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Fakultät für Physik, Experimentalphysik
Anschrift
Duisburg
Raum
MD 450

Funktionen

  • Gleichstellungsbeauftragte, Physik
  • Gruppe der akademischen Mitarbeiterinnen und Mitarbeiter, Studienbeirat
  • Wissenschaftliche/r Mitarbeiter/in, Arbeitsgruppe Prof. Wende

Die folgenden Publikationen sind in der Online-Universitätsbibliographie der Universität Duisburg-Essen verzeichnet. Weitere Informationen finden Sie gegebenenfalls auch auf den persönlichen Webseiten der Person.

    Artikel in Zeitschriften

  • Terwey, Alexandra; Gruner, Markus Ernst; Keune, Werner; Landers, Joachim; Salamon, Soma; Eggert, Benedikt; Ollefs, Katharina; Brabänder, V.; Radulov, Iliya; Skokov, Konstantin; Faske, Tom; Hu, Michael Y.; Zhao, Jiyong; Alp, Esen E.; Giacobbe, Carlotta; Gutfleisch, Oliver; Wende, Heiko
    Influence of hydrogenation on the vibrational density of states of magnetocaloric LaFe11.4Si1.6H1.6
    In: Physical Review B Jg. 101 (2020) Nr. 6, S. 064415
    ISSN: 2469-9969; 2469-9950
  • Eggert, Benedikt; Gruner, Markus; Ollefs, Katharina; Schuster, Ellen; Rothenbach, Nico; Hu, Michael Y.; Zhao, Jiyong; Toellner, Thomas S.; Sturhahn, Wolfgang; Pentcheva, Rossitzza; Cuenya, Beatriz Roldan; Alp, Esen E.; Wende, Heiko; Keune, Werner
    Interface-related magnetic and vibrational properties in Fe/MgO heterostructures from nuclear resonant spectroscopy and first-principles calculations
    In: Physical Review Materials Jg. 4 (2020) Nr. 4, S. 044402
    ISSN: 2475-9953
  • Witte, Ralf; Sarkar, Abhishek; Velasco, Leonardo; Kruk, Robert; Brand, Richard A.; Eggert, Benedikt; Ollefs, Katharina; Weschke, Eugen; Wende, Heiko; Hahn, Horst
    Magnetic properties of rare-earth and transition metal based perovskite type high entropy oxides
    In: Journal of Applied Physics Jg. 127 (2020) Nr. 18, S. 185109
    ISSN: 0021-8979; 1089-7550
  • Eggert, Benedikt; Schmeink, Alexander; Lill, Johanna; Liedke, Maciej Oskar; Kentsch, Ulrich; Butterling, Maik; Wagner, Andreas; Pascarelli, Sakura; Potzger, Kay; Lindner, Jürgen; Thomson, Thomas; Fassbender, Jürgen; Ollefs, Katharina; Keune, Werner; Bali, Rantej; Wende, Heiko
    Magnetic response of FeRh to static and dynamic disorder
    In: RSC Advances Jg. 10 (2020) Nr. 24, S. 14386 - 14395
    ISSN: 2046-2069
  • Pile, Santa; Feggeler, Thomas; Schaffers, Taddäus; Meckenstock, Ralf; Buchner, Martin; Spoddig, Detlef; Zingsem, Benjamin; Ney, Verena; Farle, Michael; Wende, Heiko; Ohldag, Hendrik; Ney, Andreas; Ollefs, Katharina
    Non-standing spin-waves in confined micrometer-sized ferromagnetic structures under uniform excitation
    In: Applied Physics Letters (APL) Jg. 116 (2020) Nr. 7, S. 072401
    ISSN: 0003-6951; 1077-3118
  • Sarkar, Abhishek; Eggert, Benedikt; Velasco, Leonardo; Mu, Xiaoke; Lill, Johanna; Ollefs, Katharina; Bhattacharya, Subramshu S.; Wende, Heiko; Kruk, Robert; Brand, Richard A.; Hahn, Horst
    Role of intermediate 4f states in tuning the band structure of high entropy oxides
    In: APL Materials Jg. 8 (2020) Nr. 5, S. 051111
    ISSN: 2166-532X
