Chapter 2: Personnel. 2.1 Members of the group. Group leader: Senior scientists: Postdocs and long-term guest scientists: Ph.D. students: 2 Personnel

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1 Chapter 2: Personnel 2.1 Members of the group Group leader: Prof. Dr. Burkard Hillebrands Senior scientists: Dr. Andrii Chumak Dr. Andrés Conca Parra Dr. Britta Leven, Akad. Oberrätin Jun. Prof. Dr. Evangelos Papaioannou Dr. habil. Alexander Serga Dr. Vitaliy Vasyuchka s and long-term guest scientists: Dr. Milan Agrawal since 02/14 Dr. Florin Ciubotaru until 08/14 Dr. Benjamin Jungßeisch until 12/13 Akihiro Kirihara until 04/14 Dr. Roland Neb 02/14-08/14 Dr. Björn Obry until 08/14 Dr. Philipp Pirro since 07/14 Dr. Katrin Schultheiß until 12/13 Dr. Thomas Sebastian until 12/13 s: M.Sc. Milan Agrawal until 02/14 M.Sc. Dmytro Bozhko Dipl.-Phys. Thomas Brächer Dipl.-Phys. Peter Clausen Dipl.-Phys. Sascha Keller since 10/14 Dipl.-Phys. Thomas Langner Dipl.-Phys. Viktor Lauer Dipl.-Phys. Thomas Meyer Dipl.-Phys. Roland Neb until 02/14 M.Sc. Donata Passarello (IBM Research lab) Dipl.-Phys. Philipp Pirro until 07/14 M.Sc. Ana Ruiz Calaforra 7

2 Diploma Students: Tobias Fischer since 05/14 Frank Heussner since 01/14 Stefan Klingler since 11/13 Laura Mihalceanu since 07/14 Student Assistants: Tanita Eichert until 06/14 Lisa Gareis since 12/13 Moritz Geilen Jochen Greser Björn Heinz Philipp Jaeger Martin Kewenig since 10/14 Michael Schneider since 10/14 Matthias Schweizer Engineers and Technicians Dipl.-Ing. (FH) Dieter Weller Administration: Sibylle Müller Dr. Isabel Sattler 8

3 2.2 Visiting scientists, postdoctoral fellows and exchange students (sorted by date of Þrst arrival in our group) Akihiro Kirihara, NEC Corporation, Tsukuba Japan Akihiro Kirihara is a visiting researcher, belonging to Smart Energy Research Laboratories of NEC Corporation. In NEC, he works on the developmentof thermoelectric devices using the spin- Seebeck effect (SSE). He stayed in our group until mid of April and joined experimental projects related to the SSE and spin pumping. Robert L. Stamps, University of Glasgow United Kingdom Prof. Dr. Robert L. Stamps is a professor at Glasgow University and an internationally highly regarded expert in the theory of magnetization dynamics and magnetism at the nanoscale in general. We collaborate with him since more than 25 years. He visited our laboratory for six days to discuss new directions in magnon physics Boris Kalinikos, Department of Physical Electronics and Technology, St. Petersburg Electrotechnical University, St. Petersburg Russia The visit of Prof. Kalinikos has been performed in the frame of the German-Russian project "Coherent nonlinear spin-wave states in ferromagneticþms and ferromagnetic/ferroelectronic layered structures" (DFG RUS 113/644/0). We discussed our joint results on a width-modulated dynamic magnonic crystal. As well we Þnished the project report and worked on the preparation of a new cooperative project Yoichi Shiota, Osaka University, Osaka Japan Dr. Yoichi Shiota Þnished his PhD studies in the group of Prof. Y. Suzuki and is now a postdoc in National Institute of Advanced Industrial Science and Technology (AIST), Ibaraki, Japan. Our collaboration is long-standing and refers to the anisotropy-mediated coupling between magnetization dynamics and electric Þeld in multilayered structures. During this visit, we performed joint experimental studies of spin-wave generation by electric Þeld using Brillouin light scattering spectroscopy

4 YochiChika Otani, ISSP, The University of Tokyo and Center for Emergent Matter Science, RIKEN Japan Prof. Otani visited our group to participate in the PhD defense of Milan Agrawal as the second supervisor. During his stay, he delivered a talk about his cutting-edge research on the spin Hall effect. He enjoyed the PhD celebration function very much and wrote about it on his group web-page Aleksandra Trzaskowska, Adam Mickiewicz University, UAM, Poznan Poland In 2008 Dr. Aleksandra Trzaskowska worked with us six month in frame of her DAAD fellowship. During her current stay, which was supported by the Adam Mickiewicz University, Alexandra performed BLS measurements of phonon and magnon excitations in multilayered magnetic structures Andrei Slavin, Oakland University, Rochester, Michigan USA Prof. Slavin spend with us a few days fruitfully discussing the recent experimental results on magnon gases and condensates Benjamin Jungßeisch, Materials Science Division, Argonne National Laboratory, Argonne, Illinois USA Benjamin Jungßeisch has Þnished his PhD studies in our group and is now a postdoc at Argonne National Laboratories, USA. During his visit in Kaiserslautern we have spent some very useful days discussing the perspectives, trends and problems of the Þeld of magnon spintronics as well as perspectives for future joint studies Eiji Saitoh, Institute of Materials Research, Tohoku University, Sendai Japan Prof. Dr. Eiji Saitoh, a professor at Institute for Materials Research at Tohoku University, Sendai, Japan is an experimentalist in the Þeld of spin-caloric phenomena with excellent international reputation. We collaborate with him on the Þeld of magnon caloritronics. He visited us for three days to discuss results and new research ideas

