Dr. Stephan Geprägs

Contact
Room 135
+49 (0) 89 289 - 14225
Assignments
  • Staff Scientist: Magnetism and Spintronics
  • Staff Scientist: Thin Film Technology

 

Stephan Geprägs holds a position as senior scientist in the magnetism group of the Walther-Meißner-Institute (WMI) of the Bavarian Academy of Sciences and Humanities (BADW) since 2015. He studied physics at the Technical University of Munich (TUM), where he completed his diploma thesis working on electron doping and structural effects in ferromagnetic double perovskites. As a PhD student, he investigated magnetoelectric interactions in multiferroic thin films and composites at the WMI and received his PhD in 2011. Since 2012, he is working as a research scientist at the WMI and became a permanent staff member in 2015. His research interests are spin physics, multifunctional novel materials and thin film structures.

 

Recent Courses
Novel Topics in Magnetism: quantum hybrid systems, spin dynamics, and angular momentum transport (0000003937)
Proseminar | S 2024
Publications of Dr. Stephan Geprägs

2024

Chiral phonons and phononic birefringence in ferromagnetic metal-bulk acoustic resonator hybrids
Research Article | Physical Review B 109, 024430  (2024)
Preprint: arXiv:2303.08429
Manuel Müller, Johannes Weber, Fabian Engelhardt, Victor A. S. V. Bittencourt, Thomas Luschmann, Mikhail Cherkasskii, Matthias Opel, Sebastian T.B. Goennenwein, Silvia Viola Kusminskiy, Stephan Geprägs, Rudolf Gross, Matthias Althammer, Hans Huebl

2023

Emission of coherent THz magnons in an antiferromagnetic insulator triggered by ultrafast spin–phonon interactions
Research Article | Nature Communications 14, 1818  (2023)
E. Rongione, O. Gueckstock, M. Mattern, O. Gomonay, H. Meer, C. Schmitt, R. Ramos, T. Kikkawa, M. Mičica, E. Saitoh, J. Sinova, H. Jaffrès, J. Mangeney, S. T. B. Goennenwein, S. Geprägs, T. Kampfrath, M. Kläui, M. Bargheer, T. S. Seifert, S. Dhillon, R. Lebrun
Festkörperphysik. Aufgaben und Lösungen (3rd revised and extended edition)
Book | Walther de Gruyter GmbH, Berlin/Boston , ISBN: 9783110782356 (hardcover), ISBN: 9783110782530 (eBook)  (2023)
Rudolf Gross , Achim Marx , Dietrich Einzel, Stephan Geprägs
Impact of growth conditions on magnetic anisotropy on the magnon Hanle effect in α-Fe2O3
Research Article | APL Materials 11, 091115  (2023)
Preprint: arXiv:2306.00375
Monika Scheufele, Janine Gückelhorn, Matthias Opel, Akashdeep Kamra, Hans Huebl, Rudolf Gross, Stephan Geprägs, Matthias Althammer
Nonreciprocal Magnon Hanle Effect in Antiferromagnetic α-Fe2O3
Research Article | 2023 IEEE International Magnetic Conference - Short Papers INTERMAG Short Papers, 1-2  (2023)
Janine Gückelhorn, Sebastián de-la-Peña, Monika Scheufele, Matthias Grammer, Matthias Opel, Stephan Geprägs, Juan Carlos Cuevas, Rudolf Gross, Hans Huebl, Akashdeep Kamra, Matthias Althammer
Observation of nonreciprocal magnon Hanle effect
Research Article | Physical Review Letters 130, 216703  (2023)
Preprint: arXiv:2209.09040
Janine Gückelhorn, Sebastián de-la-Peña, Matthias Grammer, Monika Scheufele, Matthias Opel, Stephan Geprägs, Juan Carlos Cuevas, Rudolf Gross, Hans Huebl, Akashdeep Kamra, Matthias Althammer
Spin Hall Magnetoresistance in Antiferromagnetic Insulators
Research Article | 2023 IEEE International Magnetic Conference - Short Papers INTERMAG Short Papers, 1-2  (2023)
Stephan Geprägs, Matthias Opel, Johanna Fischer, Philipp Schwenke, Matthias Althammer, Hans Huebl, Rudolf Gross
Surface acoustic wave resonators on thin film piezoelectric substrates in the quantum regime
Research Article | Materials for Quantum Technology 3, 021001  (2023)
Preprint: arXiv:2301.11213
Thomas Luschmann, Alexander Jung, Stephan Geprägs, Franz X. Haslbeck, Achim Marx, Stefan Filipp, Simon Gröblacher, Rudolf Gross, Hans Huebl