  • Huttmann, Felix; Rothenbach, Nico; Kraus, Stefan; Ollefs, Katharina; Arruda, Lucas M.; Bernien, Matthias; Thonig, Danny; Delin, Anna; Fransson, Jonas; Kummer, Kurt; Brookes, Nicholas B.; Eriksson, Olle; Kuch, Wolfgang; Michely, Thomas; Wende, Heiko
    Europium Cyclooctatetraene Nanowire Carpets : A Low-Dimensional, Organometallic, and Ferromagnetic Insulator
    In: The Journal of Physical Chemistry Letters Jg. 10 (2019) S. 911 - 917
    ISSN: 1948-7185
  • Schaffers, Taddäus; Feggeler, Thomas; Pile, Santa; Meckenstock, Ralf; Buchner, Martin; Spoddig, Detlef; Ney, Verena; Farle, Michael; Wende, Heiko; Wintz, Sebastian; Weigand, Markus; Ohldag, Hendrik; Ollefs, Katharina; Ney, Andreas
    Extracting the dynamic magnetic contrast in time-resolved X-ray transmission microscopy
    In: Nanomaterials Jg. 9 (2019) Nr. 7, S. 940
    ISSN: 2079-4991
  • Rothenbach, Nico; Gruner, Markus Ernst; Ollefs, Katharina; Schmitz-Antoniak, Carolin; Salamon, Soma; Zhou, Ping; Li, R.; Mo, Mianzhen; Park, S.; Shen, Xiaozhe; Weathersby, Stephen P.; Yang, Jie; Wang, Xijie; Pentcheva, Rossitza; Wende, Heiko; Bovensiepen, Uwe; Sokolowski-Tinten, Klaus; Eschenlohr, Andrea
    Microscopic nonequilibrium energy transfer dynamics in a photoexcited metal/insulator heterostructure
    In: Physical Review B Jg. 100 (2019) Nr. 17, S. 174301
    ISSN: 2469-9969; 2469-9950
  • Scheibel, Franziska; Gottschall, Tino; Taubel, Andreas; Fries, Maximilian; Skokov, Konstantin P.; Terwey, Alexandra; Keune, Werner; Ollefs, Katharina; Wende, Heiko; Farle, Michael; Acet, Mehmet; Gutfleisch, Oliver; Gruner, Markus Ernst
    Hysteresis Design of Magnetocaloric Materials—From Basic Mechanisms to Applications
    In: Energy Technology Jg. 6 (2018) Nr. 8, S. 1397 - 1428
    ISSN: 2194-4288; 2194-4296
  • La Torre, Enrico; Smekhova, Alevtina; Schmitz-Antoniak, Carolin; Ollefs, Katharina; Eggert, Benedikt; Cöster, Birte; Walecki, Dirk; Wilhelm, Fabrice; Rogalev, Andrei; Lindner, Jürgen; Bali, Rantej; Banerjee, Rudra; Sanyal, Biplab; Wende, Heiko
    Local probe of irradiation-induced structural changes and orbital magnetism in Fe60Al40 thin films via an order-disorder phase transition
    In: Physical Review B Jg. 98 (2018) Nr. 2, S. 024101
    ISSN: 2469-9969; 2469-9950
  • Maurizio, Chiara; Michieli, Niccolò; Kalinic, Boris; Mattarello, Valentina; Bello, Valentina; Wilhelm, F.; Ollefs, Katharina; Mattei, Giovanni
    Local structure and X-ray magnetic circular dichroism of Au in Au-Co nanoalloys
    In: Applied Surface Science Jg. 433 (2018) S. 596 - 601
    ISSN: 0169-4332; 1873-5584
  • Schleicher, B; Klar, David; Ollefs, Katharina; Diestel, A; Walecki, Dirk; Weschke, E; Schultz, L; Nielsch, K; Fähler, S; Wende, Heiko; Gruner, Markus Ernst
    Electronic structure and magnetism of epitaxial Ni–Mn–Ga(-Co) thin films with partial disorder : a view across the phase transition
    In: Journal of Physics D: Applied Physics Jg. 50 (2017) Nr. 46, S. 465005
    ISSN: 0022-3727; 1361-6463
  • Wawro, A.; Kurant, Z.; Tekielak, M.; Nawrocki, P.; Milińska, E.; Pietruczik, A.; Wójcik, M.; Mazalski, P.; Kanak, J.; Ollefs, Katharina; Wilhelm, F.; Rogalev, A.; Maziewski, A.