5 Gennadii A. Melkov, National Taras Shevchenko University, University of Kyiv Ukraine This year the regular visit of Prof. Melkov to our group was supported by the Deutsche Forschungsgemeinschaft in the frame of the SFB/Transregio 49 Condensed Matter Systems with Variable Many-Body Interactions. During his stay Prof. Melkov was mainly working on different aspects of phonon-magnon interactions in parametrically and thermally driven magnetic insulators. Yaroslav Tserkovnyak, University of California (UCLA), Los Angeles USA Prof. Yaroslav Tserkovnyak worked with us on the theoretical description of our experimental results on the dynamics of Bose- Einstein magnon condensate in thermal gradients and on the enhanced Spin-Hall Effect voltage from the magnon Bose-Einstein condensate in YIG/Pt bilayers. Ken-ichi Uchida, Institute of Materials Research, Tohoku University, Sendai, and PRESTO, Japan Science and Technology Japan Assoc. Prof. Ken-ichi Uchida visited our group in the frame of our research collaboration. During his visit, we experimentally studied the magnonic transport in ferrimagnetic spin-wave waveguides treated using a laser micro-processing system, and we investigated interactions between magnons and plasmon resonances in hybrid structures. The combination of Brillouin light scattering spectroscopy and microwave technique was used in these investigations

6 2.3 Guest seminars Abdelmadjid Anane Robert L. Stamps Adekunle Adeyeye Yoichi Shiota Dr. Rolf Slatter YochiChika Otani Aleksandra Trzaskowska Uwe Hartmann Benjamin Jungßeisch Christoph Becker Unité Mixte de Physique CNRS/Thales, Palaiseau et Université de Paris-Sud, Orsay, France PLD grown thin YIG Þlms for magnonics, spintronics and more Special group seminar University of Glasgow, United Kingdom Dynamics of spin conþgurations and textures Special seminar National University of Singapore, Singapore ArtiÞcial ferromagnetic nanostructures: An experimental platform for magnonics Physics Kolloquium Osaka University, Osaka, Japan Spin dynamics excited by voltage-effect in ferromagnetic metals Special group seminar Sensitec GmbH, Mainz, Germany Wir stellen uns vor - Magnetische Mikro- und Nanotechnologie für robuste Sensorlösungen Special seminar ISSP, The University of Tokyo and Center for Emergent Matter Science, RIKEN, Japan Static and dynamic measurements of spin Hall effects Special group seminar Adam Mickiewicz University, UAM, Poznań, Poland Periodic nanostructures on silicon surfaces Special group seminar Universität des Saarlandes, Saarbrücken, Germany Giant Magnetoimpedance Physics Kolloquium Materials Science Division, Argonne National Laboratory, Argonne, Illinois, USA Spin pumping and inverse spin Hall effect in metallic ferromagnet structures Special seminar Institut für Laserphysik, Universität Hamburg, Germany High spin at low temperatures TR49 Kolloquium 12

7 Yaroslav Tserkovnyak Julian Hüser Yu-Ming Hung Ken-ichi Uchida University of California (UCLA), Los Angeles, USA Bosonic condensation and spin superßuidity in solid state Physics Kolloquium Institut für Theoretische Physik, Universität Münster, Germany Bose-Einstein condensation of magnons: A theoretical study of magnon-magnon and magnon-phonon interactions Special group seminar New York University, New York City, USA I Current-induced switching and properties of Ta/CoFeB/MgO for spin logic device II Investigation of spin pumping in YIG/Cu/Py using ferromagnetic resonance Special seminar Institute of Materials Research, Tohoku University, Sendai, and PRESTO, Japan Science and Technology, Japan 1. Experiments in Kaiserslautern 2. Experimental progress on spin Seebeck effect Special group seminar 13

8 2.4 Visits of group members at other laboratories Tobias Fischer Evangelos Papaioannou Lisa Gareis Thomas Meyer Department of Chemistry, University of Calgary, Alberta, Canada Host: Dr. Simon Trudel Uppsala Universitet, Uppsala, Sweden Host: Prof. Björgvin Hjörvarsson Center for Materials for Information Technology (MINT), University of Alabama, Tuscaloosa, USA Host: Prof. Dr. Tim Mewes Tohoku University, Sendai, Japan Host: Prof. Yasuo Ando 14

9 2.5 Group member photo gallery Dr. Milan Agrawal Dmytro Bozhko Thomas Brächer Dr. Andrii Chumak Senior scientist Dr. Florin Ciubotaru Peter Clausen Dr. Andrés Conca Parra Senior scientist Tanita Eichert Tobias Fischer Diploma student Lisa Gareis Moritz Geilen Jochen Greser 15

10 Björn Heinz Frank Heussner Diploma student Prof. Dr. Burkard Hillebrands Group leader Philipp Jaeger Dr. Benjamin Jungßeisch Sascha Keller Martin Kewenig Akihiro Kirihara Guest scientist Stefan Klingler Diploma student Thomas Langner Viktor Lauer Dr. Britta Leven Senior scientist 16

11 Thomas Meyer Laura Mihalceanu Diploma student Sibylle Müller Secretary Dr. Roland Neb Dr. Björn Obry JProf. Dr. Evangelos Papaioannou Senior scientist Donata Passarello Dr. Philipp Pirro Ana Ruiz Calaforra Dr. Isabel Sattler Administration Michael Schneider Dr. Katrin Schultheiß (née Vogt) 17

12 Matthias Schweizer Dr. Thomas Sebastian Dr. Alexander Serga Senior scientist Dr. Vitaliy Vasyuchka Senior scientist Dieter Weller Mechanical engineer 18