Nonmonotonic aftereffect measurements in perpendicular synthetic ferrimagnets
| Autor: | Jieyi Liu, Carlos V. Landauro, T. Fache, H.S. Tarazona, Stéphane Mangin, Juan-Carlos Rojas-Sánchez, Sébastien Petit-Watelot, R. B. Morgunov, Matthew Applegate, J. Quispe-Marcatoma, G. L’vova, Crispin H. W. Barnes |
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| Přispěvatelé: | Applegate, Matthew [0000-0002-3302-0636], Barnes, Crispin [0000-0001-7337-7245], Apollo - University of Cambridge Repository, Institut Jean Lamour (IJL), Université de Lorraine (UL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Universidad Nacional Mayor de San Marcos (UNMSM), Cavendish Laboratory, University of Cambridge [UK] (CAM), Tambov State Technical University (TSTU), IMPACT N4S, ANR-15-IDEX-0004,LUE,Isite LUE(2015) |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Kerr effect Condensed matter physics Nucleation 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Magnetic field Magnetization Metastability 0103 physical sciences Microscopy Perpendicular Magnetic relaxation [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat] 010306 general physics 0210 nano-technology 51 Physical Sciences |
| Zdroj: | Physical Review B: Condensed Matter and Materials Physics (1998-2015) Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2018, 98 (6), pp.064410. ⟨10.1103/physrevb.98.064410⟩ |
| ISSN: | 2469-9969 2469-9950 1098-0121 1550-235X |
| DOI: | 10.1103/physrevb.98.064410 |
| Popis: | International audience; Aftereffect measurements have been performed on synthetic ferrimagnets showing strong perpendicular magnetic anisotropy, namely (Co/Pt)/Ir/(Co/Pt), by measuring the magnetization of the sample as a function of time for several different applied magnetic fields. Unexpected magnetic relaxation has been observed. Indeed, for some particular applied magnetic fields, the magnetization as a function of time first plummets and then increases. This nonmonotonic aftereffect can be understood by considering the possible magnetic states and the transitions between those states. This understanding has been confirmed and detailed using magneto-optical Kerr effect (MOKE) microscopy. Indeed, the measurements show nucleation and propagation of a transient metastable magnetic configuration. Furthermore, we were able to obtain a good qualitative agreement between a simple one-dimensional model and the experimental observation. We could strongly support the hypothesis that this peculiar nonmonotonic behavior could be a very general feature that should be observed in any antiferromagnetically coupled system (synthetic ferrimagnets, synthetic antiferromagnets) with perpendicular magnetic anisotropy. |
| Databáze: | OpenAIRE |
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