2022

Influence of low-energy magnons on magnon Hanle experiments in easy-plane antiferromagnets
Research Article | Physical Review B 105, 094440  (2022)
Preprint: arXiv:2112.03820
Janine Gückelhorn, Akashdeep Kamra, Tobias Wimmer, Matthias Opel, Stephan Geprägs, Rudolf Gross, Hans Huebl, Matthias Althammer
Low-temperature nanoscale heat transport in a gadolinium iron garnet heterostructure probed by ultrafast x-ray diffraction
Research Article | Structural Dynamics 9, 045101  (2022)
Preprint: arXiv:2207.14409
Deepankar Sri Gyan, Danny Mannix, Dina Carbone, James L. Sumpter, Stephan Geprägs, Maxim Dietlein, Rudolf Gross, Andrius Jurgilaitis, Van-Thai Pham, Helene Coudert-Alteirac, Jörgen Larsson, Daniel Haskel, Jörg Strempfer, Paul G. Evans
Quantum critical fluctuations in an Fe-based superconductor
Research Article | Comms. Phys. 5, 201  (2022)
Preprint: arXiv:2111.07521
Daniel Jost, Leander Peis, Ge He, Andreas Baum, Stephan Geprägs, Johanna C. Palmstrom, Matthias S. Ikeda, Ian R. Fisher, Thomas Wolf, Samuel Lederer, Rudi Hackl
Reduced effective magnetization and damping by slowly-relaxing impurities in strained γ-Fe2O3 thin films
Research Article | Journal of Applied Physics 132, 233905  (2022)
Preprint: arXiv:2204.11498
Manuel Müller, Monika Scheufele, Janine Gückelhorn, Luis Flacke, Mathias Weiler, Hans Huebl, Stephan Geprägs, Rudolf Gross, Matthias Althammer

2021

Growth of Aluminum Nitride on a Silicon Nitride Substrate for Hybrid Photonic Circuits
Research Article | Materials for Quantum Technology 1, 021002  (2021)
Preprint: arXiv:2103.08318
G. Terrasanta, M. Müller, T. Sommer, S. Geprägs, R. Gross, M. Althammer, M. Poot
Growth optimization of TaN for superconducting spintronics
Research Article | Materials for Quantum Technology 1, 045001  (2021)
Preprint: arXiv:2102.09018
Manuel Müller, Raphael Hoepfl, Lukas Liensberger, Stephan Geprägs, Hans Huebl, Mathias Weiler, Rudolf Gross, Matthias Althammer
Low Temperature Suppression of the Spin Nernst Angle in Pt
Research Article | Physical Review B 104, L140404  (2021)
Preprint: arXiv:2103.12697
Tobias Wimmer, Janine Gückelhorn, Sebastian Wimmer, Sergiy Mankovsky, Hubert Ebert, Matthias Opel, Stephan Geprägs, Rudolf Gross, Hans Huebl, Matthias Althammer
Magnon transport in Y3Fe5O12/Pt nanostructures with reduced effective magnetization
Research Article | Physical Review B 104, L180410  (2021)
Preprint: arXiv:2108.03263
Janine Gückelhorn, Tobias Wimmer, Manuel Müller, Stephan Geprägs, Hans Huebl, Rudolf Gross, Matthias Althammer
Quantifying the spin mixing conductance of EuO/W heterostructures by spin Hall magnetoresistance experiments
Research Article | Applied Physics Letters 118, 192401  (2021)
Preprint: arXiv:2103.02706
Paul Rosenberger, Matthias Opel, Stephan Geprägs, Hans Huebl, Rudolf Gross, Martina Müller, Matthias Althammer
Robust formation of nanoscale magnetic skyrmions in easy-plane thin film multilayers with low damping
Research Article | Physical Review B 104, L100417  (2021)
Preprint: arXiv:2102.11117
Luis Flacke, Valentin Ahrens, Simon Mendisch, Lukas Körber, Tobias Böttcher, Elisabeth Meidinger, Misbah Yaqoob, Manuel Müller, Lukas Liensberger, Attila Kákay, Markus Becherer, Philipp Pirro, Matthias Althammer, Stephan Geprägs, Hans Huebl, Rudolf Gross, Mathias Weiler
Unexpected precipitates in conjunction with layer-by-layer growth in Mn-enriched La2/3Sr1/3MnO3 thin films
Research Article | Thin Solid Films 735, 138862  (2021)
Alexandra Steffen, Artur Glavic, Thomas Gutberlet, Haile Ambaye, Jürgen Schubert, Stephan Geprägs, Juri Barthel, Stefan Mattauch, Willi Zander, Maximilian Kruth, Patrick Schöffmann, Sabine Pütter, Thomas Brückel