    Engineering the magnetic anisotropy of an ultrathin Co layer sandwiched between films of Mo or Au
    In: Journal of physics: D, applied physics Jg. 50 (2017) Nr. 21, art. no. 215004
    ISSN: 0022-3727; 1361-6463
  • Henne, Bastian; Ney, Verena; Lumetzberger, Julia; Ollefs, Katharina; Wilhelm, Fabrice; Rogalev, Andrei; Ney, Andreas
    Local structure and magnetism of Co3+ in wurtzite Co : ZnO
    In: Physical Review B Jg. 95 (2017) Nr. 5, S. 054406
    ISSN: 2469-9969; 2469-9950
  • Schaffers, Taddäus; Meckenstock, Ralf; Spoddig, Detlef; Feggeler, Thomas; Ollefs, Katharina; Schöppner, Christian; Bonetti, Stefano; Ohldag, Hendrik; Farle, Michael; Ney, Andreas
    The combination of micro-resonators with spatially resolved ferromagnetic resonance
    In: Review of Scientific Instruments Jg. 88 (2017) Nr. 9,
    ISSN: 1089-7623; 0034-6748
  • Pedersen, Kasper S.; Woodruff, Daniel N.; Singh, Saurabh Kumar; Tressaud, Alain; Durand, Etienne; Atanasov, Mihail; Perlepe, Panagiota; Ollefs, Katharina; Wilhelm, Fabrice; Mathonière, Corine; Neese, Frank; Rogalev, Andrei; Bendix, Jesper; Clérac, Rodolphe
    [OsF6]x− : Molecular Models for Spin-Orbit Entangled Phenomena
    In: Chemistry: A European Journal Jg. 23 (2017) Nr. 47, S. 11244 - 11248
    ISSN: 0947-6539; 1521-3765
  • Ney, V.; Rogalev, A.; Wilhelm, F.; Ollefs, Katharina; Henne, B.; Venkataraman, V.
    Co and Cu co-doped ZnO epitaxial films : a magnetically soft nano-composite
    In: Journal of Applied Physics Jg. 119 (2016) Nr. 16, S. 163901
    ISSN: 0021-8979; 1089-7550
  • Pedersen, K.; Bendix, J.; Tressaud, A.; Durand, E.; Weihe, H.; Salman, Z.; Morsing, T.; Woodruff, D.; Lan, Y.; Wernsdorfer, W.; Mathoniere, C.; Piligkos, S.; Klokishner, S.; Ostrovsky, S.; Ollefs, Katharina; Wilhelm, F.; Rogalev, A.; Clerac, R.
    Iridates from the molecular side
    In: Nature Communications Jg. 7 (2016) S. 12195
    ISSN: 2041-1723
  • Ganzhorn, K.; Barker, J.; Schlitz, R:; Piot, B.; Ollefs, Katharina; Guillou, F.; Wilhelm, F.; Rogalev, A.; Opel, M.; Althammer, M.; Geprags, S.; Huebl, H.; Gross, R.; Bauer, G.; Goennenwein, S.
    Spin Hall magnetoresistance in a canted ferrimagnet
    In: Physical Review B Jg. 94 (2016) Nr. 9, S. 094401
    ISSN: 2469-9969; 2469-9950
  • Caminale, M.; Ghosh, A.; Auffret, S.; Ebels, U.; Ollefs, Katharina; Wilhelm, F.; Rogalev, A.; Bailey, W.
