Dr. André Kobs
Post-Doktorand
| Tel.: |
+49 (0)40 42838 2216 |
| Mobil: |
+49 (0)176-61039466 |
| Fax: |
+49 (0)40 42838 6368 |
| Mail: |
andre.kobs (at) physik.uni-hamburg.de |
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| Büro: |
108 |
| Labor: |
016/9A (Tel: 7637) + 110/11A (Tel:5282) |
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Forschungsprojekte
Focused Ion Beam (FIB) Strukturierung und Lithographie
Untersuchung von Domänenwänden in weichmagnetischen Knick-Drähten
In-situ Magnetowiderstand von Mikro- und Nanostrukturen
Auswirkungen des Gallium-Ionenbeschusses auf Permalloy-Schichtsysteme
Ummagnetisierungsverhalten von rechteckigen Permalloy-Teilchen
Riesenmagnetowiderstand
Domänenwandwiderstand
Magnetowiderstand von Co/Pt Multilagen
Erforschung des von uns entdeckten "anisotropen Grenzflächen-Magnetowiderstands"
Domänenwandwiderstand
Publikationen
2021
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A. Philippi-Kobs, L. Müller, M.H. Berntsen, W. Roseker, M. Riepp, K. Bagschik, J. Wagner, R. Frömter, M. Danailov, F. Capotondi, E. Pedersoli, M. Manfredda, M. Kiskinova, M. Stransky, V. Lipp, A. Scherz, B. Ziaja, H.P. Oepen, G. Grübel
Ultrafast Demagnetization Excited by Extreme Ultraviolet Light From a Free-Electron Laser
submitted, (2021).
2020
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K. Bagschik, M. Schneider, J. Wagner, R. Buß, M. Riepp, A. Philippi-Kobs, L. Müller, W. Roseker, F. Trinter, M. Hoesch, J. Viefhaus, S. Eisebitt, G. Grübel, H.P. Oepen, and R. Frömter
Enabling time-resolved 2D spatial-coherence measurements using the Fourier-analysis method with an integrated curved-grating beam monitor
Opt. Lett. 45, 5591, (2020).
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K. Bagschik, J. Wagner, R. Buß, M. Riepp, A. Philippi-Kobs, L. Müller, J. Buck, F. Trinter, F. Scholz, J. Seltmann, M. Hoesch, J. Viefhaus, G. Grübel, H.P. Oepen, and R. Frömter
Direct 2D spatial-coherence determination using the Fourier-analysis method: Multi-parameter characterization of the P04 beamline at PETRA III
Opt. Express 28, 7282, (2020).
2019
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M. Riepp, L. Müller, A. Philippi-Kobs, W. Roseker, R. Rysov, K. Bagschik, M. Walther, T. Golz N. Stojanovic, G. Grübel, R. Frömter, H.P. Oepen, D. Naumenko, E. Pedersoli, F. Capotondi, and M. Kiskinova
Ultrafast magnetization dynamics at the low-fluence limit supported by external magnetic fields
Proceedings of the 39th International Free-Electron Laser Conference, 574, (2019).
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A. Philippi-Kobs, A. Farhadi, L. Matheis, D. Lott, A. Chuvilin, and H.P. Oepen
Impact of Symmetry on Anisotropic Magnetoresistance in Textured Ferromagnetic Thin Films
Phys. Rev. Lett. 123, 137201, (2019).
2018
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M. Stier, A. Neumann, A. Philippi-Kobs, H.P. Oepen, and M. Thorwart
Implications of a temperature-dependent magnetic anisotropy for superparamagnetic switching
J. Magn. Magn. Mater. 447, 96, (2018).
2017
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F. Lofink, A. Philippi-Kobs, M.R. Rahbar Azad, S. Hankemeier, G. Hoffmann, R. Frömter, and H.P. Oepen
Domain walls in bent nanowires
Phys. Rev. Applied 8, 024008, (2017).
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J. Kimling, A. Philippi-Kobs, J. Jacobsohn, H.P. Oepen, and D.G. Cahill
Thermal conductance of interfaces with amorphous SiO2 measured by time-resolved magneto-optic Kerr-effect thermometry
Phys. Rev. B 95, 184305, (2017).
2016
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A. Kobs and H.P. Oepen
Disentangling interface and bulk contributions to the anisotropic magnetoresistance in Pt/Co/Pt sandwiches
Phys. Rev. B 93, 014426, (2016).
2015
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A. Frauen, A. Kobs, T. Böhnert, A. Michel, G. Winkler, K. Nielsch, and H. P. Oepen
Magnetothermoelectric power in Co/Pt layered structures: Interface versus bulk contributions
Phys. Rev. B 92, 140402(R), (2015).
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G. Winkler, A. Kobs, A. Chuvilin, D. Lott, A. Schreyer, and H.P. Oepen
On the variation of magnetic anisotropy in Co/Pt(111) on silicon oxide
J. Appl. Phys. 117, 105306, (2015).
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C. Weier, R. Adam, D. Rudolf, R. Frömter, P. Grychtol, G. Winkler, A. Kobs, H.P. Oepen, H.C. Kapteyn, M.M. Murnane, and C.M. Schneider
Femtosecond-laser-induced modifications in Co/Pt multilayers studied with tabletop resonant magnetic scattering
Europhys. Lett. 109, 17001, (2015).