2020

Effect of interfacial oxidation layer in spin pumping experiments on Ni80Fe20/SrIrO3 heterostructures
Research Article | Journal of Applied Physics 128, 083903  (2020)
T.S. Suraj, Manuel Müller, Sarah Gelder, Stephan Geprägs, Matthias Opel, Mathias Weiler, K. Sethupathi, Hans Huebl, Rudolf Gross, M.S. Ramachandra Rao, Matthias Althammer
Large spin Hall magnetoresistance in antiferromagnetic α-Fe2O3/Pt heterostructures
Research Article | Physical Review Applied 13, 014019  (2020)
Preprint: arXiv:1907.13393
Johanna Fischer, Matthias Althammer, Nynke Vlietstra, Hans Huebl, Sebastian T.B. Goennenwein, Rudolf Gross, Stephan Geprägs, Matthias Opel
Observation of Antiferromagnetic Magnon Pseudospin Dynamics and the Hanle Effect
Research Article | Physical Review Letters 125, 247204  (2020)
Preprint: arXiv:2008.00440
Tobias Wimmer, Akashdeep Kamra, Janine Gückelhorn, Matthias Opel, Stephan Geprägs, Rudolf Gross, Hans Huebl, Matthias Althammer
Precise control of Jeff=1/2 magnetic properties in Sr2IrO4 epitaxial thin films by variation of strain and thin film thickness
Research Article | Physical Review B 102, 214402  (2020)
Preprint: arXiv:2009.13185
Stephan Geprägs, Björn Erik Skovdal, Monika Scheufele, Matthias Opel, Didier Wermeille, Paul Thompson, Alessandro Bombardi, Virginie Simonet, Stéphane Grenier, Pascal Lejay, Gilbert Andre Chahine, Diana Quintero Castro, Rudolf Gross, Dan Mannix
Quantitative comparison of magnon transport experiments in three-terminal YIG/Pt nanostructures acquired via dc and ac detection techniques
Research Article | Applied Physics Letters 117, 182401  (2020)
J. Gückelhorn, T. Wimmer, S. Geprägs, H. Huebl, R. Gross, and M. Althammer
Resonant nanodiffraction x-ray imaging reveals role of magnetic domains in complex oxide spin caloritronics
Research Article | Science Advances 6, eaba9351  (2020)
Paul G. Evans, Samuel D. Marks, Stephan Geprägs, Maxim Dietlein, Yves Joly, Minyi Dai, Jiamian Hu, Laurence Bouchenoire, Paul B. J. Thompson, Tobias U. Schülli, Marie-Ingrid Richard, Rudolf Gross, Dina Carbone, Danny Mannix
Spin Hall magnetoresistance in antiferromagnetic insulators
Review | Journal of Applied Physics 127, 243902  (2020)
Preprint: arXiv:2004.02639
Stephan Geprägs, Matthias Opel, Johanna Fischer, Olena Gomonay, Philipp Schwenke, Matthias Althammer, Hans Huebl, Rudolf Gross
Static magnetic proximity effects and spin Hall magnetoresistance in Pt/Y3Fe5O12 and inverted Y3Fe5O12/Pt bilayers
Research Article | Physical Review B 102, 214438  (2020)
Preprint: arXiv:2010.03979
Stephan Geprägs, Christoph Klewe, Sibylle Meyer, Dominik Graulich, Felix Schade, Marc Schneider, Sonia Francoual, Stephen P. Collins, Katharina Ollefs, Fabrice Wilhelm, Andrei Rogalev, Yves Joly, Sebastian T.B. Goennenwein, Matthias Opel, Timo Kuschel, Rudolf Gross

