. 20
    Schad, R. ; Potter, C. D. ; Beliën, P. ; Verbanck, G. ; Moshchalkov, V. V. ; Bruynseraede, Y. ; Schäfer, M. ; Schäfer, R. ; Grünberg, P.

    [S.l.] : American Institute of Physics (AIP)
    Published 1994
    Staff View
    ISSN:
    1089-7550
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    The 2-ML (monolayer) oscillation period has been observed in the magnetization as well as in the magnetoresistance of Fe/Cr/Fe trilayers. Kerr effect measurements were performed in order to verify the periodicity and determine the kind of the coupling between the Fe layers. The magnetoresistance loops show characteristic steps at magnetic field values at which the size of the magnetization changes.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.358207

    Articles: DFG German National Licenses