    Spin pumping damping and magnetic proximity effect in Pd and Pt spin-sink layers
    In: Physical Review B Jg. 94 (2016) Nr. 1, S. 014414
    ISSN: 2469-9969; 2469-9950
  • Juhin, Amélie; Sainctavit, Philippe; Ollefs, Katharina; Sikora, Marcin; Filipponi, Adriano; Glatzel, Pieter; Wilhelm, Fabrice; Rogalev, Andrei
    X-ray magnetic circular dichroism measured at the Fe K-edge with a reduced intrinsic broadening : X-ray absorption spectroscopy versus resonant inelastic x-ray scattering measurements
    In: Journal of Physics: Condensed Matter Jg. 28 (2016) Nr. 50, S. 505202
    ISSN: 1361-648X; 0953-8984
  • Ollefs, Katharina; Schöppner, Christian; Titov, Ivan; Meckenstock, Ralf; Wilhelm, Fabrice; Rogalev, Andreï; Liu, J.; Gutfleisch, Oliver; Farle, Michael; Wende, Heiko; Acet, Mehmet
    Magnetic ordering in magnetic shape memory alloy Ni-Mn-In-Co
    In: Physical Review B: Condensed Matter and Materials Physics Jg. 92 (2015) Nr. 22, S. 224429
    ISSN: 1095-3795; 1550-235X; 2469-9969; 0163-1829; 0556-2805; 1098-0121; 2469-9950
  • Bonetti, Stefano; Kukreja, Roopali; Chen, Zhao; Spoddig, Detlef; Ollefs, Katharina; Schöppner, Christian; Meckenstock, Ralf; Ney, Andreas; Pinto, Jude; Houanche, Richard; Frisch, Josef; Stöhr, Joachim; Dürr, Hermann A.; Ohldag, Hendrik
    Microwave soft x-ray microscopy for nanoscale magnetization dynamics in the 5–10 GHz frequency range
    In: Review of Scientific Instruments Jg. 86 (2015) Nr. 9, art. no. 093703
    ISSN: 1089-7623; 0034-6748
  • Ollefs, Katharina; Ney, A.; Farle, Michael; Ney, V.; Schöppner, Christian; Hassel, Christoph; Römer, Florian M.; Spoddig, Detlef; Meckenstock, Ralf
    Toward broad-band x-ray detected ferromagnetic resonance in longitudinal geometry
    In: Journal of Applied Physics Jg. 117 (2015) Nr. 22, S. 223906
    ISSN: 0021-8979; 1089-7550
  • Ye, Shuangli; Klar, Limei; Ney, Andreas; Ney, Verena; Kammermeier, Tom; Ollefs, Katharina; Liu, Feng; Wang, Gaofeng
    Effects of the inhomogenous Co doping on the magnetoresistance of Zn1−xCoxO epitaxial films
    In: Journal of Nanoscience and Nanotechnology Jg. 12 (2012) Nr. 2, S. 1054 - 1058
    ISSN: 1533-4880; 1533-4899
  • Ney, Verena; Ye, Shuangli; Kammermeier, Tom; Ollefs, Katharina; Wilhelm, Fabrice; Rogalev, Andreï; Lebègue, Sébastien; Da Rosa, Andreia L.; Ney, Andreas
    Structural and magnetic analysis of epitaxial films of Gd-doped ZnO
    In: Physical Review B: Condensed Matter and Materials Physics Jg. 85 (2012) Nr. 23, S. 235203
    ISSN: 1095-3795; 1550-235X; 2469-9969; 0163-1829; 0556-2805; 1098-0121; 2469-9950
  • Kronast, Florian; Friedenberger, Nina; Ollefs, Katharina; Gliga, Sebastian; Tati-Bismaths, Logane; Thies, Ronja; Ney, Andreas; Weber, Ramona; Hassel, Christoph; Römer, Florian M.; Trunova, Anastasia; Wirtz, Christian; Hertel, Riccardo; Dürr, Hermann A.; Farle, Michael
    Element-Specific magnetic hysteresis of individual 18 nm Fe nanocubes
    In: Nano Letters Jg. 11 (2011) Nr. 4, S. 1710 - 1715
    ISSN: 1530-6992; 1530-6984
  • Ney, Andreas; Kovacs, Andras; Ney, Verena; Ye, Shuangli; Ollefs, Katharina; Kammermeier, Tom; Wilhelm, Fabrice; Rogalev, Andrei; Dunin-Borkowski, Rafal E.
