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  1. Article ; Online: New type of magnetic structure in the R

    Maskova-Cerna, Silvie / Klicpera, Milan / Svoboda, Pavel / Andreev, Alexander V / Skourski, Yurii / Reehuis, Manfred / Hoffmann, Jens-Uwe / André, Gilles / Havela, Ladislav

    Journal of physics. Condensed matter : an Institute of Physics journal

    2020  Volume 32, Issue 34, Page(s) 345801

    Abstract: Anisotropy of bulk magnetic properties and magnetic structure studies of a ... ...

    Abstract Anisotropy of bulk magnetic properties and magnetic structure studies of a Tb
    Language English
    Publishing date 2020-03-27
    Publishing country England
    Document type Journal Article
    ZDB-ID 1472968-4
    ISSN 1361-648X ; 0953-8984
    ISSN (online) 1361-648X
    ISSN 0953-8984
    DOI 10.1088/1361-648X/ab8428
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Book: Erneuerung des Flat-Cone-Diffraktometers am Forschungsreaktor BERII/HMI Berlin (HMI) durch den Einbau von zweidimensionalen Detektoren

    Hoffmann, Jens-Uwe / Ihringer, Jörg

    Schlussbericht ; 1.4.2004 bis 30.6.2007

    2007  

    Institution Universität Tübingen
    Author's details Zuwendungsempfänger: Universität Tübingen. Projektleitung: Jörg Ihringer; zsgest. von Jens-Uwe Hoffmann
    Language German
    Size 29 Bl., Ill., graph. Darst.
    Publishing place Tübingen
    Document type Book
    Note Förderkennzeichen BMBF 03IH6TUE ; Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  3. Book ; Online: Erneuerung des Flat-Cone-Diffraktometers am Forschungsreaktor BERII/HMI Berlin (HMI) durch den Einbau von zweidimensionalen Detektoren

    Hoffmann, Jens-Uwe / Ihringer, Jörg

    Schlussbericht ; 1.4.2004 bis 30.6.2007

    2007  

    Institution Universität Tübingen
    Author's details Zuwendungsempfänger: Universität Tübingen. Projektleitung: Jörg Ihringer; zsgest. von Jens-Uwe Hoffmann
    Language German
    Size Online-Ressource (29 S., 5,55 MB), Ill., graph. Darst.
    Publisher Technische Informationsbibliothek u. Universitätsbibliothek
    Publishing place Hannover ; Tübingen
    Document type Book ; Online
    Note Förderkennzeichen BMBF 03IH6TUE ; Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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    Inter-library loan at ZB MED

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  4. Article: Comparative Microstructural Analysis of Nongraphitic Carbons by Wide-Angle X-ray and Neutron Scattering

    Pfaff, Torben / Badaczewski, Felix M / Loeh, Marc O / Franz, Alexandra / Hoffmann, Jens-Uwe / Reehuis, Manfred / Zeier, Wolfgang G / Smarsly, Bernd M

    Journal of physical chemistry. 2019 July 09, v. 123, no. 33

    2019  

    Abstract: Non-graphitic carbons (NGCs) represent the most abundant class of sp2-hybridized carbon, materials (coal char coal, activated carbon, etc.). These carbons consist of small graphene layer stacks possessing significant structural disorder in both the ... ...

    Abstract Non-graphitic carbons (NGCs) represent the most abundant class of sp2-hybridized carbon, materials (coal char coal, activated carbon, etc.). These carbons consist of small graphene layer stacks possessing significant structural disorder in both the single graphene sheets and the stacking. In this study an advanced evaluation approach for wide-angle neutron scattering (WANS) was developed, based on the method introduced by Ruland and Smarsly in 2002. In particular, we elucidated if and how the enhanced WANS data quality and larger values of the modulus of the scattering vector s-range affect the accuracy and the values of the size and disorder parameters—being fitting parameters by themselves—in comparison to wide-angle X-ray scattering (WAXS), which is usually performed by laboratory equipment. We find a reasonable agreement for the parameters La and Lc, that is, the lateral dimension and stack height, within the error bars, whereas for the disorder parameters different results for WAXS and WANS were found, the origin of which is discussed. Thus, this study addresses the general issue of how reliably microstructural parameters can be determined from WAXS/WANS by fitting simulated WAXS and WANS curves, which are quality-impaired by added Gaussian noise at different levels and cut-off at different s-values. From this analysis, we estimated the minimal data quality required for a reliable NGC microstructural analysis based on WAXS/WANS. As an important finding, these simulations show that typical, standard WAXS laboratory setups are sufficient to provide reliable values for the most relevant structural parameters. Furthermore, pair-distribution function (PDF) analyses were performed on WAXS data obtained from a synchrotron facility. Comparing PDF and WAXS/WANS fitting analysis suggests the presence of small highly ordered oligoaromatic domains embedded in the larger graphene sheets, questioning the classical view on the NGC microstructure.
    Keywords activated carbon ; coal ; data quality ; graphene ; laboratory equipment ; microstructure ; neutron diffraction ; wide-angle X-ray scattering
    Language English
    Dates of publication 2019-0709
    Size p. 20532-20546.
    Publishing place American Chemical Society
    Document type Article
    ISSN 1932-7455
    DOI 10.1021/acs.jpcc.9b03590
    Database NAL-Catalogue (AGRICOLA)

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  5. Book ; Online ; Thesis: Magnetische Korrelationen und Phasenübergänge in magnetoresistiven La1-xSrxMnO3-Einkristallen

    Hoffmann, Jens-Uwe

    2002  

    Author's details vorgelegt von Jens-Uwe Hoffmann
    Keywords Strontiumverbindungen ; Manganate ; Magnetostriktion ; Lanthanverbindungen ; Neutronenstreuung ; Einkristall
    Language German
    Size Online-Ressource
    Document type Book ; Online ; Thesis
    Thesis / German Habilitation thesis Univ., Diss--Tübingen, 2002
    Database Former special subject collection: coastal and deep sea fishing

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  6. Article: The NeXus data format.

    Könnecke, Mark / Akeroyd, Frederick A / Bernstein, Herbert J / Brewster, Aaron S / Campbell, Stuart I / Clausen, Björn / Cottrell, Stephen / Hoffmann, Jens Uwe / Jemian, Pete R / Männicke, David / Osborn, Raymond / Peterson, Peter F / Richter, Tobias / Suzuki, Jiro / Watts, Benjamin / Wintersberger, Eugen / Wuttke, Joachim

    Journal of applied crystallography

    2015  Volume 48, Issue Pt 1, Page(s) 301–305

    Abstract: NeXus is an effort by an international group of scientists to define a common data exchange and archival format for neutron, X-ray and muon experiments. NeXus is built on top of the scientific data format HDF5 and adds domain-specific rules for ... ...

    Abstract NeXus is an effort by an international group of scientists to define a common data exchange and archival format for neutron, X-ray and muon experiments. NeXus is built on top of the scientific data format HDF5 and adds domain-specific rules for organizing data within HDF5 files, in addition to a dictionary of well defined domain-specific field names. The NeXus data format has two purposes. First, it defines a format that can serve as a container for all relevant data associated with a beamline. This is a very important use case. Second, it defines standards in the form of application definitions for the exchange of data between applications. NeXus provides structures for raw experimental data as well as for processed data.
    Language English
    Publishing date 2015-01-30
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2020879-0
    ISSN 1600-5767 ; 0021-8898
    ISSN (online) 1600-5767
    ISSN 0021-8898
    DOI 10.1107/S1600576714027575
    Database MEDical Literature Analysis and Retrieval System OnLINE

    Full text online

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