Steering of magnetic domain walls by single ultrashort laser pulses
| Autor: | Ahmet Unal, Matthias Bernien, Jan Vogel, Mustafa Erkovan, Wolfgang Kuch, Florian Kronast, Bin Zhang, Umut Parlak, Oliver Sandig, Yasser A. Shokr |
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| Přispěvatelé: | Fachbereich Physik, Freie Universität Berlin, Hellwan University, Cairo, Instituto de Engenharia de Sistemas e Computadores (INESC), Helmholtz-Zentrum Berlin für Materialien und Energie GmbH (HZB), Gebze Technical University, Micro et NanoMagnétisme (MNM ), Institut Néel (NEEL), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Magnetic domain
Magnetism 02 engineering and technology magnetic domains 01 natural sciences law.invention magnetization switching Emission Co law Driven 0103 physical sciences Multilayer Spin Seebeck effect 010306 general physics ComputingMilieux_MISCELLANEOUS Physics Microscopy Magnetic circular dichroism domain walls Optical-Constants Far-infrared laser Center (category theory) 021001 nanoscience & nanotechnology Laser ultrafast magnetization dynamics Domain wall (magnetism) Torque Metals [PHYS.COND.CM-GEN]Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other] magnetism [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] Atomic physics 0210 nano-technology Intensity (heat transfer) |
| Zdroj: | Physical Review B Physical Review B, American Physical Society, 2019, 99 (21), pp.214404. ⟨10.1103/PhysRevB.99.214404⟩ |
| ISSN: | 2469-9950 2469-9969 |
| Popis: | We present a magnetic domain-imaging study by x-ray magnetic circular dichroism photoelectron emission microscopy on a Co/Fe75Gd25 bilayer under exposure to single focused ultrashort (100 fs) infrared laser pulses. Magnetic domain walls experience a force in the intensity gradient of the laser pulses away from the center of the pulse, which can be used to steer domain walls to move in a certain direction. Maximum domain-wall displacements after individual laser pulses close to 1 mu m in zero external field are observed. Quantitative estimates show that electronic spin currents from the spin-dependent Seebeck effect are not strong enough to explain the effect, which we thus attribute to the torque exerted by magnons from the spin Seebeck effect that are reflected at the domain wall. DFGGerman Research Foundation (DFG)European Commission [Ku 1115/11-1, CRC/TRR 227]; Focus Area Nanoscale of Freie Universitat Berlin; MoHE through a GERLS scholarship; DAAD through a GERLS scholarship; PHC Procope [28558NE] Funding by the DFG (Grant No. Ku 1115/11-1 and Project No. A07 of CRC/TRR 227) and the Focus Area Nanoscale of Freie Universitat Berlin is gratefully acknowledged. Y.A.S. thanks the MoHE and the DAAD for financial support through a GERLS scholarship. J.V. acknowledges PHC Procope for a grant (Project No. 28558NE). We thank the HZB for the allocation of synchrotron radiation beam time and U. Atxitia, J. Berakdar, P. Brouwer, U. Nowak, and X. Waintal for fruitful discussions. |
| Databáze: | OpenAIRE |
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