2019

Anomalous spin Hall angle of a metallic ferromagnet determined by a multiterminal spin injection/detection device
Research Article | Applied Physics Letters 115, 092404  (2019)
Tobias Wimmer, Birte Coester, Stephan Geprägs, Rudolf Gross, Sebastian T. B. Goennenwein, Hans Huebl, Matthias Althammer
Exchange-enhanced Ultrastrong Magnon-Magnon Coupling in a Compensated Ferrimagnet
Research Article | Physical Review Letters 123, 117204  (2019)
Lukas Liensberger, Akashdeep Kamra, Hannes Maier-Flaig, Stephan Geprägs, Andreas Erb, Sebastian T. B. Goennenwein, Rudolf Gross, Wolfgang Belzig, Hans Huebl, Mathias Weiler
High spin-wave propagation length consistent with low damping in a metallic ferromagnet
Research Article | Applied Physics Letters 115, 122402  (2019)
Luis Flacke, Lukas Liensberger, Matthias Althammer, Hans Huebl, Stephan Geprägs, Katrin Schultheiss, Aleksandr Buzdakov, Tobias Hula, Helmut Schultheiss, Eric R. J. Edwards, Hans T. Nembach, Justin M. Shaw, Rudolf Gross, Mathias Weiler
Spin Transport in a Magnetic Insulator with Zero Effective Damping
Research Article | Physical Review Letters 123, 257201  (2019)
Tobias Wimmer, Matthias Althammer, Lukas Liensberger, Nynke Vlietstra, Stephan Geprägs, Mathias Weiler, Rudolf Gross, Hans Huebl

2018

Festkörperphysik: Aufgaben und Lösungen (2. Auflage)
Book | Walter de Gruyter GmbH, Berlin, ISBN 978-3-11-056611-6 (gebunden), ISBN 978-3-11-056635-2 (eBook) , Seiten: 327  (2018)
Rudolf Gross, Achim Marx, Dietrich Einzel, Stephan Geprägs
Lock-in thermography measurements of the spin Peltier effect in a compensated ferrimagnet and its comparison to the spin Seebeck effect
Research Article | Journal of Physics D: Applied Physics 51, 194002  (2018)
Ahmet Yagmur, Ryo Iguchi, Stephan Gepraegs, Andreas Erb, Shunsuke Daimon, Eiji Saitoh, Rudolf Gross, Ken-ichi Uchida
Spin Hall magnetoresistance in antiferromagnet/heavy-metal heterostructures
Research Article | Physical Review B 97, 014417  (2018)
Preprint: arXiv:1709.04158
Johanna Fischer, Olena Gomonay, Richard Schlitz, Kathrin Ganzhorn, Nynke Vlietstra, Matthias Althammer, Hans Huebl, Matthias Opel, Rudolf Gross, Sebastian T.B. Goennenwein, Stephan Geprägs
Spin-Torque Excitation of Perpendicular Standing Spin Waves in Coupled YIG/Co Heterostructures
Research Article | Physical Review Letters 120, 127201  (2018)
Stefan Klingler, Vivek Amin, Stephan Geprägs, Kathrin Ganzhorn, Hannes Maier-Flaig, Matthias Althammer, Hans Huebl, Rudolf Gross, Robert D. McMichael, Mark D. Stiles, Sebastian T.B. Goennenwein, and Mathias Weiler