    Structural, chemical and magnetic properties of secondary phases in co-doped ZnO
    In: New Journal of Physics Jg. 13 (2011) S. 103001
    ISSN: 1367-2630
  • Ney, Andreas; Opel, Matthias; Kaspar, Tiffany C.; Ney, Verena; Ye, Shuangli; Ollefs, Katharina; Kammermeier, Tom; Bauer, Sebastian; Nielsen, Karl-Wilhelm; Goennenwein, Sebastian T. B.
    Advanced spectroscopic synchrotron techniques to unravel the intrinsic properties of dilute magnetic oxides: the case of Co:ZnO
    In: New Journal of Physics Jg. 12 (2010) Nr. 1, S. 013020
    ISSN: 1367-2630
  • Ney, Andreas; Kammermeier, Tom; Ollefs, Katharina; Ye, S.; Ney, Verena; Kaspar, Tiffany C.; Chambers, Scott A.; Wilhelm, Fabrice; Rogalev, Andrei
    Anisotropic paramagnetism of Co-doped ZnO epitaxial films
    In: Physical Review B: Condensed Matter and Materials Physics Jg. 81 (2010) Nr. 5, S. 054420
    ISSN: 1095-3795; 1550-235X; 2469-9969; 0163-1829; 0556-2805; 1098-0121; 2469-9950
  • Ney, Verena; Ye, Shuangli; Ollefs, Katharina; Kammermeier, Tom; Rogalev, Andreï; Ney, Andreas
    Co-doped ZnO epitaxial films: From a brillouin-like paramagnet to a phase-separated superparamagnetic ensemble
    In: Journal of Nanoscience and Nanotechnology Jg. 10 (2010) Nr. 9, S. 5958 - 5963
    ISSN: 1533-4880; 1533-4899
  • Ney, Andreas; Kammermeier, Tom; Ollefs, Katharina; Ney, Verena; Ye, S.; Dhar, Subhabrata; Ploog, Klaus H.; Röver, Martin; Malindretos, Jörg; Rizzi, A.; Wilhelm, Fabrice; Rogalev, Andrei
    Gd-doped GaN studied with element specificity: Very small polarization of Ga, paramagnetism of Gd and the formation of magnetic clusters
    In: Journal of Magnetism and Magnetic Materials Jg. 322 (2010) Nr. 9-12, S. 1162 - 1166
    ISSN: 0304-8853
  • Zhu, Diling; Guizar-Sicairos, Manuel; Wu, Benny; Scherz, Andreas; Acremann, Yves; Tyliszczak, Tolek; Fischer, Peter; Friedenberger, Nina; Ollefs, Katharina; Farle, Michael; Fienup, James R.; Stöhr, Joachim
    High-resolution X-ray lensless imaging by differential holographic encoding
    In: Physical Review Letters Jg. 105 (2010) S. 043901
    ISSN: 1079-7114; 0031-9007
  • Ye, S.; Ney, V.; Kammermeier, T.; Ollefs, Katharina; Zhou, S.; Schmidt, H.; Ney, A.
    Influence of the developing magnetic order on the transport properties of epitaxial Zn₁₋ₓCoₓO films
    In: Journal of Physics: Conference Series Jg. 200 (2010) Nr. SECTION 5,
    ISSN: 1742-6588; 1742-6596
  • Ney, Andreas; Ney, Verena; Ollefs, Katharina; Kammermeier, Tom; Kaspar, Tiffany C.; Chambers, Scott A.; Wilhelm, Fabrice; Rogalev, Andrei
    Magnetism of Co doped ZnO with Al codoping : Carrier-induced mechanisms versus extrinsic origins
    In: Physical Review B: Condensed Matter and Materials Physics Jg. 82 (2010) Nr. 4, 041202(R)
    ISSN: 1095-3795; 1550-235X; 2469-9969; 0163-1829; 0556-2805; 1098-0121; 2469-9950
  • Ye, S.; Ney, V.; Kammermeier, T.; Ollefs, Katharina; Ney, A.; Wilhelm, F.; Rogalev, A.