2014
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A. Kobs, A. Frauen, and H.P. Oepen
Comment on "Hybrid magnetoresistance in the proximity of a ferromagnet"
Phys. Rev. B 90, 016401, (2014).
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M.R. Rahbar Azad, A. Kobs, B. Beyersdorff, P. Staeck, G. Hoffmann, R. Frömter, and H.P. Oepen
Magnetostatic interaction of permalloy rectangles exhibiting a Landau state investigated by magnetotransport of single rectangles
Phys. Rev. B 90, 014404, (2014).
2013
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L. Müller, C. Gutt, B. Pfau, S. Schaffert, J. Geilhufe, F. Büttner, J. Mohanty, S. Flewett, R. Treusch, S. Düsterer, H. Redlin, A. Al-Shemmary, M. Hille, A. Kobs, R. Frömter, H.P. Oepen, B. Ziaja, N. Medvedev, S.K. Son, R. Thiele, R. Santra, B. Vodungbo, J. Lüning, S. Eisebitt, and G. Grübel
Breakdown of the X-Ray Resonant Magnetic Scattering Signal during Intense Pulses of Extreme Ultraviolet Free-Electron-Laser Radiation
Phys. Rev. Lett. 110, 234801, (2013).
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J. Kimling, T. Gerhardt, A. Kobs, A. Vogel, S. Wintz, M.-Y. Im, P. Fischer, H.P. Oepen, U. Merkt, and G. Meier
Tuning of the nucleation field in nanowires with perpendicular magnetic anisotropy
J. Appl. Phys. 113, 163902, (2013).
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L. Müller, C. Gutt, S. Streit-Nierobisch, M. Walther, S. Schaffert, B. Pfau, J. Geilhufe, F. Büttner, S. Flewett, C.M. Günther, S. Eisebitt, A. Kobs, M. Hille, D. Stickler, R. Frömter, H.P. Oepen, J. Lüning, and G. Grübel
Endstation for ultrafast magnetic scattering experiments at the free-electron laser in Hamburg
Rev. Sci. Instrum. 84, 013906, (2013).
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M. Hille, A. Frauen, B. Beyersdorff, A. Kobs, S. Hesse, R. Frömter, and H.P. Oepen
Direct method for measuring the canting angle of magnetization
J. Appl. Phys. 113, 023902, (2013).
2012
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A. Kobs, S. Heße, H. P. Oepen, and P. Weinberger
Anisotropic Interface Magnetoresistances in Pt(111)/Con/Pt(111)
Philos. Mag. 92, 2835, (2012).
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B. Pfau, S. Schaffert, L. Müller, C. Gutt, A. Al-Shemmary, F. Büttner, R. Delaunay, S. Düsterer, S. Flewett, R. Frömter, J. Geilhufe, E. Guehrs, C.M. Günther, R. Hawaldar, M. Hille, N. Jaouen, A. Kobs, K. Li, J. Mohanty, H. Redlin, W.F. Schlotter, D. Stickler, R. Treusch, B. Vodungbo, M. Kläui, H.P. Oepen, J. Lüning, G. Grübel, and S. Eisebitt
Ultrafast optical demagnetization manipulates nanoscale spin structure in domain walls
Nat. Commun. 3, 1100, (2012).
2011
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A. Kobs, S. Hege, W. Kreuzpaintner, G. Winkler, D. Lott, P. Weinberger, A. Schreyer, and H.P. Oepen
Anisotropic Interface Magnetoresistance in Pt/Co/Pt Sandwiches
Phys. Rev. Lett. 106, 217207, (2011).
2010
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C. Tieg, R. Frömter, D. Stickler, S. Hankemeier, A. Kobs, S. Streit-Nierobisch, C. Gutt, G. Grübel, and H. P. Oepen
Imaging the in-plane magnetization in a Co microstructure by Fourier transform holography
Opt. Express 18, 27251, (2010).
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S. Hankemeier, A. Kobs, R. Frömter and H.P. Oepen
Controlling the properties of vortex domain walls via magnetic seeding fields
Phys. Rev. B 82, 064414, (2010).
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C. Gutt, S. Streit-Nierobisch, L.M. Stadler, B. Pfau, C.M. Günther, R. Könnecke, R. Frömter, A. Kobs, D. Stickler, H.P. Oepen, R.R. Fäustlin, R. Treusch, J. Feldhaus, E. Weckert, I.A. Vartanyants, M. Grunze, A. Rosenhahn, T. Wilhein, S. Eisebitt, and G. Grübel
Single-pulse resonant magnetic scattering using a soft x-ray free-electron laser
Phys. Rev. B 81, 100401(R), (2010).
2009
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A. Kobs, H. Spahr, D. Stickler, S. Hankemeier, R. Frömter, and H.P. Oepen
Magnetic energies of single submicron permalloy rectangles determined via magnetotransport
Phys. Rev. B 80, 134415, (2009).
2008
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D. Stickler, R. Frömter, W. Li, A. Kobs, HP. Oepen
Integrated setup for the fabrication and measurement of magnetoresistive nanoconstrictions in ultrahigh vacuum.
Rev. Sci. Instrum. 79, 103901, (2008).