2017

Non-local magnon transport in the compensated ferrimagnet GdIG
Research Article | arXiv:1705.02871
Kathrin Ganzhorn, Tobias Wimmer, Joseph Barker, Gerrit E. W. Bauer, Zhiyong Qiu, Eiji Saitoh, Nynke Vlietstra, Stephan Geprägs, Rudolf Gross, Hans Huebl, Sebastian T.B. Goennenwein
Perpendicular magnetic anisotropy in insulating ferrimagnetic gadolinium iron garnet thin films
Research Article | arXiv:1706.08488
H. Maier-Flaig, S. Geprägs, Z. Qiu, E. Saitoh, R. Gross, M. Weiler, H. Huebl, S. T. B. Goennenwein
Co11Li[(OH)5O][(PO3OH)(PO4)5], a Lithium-Stabilized, Mixed-Valent Cobalt(II,III) Hydroxide Phosphate Framework
Research Article | Inorg. Chem. 56, 10950  (2017)
Jennifer Ludwig, Stephan Geprägs, Dennis Nordlund, Marca M. Doeff, Tom Nilges
Direct synthesis and characterization of mixed-valent Li0.5-deltaCoPO4, a Li-deficient derivative of the Cmcm polymorph of LiCoPO4
Research Article | RSC Adv. 7, 28069-28081  (2017)
Jennifer Ludwig, Carlos Alarcón-Suesca, Stephan Geprägs, Dennis Nordlund, Marca M. Doeff, Inés Puente Orench, Tom Nilges
Helimagnon resonances in an intrinsic chiral magnonic crystal
Research Article | Physical Review Letters 119, 237204  (2017)
Mathias Weiler, Aisha Aqeel, Maxim Mostovoy, Andrey Leonov, Stephan Geprägs, Rudolf Gross, Hans Huebl, Thomas T. M. Palstra, Sebastian T. B. Goennenwein
Impact of the interface quality of Pt/YIG(111) hybrids on their spin Hall magnetoresistance
Research Article | Appl. Phys. Lett. 110, 011101  (2017)
Sabine Pütter, Stephan Geprägs, Richard Schlitz, Matthias Althammer, Andreas Erb, Rudolf Gross, Sebastian T. B. Goennenwein
Magnon mode selective spin transport in compensated ferrimagnets
Research Article | Nano Letters 17(6), 3334-3340  (2017)
Joel Cramer, Er-Jia Guo, Stephan Geprägs, Andreas Kehlberger, Yurii P. Ivanov, Kathrin Ganzhorn, Francesco Della Coletta, Matthias Althammer, Hans Huebl, Rudolf Gross, Jürgen Kosel, Mathias Kläui, Sebastian T. B. Goennenwein
Observation of the spin Nernst effect
Research Article | Nature Materials 16, 977-981  (2017)
Sibylle Meyer, Yan-Ting Chen, Sebastian Wimmer, Matthias Althammer, Stephan Geprägs, Hans Huebl, D. Ködderitzsch, Hubert Ebert, Gerrit E.W. Bauer, Rudolf Gross, Sebastian T.B. Goennenwein
Pure spin current transport in gallium doped zinc oxide
Research Article | Applied Physics Letters 110, 052403  (2017)
Matthias Althammer, Joynarayan Mukherjee, Stephan Geprägs, Sebastian T. B. Goennenwein, Matthias Opel, M.S. Ramachandra Rao, Rudolf Gross
Temperature dependence of the non-local spin Seebeck effect in YIG/Pt nanostructures
Research Article | AIP Advances 7, 085102  (2017)
Kathrin Ganzhorn, Tobias Wimmer, Joel Cramer, Richard Schlitz, Stephan Geprägs, Gerhard Jakob, Rudolf Gross, Hans Huebl, Mathias Kläui, Sebastian T. B. Goennenwein
Tunable magnon-photon coupling in a compensating ferrimagnet - from weak to strong coupling
Research Article | Applied Physics Letters 110, 132401  (2017)
H. Maier-Flaig, M. Harder, S. Klingler, Z. Qiu, E. Saitoh, M. Weiler, S. Geprägs, R.Gross, S. T. B. Goennenwein, H. Huebl

2016

Magnon-based logic in a multi-terminal YIG/Pt nanostructure
Research Article | Applied Physics Letters 109, 022405  (2016)
Kathrin Ganzhorn, Stefan Klingler, Tobias Wimmer, Stephan Geprägs, Rudolf Gross, Hans Huebl, Sebastian T. B. Goennenwein
Origin of the spin Seebeck effect probed by temperature dependent measurements in Gd3Fe5O12
Research Article | Nature Communications 7, 10452  (2016)
Stephan Geprägs, Andreas Kehlberger, Tomek Schulz, Christian Mix, Francesco Della Coletta, Sibylle Meyer, Akashdeep Kamra, Matthias Althammer, Gerhard Jakob, Hans Huebl, Rudolf Gross, Sebastian T.B. Goennenwein, Mathias Kläui
Spin Hall Magnetoresistance in a Canted Ferrimagnet
Research Article | Physical Review B 94, 094401  (2016)
Kathrin Ganzhorn, Joseph Barker, Richard Schlitz, Benjamin A. Piot, Katharina Ollefs, Francois Giullou, Fabrice Wilhelm, Andrei Rogalev, Matthias Opel, Matthias Althammer, Stephan Geprägs, Hans Huebl, Rudolf Gross, Gerrit E. W. Bauer, Sebastian T. B. Goennenwein
Spin Seebeck effect at microwave frequencies
Research Article | Physical Review B 93, 224430  (2016)
Michael Schreier, Franz Kramer, Hans Huebl, Stephan Geprägs, Rudolf Gross, Sebastian T. B. Goennenwein, Timo Noack, Thomas Langner, Alexander A. Serga, Burkard Hillebrands, Vitaliy I. Vasyuchka
Untangling the contributions of cerium and iron to the magnetism of Ce-doped yttrium iron garnet
Research Article | Applied Physics Letters 108, 102407  (2016)
Blai Casals, Marina Espínola, Rafael Cichelero, Stephan Geprägs, Matthias Opel, Rudolf Gross, Gervasi Herranz, Josep Fontcuberta