    Observation of the Onset of Magnetic Clustering in Superparamagnetic Zn1−x Co x O Films
    In: Journal of Superconductivity and Novel Magnetism Jg. 23 (2010) Nr. 1, S. 91 - 94
    ISSN: 1557-1947
  • Ney, Verena; Ye, S.; Kammermeier, Tom; Ollefs, Katharina; Ney, Andreas; Kaspar, Tiffany; Chambers, Scott; Wilhelm, Fabrice; Rogalev, Andrei
    Tuning the magnetic properties of Zn1-xCoxO films
    In: Journal of Magnetism and Magnetic Materials Jg. 322 (2010) Nr. 9-12, S. 1232 - 1234
    ISSN: 0304-8853
  • Ye, S.; Ney, V.; Kammermeier, T.; Ollefs, Katharina; Zhou, S.; Schmidt, H.; Wilhelm, F.; Rogalev, A.; Ney, A.
    Absence of ferromagnetic-transport signatures in epitaxial paramagnetic and superparamagnetic Zn0.95Co0.05O films
    In: Physical Review B: Condensed Matter and Materials Physics Jg. 80 (2009) Nr. 24, S. 245321
    ISSN: 1095-3795; 1550-235X; 2469-9969; 0163-1829; 0556-2805; 1098-0121; 2469-9950
  • Ney, Andreas; Ollefs, Katharina; Ye, Shuangli; Kammermeier, Tom; Ney, Verena; Kaspar, T.C.; Chambers, S.A.; Wilhelm, F.; Rogalev, A.
    Absence of intrinsic ferromagnetic interactions of isolated and paired Co dopant atoms in Zn1-xCoxO with high structural perfection.
    In: Physical Review Letters Jg. 100 (2008) Nr. 15, S. 157201-1 - 157201-4
    ISSN: 1079-7114; 0031-9007
  • Ney, Andreas; Kammermeier, Tom; Ney, Verena; Ye, S.; Ollefs, Katharina; Manuel, E.; Dhar, S.; Ploog, K.H.; Arenholz, E.; Wilhelm, F.; Rogalev, A.
    Element specific magnetic properties of Gd-doped GaN : very small polarization of Ga and paramagnetism of Gd
    In: Physical Review B: Condensed Matter and Materials Physics Jg. 77 (2008) Nr. 23, S. 233308 - 233308-4
    ISSN: 1095-3795; 1550-235X; 2469-9969; 0163-1829; 0556-2805; 1098-0121; 2469-9950
  • Kammermeier, Tom; Ney, Verena; Ye, Shuangli; Ollefs, Katharina; Kaspar, T.C.; Chambers, S.A.; Wilhelm, F.; Rogalev, A.; Ney, Andreas
    Element specific measurements of the structural properties and magnetism of CoxZn1-xO.
    In: Journal of Magnetism and magnetic Materials Jg. 321 (2008) Nr. 7, S. 699 - 701
    ISSN: 0304-8853
  • Ney, Andreas; Kammermeier, Tom; Ney, Verena; Ollefs, Katharina; Ye, Shuangli
    Limitations of measuring small magnetic signals of samples deposited on a diamagnetic substrate
    In: Journal of Magnetism and Magnetic Materials Jg. 320 (2008) Nr. 23, S. 3341
    ISSN: 0304-8853
  • Dissertation

  • Ollefs, Katharina
    Longitudinale röntgendetektierte ferromagnetische Resonanz
    Duisburg, Essen (2012) X, 118 S. : Ill., graph. Darst. X, 118 S. : Ill., graph. Darst.