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Engineered materials for all-optical helicity-dependent magnetic switching

Abstract : The possibility of manipulating magnetic systems without applied magnetic fields have attracted growing attention over the past fifteen years. The low-power manipulation of the magnetization, preferably at ultrashort timescales, has become a fundamental challenge with implications for future magnetic information memory and storage technologies. Here we explore the optical manipulation of the magnetization in engineered magnetic materials. We demonstrate that all-optical helicity-dependent switching (AO-HDS) can be observed not only in selected rare earth-transition metal (RE-TM) alloy films but also in a much broader variety of materials, including RE-TMalloys, multilayers and heterostructures. We further show that RE-free Co-Ir-based synthetic ferrimagnetic heterostructures designed to mimic the magnetic properties of RE-TM alloys also exhibit AO-HDS. These results challenge present theories of AO-HDS and provide a pathway to engineering materials for future applications based on all-optical control of magnetic order.
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https://hal.archives-ouvertes.fr/hal-01282629
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Submitted on : Friday, March 4, 2016 - 9:35:36 AM
Last modification on : Monday, April 6, 2020 - 2:44:03 PM

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Stéphane Mangin, M. Gottwald, C-H. Lambert, D. Steil, V. Uhlir, et al.. Engineered materials for all-optical helicity-dependent magnetic switching. Nature Materials, Nature Publishing Group, 2014, 13 (3), pp.287-293. ⟨10.1038/NMAT3864⟩. ⟨hal-01282629⟩

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