2015

Anomalous Hall effect in YIG|Pt bilayers
Research Article | Applied Physics Letters 106, 132402  (2015)
Sibylle Meyer, Richard Schlitz, Stephan Geprägs, Matthias Opel, Hans Huebl, Rudolf Gross, Sebastian T. B. Goennenwein
Current-induced spin torque resonance of a magnetic insulator
Research Article | Physical Review B 92, 144411  (2015)
Michael Schreier, Takahiro Chiba, Arthur Niedermayr, Johannes Lotze, Hans Huebl, Stephan Geprägs, Saburo Takahashi, Gerrit E. W. Bauer, Rudolf Gross, Sebastian T. B. Goennenwein
Spin pumping in YIG/Pt bilayers as a function of layer thickness
Research Article | Physical Review B 92, 054437  (2015)
M. Haertinger, C. H. Back, J. Lotze, M. Weiler, S. Geprägs, H. Huebl, S. T. B. Goennenwein, and G. Woltersdorf

2014

Laser molecular beam epitaxy of ZnO thin films and heterostructures
Review | J. Phys. D: Appl. Phys. 47, 034002  (2014)
Matthias Opel, Stephan Geprägs, Matthias Althammer, Thomas Brenninger, Rudolf Gross
Spin Hall noise
Research Article | Physical Review B 90, 214419  (2014)
Akashdeep Kamra, Friedrich P. Witek, Sibylle Meyer, Hans Huebl, Stephan Geprägs, Rudolf Gross, Gerrit E. W. Bauer, Sebastian T. B. Goennenwein
Strain-controlled nonvolatile magnetization switching
Research Article | Solid State Communications 198, 7-12  (2014)
Stephan Geprägs, Andreas Brandlmaier, Martin S. Brandt, Rudolf Gross, Sebastian T.B. Goennenwein
Temperature dependent spin transport properties of Platinum inferred from spin Hall magnetoresistance measurements
Research Article | Applied Physics Letters 104, 242411  (2014)
Sibylle Meyer, Matthias Althammer, Stephan Geprägs, Matthias Opel, Rudolf Gross, Sebastian T. B. Goennenwein
Time resolved spin Seebeck effect experiments
Research Article | Applied Physics Letters 104, 202410  (2014)
Niklas Roschewsky, Michael Schreier, Akashdeep Kamra, Felix Schade, Kathrin Ganzhorn, Sibylle Meyer, Hans Huebl, Stephan Geprägs, Rudolf Gross, Sebastian T. B. Goennenwein

2013

Comment on 'Pt magnetic polarization on Y3Fe5O12 and magnetotransport characteristics'
Research Article | arXiv:1307.4869
Stephan Geprägs, Sebastian T.B. Goennenwein, Marc Schneider, Fabrice Wilhelm, Katharina Ollefs, Andrei Rogalev, Matthias Opel, Rudolf Gross
Converse Magnetoelectric Effects in Fe3O4/BaTiO3 Multiferroic Hybrids
Research Article | Physical Review B 88, 054412  (2013)
S. Geprägs, D. Mannix, M. Opel, S.T.B. Goennenwein, R. Gross
Investigation of Induced Pt Magnetic Polarisation in Pt/Y3Fe5O12 Bilayers
Other | ESRF Highlights 2013, 88-89  (2013)
Stephan Geprägs, Sibylle Meyer, Stephan Altmannshofer, Matthias Opel, Fabrice Wilhelm, Andrei Rogalev, Rudolf Gross, Sebastian T.B. Goennenwein
Quantitative study of the spin Hall magnetoresistance in ferromagnetic insulator/normal metal hybrids
Research Article | Physical Review B 87, 224401  (2013)
Matthias Althammer, Sibylle Meyer, Hiroyasu Nakayama, Michael Schreier, Stephan Altmannshofer, Mathias Weiler, Hans Huebl, Stephan Geprägs, Matthias Opel, Rudolf Gross, Daniel Meier, Christoph Klewe, Timo Kuschel, Jan-Michael Schmalhorst, Günter Reiss, Liming Shen, Arunava Gupta, Yan-Ting Chen, Gerrit E. W. Bauer, Eiji Saitoh, Sebastian T. B. Goennenwein
Spin Hall Magnetoresistance Induced by a Non-Equilibrium Proximity Effect
Research Article | Physical Review Letters 110, 206601  (2013)
H. Nakayama, M. Althammer, Y.-T. Chen, K. Uchida, Y. Kajiwara, D. Kikuchi, T. Ohtani, S. Geprägs, M. Opel, S. Takahashi, R. Gross, G. E. W. Bauer, S. T. B. Goennenwein, E. Saitoh

2012

Giant Magnetoelastic Effects in BaTiO3-based Extrinsic Multiferroic Hybrids
Research Article | Physical Review B 86, 134432  (2012)
Stephan Geprägs, Matthias Opel, Sebastian T. B. Goennenwein, Rudolf Gross
Investigation of induced Pt magnetic polarization in Pt/Y3Fe5O12 bilayers
Research Article | Appl. Phys. Lett. 101, 262407  (2012)
Stephan Geprägs, Sibylle Meyer, Stephan Altmannshofer, Matthias Opel, Fabrice Wilhelm, Andrei Rogalev, Rudolf Gross, Sebastian T.B. Goennenwein
Magneto-optical imaging of elastic strain-controlled magnetization reorientation
Research Article | Eur. Phys. J. B 85, 124  (2012)
A. Brandlmaier, M. Brasse, S. Geprägs, M. Weiler, R. Gross, S. T. B. Goennenwein

2011

Magnetoelectric Interactions in Multiferroic Thin Films and Composites
PHD Thesis |
Geprägs, Stephan
Nonvolatile, reversible electric-field controlled switching of remanent magnetization in multifunctional ferromagnetic/ferroelectric hybrids
Research Article | Journal of Applied Physics 110, 043913  (2011)
A. Brandlmaier, S. Geprägs, G. Woltersdorf, R. Gross, and S. T. B. Goennenwein
Novel Multifunctional Materials Based on Oxide Thin Films and Artificial Heteroepitaxial Multilayers
Other | Physica Status Solidi A 208, 232-251  (2011)
M. Opel, S. Geprägs, E.P. Menzel, A. Nielsen, D. Reisinger, K.-W. Nielsen, A. Brandlmaier, F.D. Czeschka, M. Althammer, M. Weiler, S.T.B. Goennenwein, J. Simon, M. Svete, Wentao Yu, S.-M. Hühne, W. Mader, and R. Gross

2010

Electric field controlled manipulation of the magnetization in Ni/BaTiO3 hybrid structures
Research Article | Applied Physics Letters 96, 142509  (2010)
S. Geprägs, A. Brandlmaier, M. Opel, R. Gross, S.T.B. Goennenwein

2009

Epitaxial Growth and Magnetic Properties of Sr2CrReO6 Thin Films
Research Article | J. Magn. Magn. Mater., 321, 2001-2004  (2009)
S. Geprägs, F.D. Czeschka, M. Opel, S.T.B. Goennenwein, W. Yu, W. Mader, and R. Gross
Epitaxial ZnxFe3-xO4 Thin Films: A Spintronic Material with Tunable Electrical and Magnetic Properties
Research Article | Physical Review B 79, 134405  (2009)
D. Venkateshvaran, M. Althammer, A. Nielsen, S. Geprägs, M.S. Ramachandra Rao, S. T. B. Goennenwein, M. Opel, and R. Gross
Giant magnetic anisotropy changes in Sr2CrReO6 thin films on BaTiO3
Research Article | Applied Physics Letters 95, 062508  (2009)
F.D. Czeschka, S. Gepraegs, M. Opel, S.T.B. Goennenwein, R. Gross
Voltage controlled inversion of magnetic anisotropy in a ferromagnetic thin film at room temperature
Research Article | New J. Phys. 11, 013021  (2009)
M. Weiler, A. Brandlmaier, S. Gepraegs, M. Althammer, M. Opel, C. Bihler, H. Huebl, M. S. Brandt, R. Gross, S. T. B. Goennenwein

2008

Ga1-xMnxAs/piezoelectric actuator hybrids: A model system for magnetoelastic magnetization manipulation
Research Article | Physical Review B 78, 045203  (2008)
C. Bihler, M. Althammer, A. Brandlmaier, S. Geprägs, M. Weiler, M. Opel, W. Schoch, W. Limmer, R. Gross, M. S. Brandt, and S.T.B. Gönnenwein,
In situ Manipulation of Magnetic Anisotropy in Magnetite Thin Films
Research Article | Physical Review B 77, 104445  (2008)
A. Brandlmaier, S. Geprägs, M. Weiler, A. Boger, M. Opel, H. Huebl, C. Bihler, M.S. Brandt, B. Botters, D. Grundler, R. Gross, S.T.B. Gönnenwein
Piezo-voltage Control of Magnetization Orientation in a Ferromagnetic Semiconductor
Research Article | phys. stat. sol. (RRL) 2, 96 - 98  (2008)
S.T.B. Goennenwein, M. Althammer, C. Bihler, A. Brandlmaier, S. Geprägs, M. Opel, R. Gross, W. Schoch, W. Limmer, H. Huebl, M. S. Brandt

2007

Multiferroic materials based on artificial thin film heterostructures
Other | Philosophical Magazine Letters 87, 141- 154  (2007)
S. Geprägs, M. Opel, S.T.B. Gönnenwein & R. Gross

2006

Electron doping in the double perovskite LaxA2 - xCrWO6 with A = Sr and Ca
Research Article | Journal of Applied Physics 99, 08J102  (2006)
S. Geprägs, P. Majewski, R. Gross, C. Ritter & L. Alff

2005

Epitaxial growth of electron doped double perovskites LaxA2-xCrWO6 with A=Sr and Ca
Research Article | Journal of Magnetism and Magnetic Materials 290--291, 1154-1157  (2005)
P. Majewski, S. Geprägs, A. Boger, M. Opel, L. Alff & R. Gross
Magnetic moments of W 5d in Ca2CrWO6 and Sr2CrWO6 double perovskites
Research Article | Physical Review B 72, 132402  (2005)
P. Majewski, S. Geprägs, A. Boger, M. Opel, A. Erb, R. Gross, G. Vaitheeswaran, V. Kanchana, A. Delin, F. Wilhelm, A. Rogalev & L. Alff
Magnetic moments of W 5d in Ca2CrWO6 and Sr2CrWO6 double perovskites
Research Article | Physical Review B 72, 132402  (2005)
Majewski, P; Geprags, S; Boger, A; Opel, M; Erb, A; Gross, R; Vaitheeswaran, G; Kanchana, V; Delin, A; Wilhelm, F; Rogalev, A; Alff, L
X-ray magnetic circular dichroism study of Re 5d magnetism in Sr2CrReO6
Research Article | Applied Physics Letters 87, 202503  (2005)
P. Majewski, S. Geprägs, O. Sanganas, M. Opel, R. Gross, F. Wilhelm, A. Rogalev & L. Alff
X-ray magnetic circular dichroism study of Re 5d magnetism in Sr2CrReO6
Research Article | Applied Physics Letters 87, 202503  (2005)
Majewski, P; Geprags, S; Sanganas, O; Opel, M; Gross, R; Wilhelm, F; Rogalev, A; Alff, L

2004

A-site-disorder-dependent percolative transport and Griffiths phase in doped manganites
Research Article | Physical Review B 70, 224424  (2004)
N. Rama, M. S. Ramachandra Rao, V. Sankaranarayanan, P. Majewski, S. Geprägs, M. Opel & R. Gross
Elektronendotierung und strukturelle Effekte in ferromagnetischen Doppelperowskiten
Master Thesis |
Geprägs, Stephan
Magnetoresistance and magnetic properties of the double perovskites
Research Article | ACTA PHYSICA POLONICA A 105, 7-26  (2004)
Philipp, JB; Majewski, P; Reisinger, D; Geprags, S; Opel, M; Erb, A; Alff, L; Gross, R
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