Nanoscale interface confinement of ultrafast spin transfer torque driving non-uniform spin dynamics

Autor: Ilya Razdolski, Alexandr Alekhin, Nikita Ilin, Jan P. Meyburg, Vladimir Roddatis, Detlef Diesing, Uwe Bovensiepen, Alexey Melnikov

Publikováno v: Nature Communications, Vol 8, Iss 1, Pp 1-5 (2017)

Fundamental understanding of ultrafast spin dynamics is crucial for spintronics applications. Here the authors demonstrate an ultrafast technique to explore the inhomogeneous THz spin dynamics in Fe/Au/Fe multilayers triggered by spin transfer torque

Externí odkaz: https://doaj.org/article/8b8d030ad2ab42b7a92fa0204f8a1e5a

Nondestructive Femtosecond Laser Lithography of Ni Nanocavities by Controlled Thermo-Mechanical Spallation at the Nanoscale

Autor: Vadim P. Veiko, Evgeny Modin, Dmitry S. Ivanov, Alexandr Alekhin, Alexey M. Lomonosov, Paolo Vavassori, Vasily V. Temnov, A. A. Samokhvalov

Publikováno v: Nano Letters
Nano Letters, American Chemical Society, 2020, ⟨10.1021/acs.nanolett.0c02574⟩

We present a new approach to femtosecond direct laser writing lithography to pattern nanocavities in ferromagnetic thin films. To demonstrate the concept we irradiated 300~nm thin nickel films by single intense femtosecond laser pulses through the gl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::92de9dff6c7499193fbaa08908a51d01
https://hal.archives-ouvertes.fr/hal-02988635/file/Nanoletters_Temnov_revised.pdf

Gilbert damping in NiFeGd compounds: Ferromagnetic resonance versus time-resolved spectroscopy

Autor: Vasily V. Temnov, Radu Abrudan, Michael Farle, Ralf Meckenstock, Alexandr Alekhin, T. Parpiiev, Ruslan Salikhov, Thomas Pezeril, Florin Radu, Denys Makarov, Hartmut Zabel

Publikováno v: Physical Review B: Condensed Matter and Materials Physics (1998-2015)
Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2019, 99 (10), ⟨10.1103/PhysRevB.99.104412⟩
Physical Review B 99(2019), 104412

Engineering the magnetic properties (Gilbert damping, saturation magnetization, exchange stiffness, and magnetic anisotropy) of multicomponent magnetic compounds plays a key role in fundamental magnetism and its applications. Here, we perform a syste

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::69636dee6b27ecd89429f3e66ac9bb59
https://hal.archives-ouvertes.fr/hal-02348842

Generation of exchange magnons in thin ferromagnetic films by ultrashort acoustic pulses

Autor: Anton V. Golov, Vasily V. Temnov, V. S. Vlasov, Igor V. Bychkov, Alexandr Alekhin, Dmitry A. Kuzmin, Leonid N. Kotov, Valentin Besse

Publikováno v: Journal of Magnetism and Magnetic Materials
Journal of Magnetism and Magnetic Materials, Elsevier, 2020, 502, pp.166320. ⟨10.1016/j.jmmm.2019.166320⟩

International audience; We investigate generation of exchange magnons by ultrashort, picosecond acoustic pulses propagating through ferromagnetic thin films. Using the Landau-Lifshitz-Gilbert equations we derive the dispersion relation for exchange m

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::106ee7c63b1229c2987975ebf1847224
https://doi.org/10.1016/j.jmmm.2019.166320

Femtosecond Spin Current Pulses Generated by the Nonthermal Spin-Dependent Seebeck Effect and Interacting with Ferromagnets in Spin Valves

Autor: Alexey Melnikov, Stefano Sanvito, Uwe Bovensiepen, Detlef Diesing, Jan Philipp Meyburg, Alexandr Alekhin, Ilya Razdolski, Vladimir Roddatis, Maria Stamenova, Ivan Rungger, Nikita Ilin

Publikováno v: Physical Review Letters

Using the sensitivity of magneto-induced second harmonic generation to spin currents (SC), we demonstrate in Fe/Au/Fe/MgO(001) pseudo spin valves the generation of 250 fs-long SC pulses. Their temporal profile indicates that superdiffusive hot electr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::021a31bae21bfa98dcd7144616c20485
https://gfzpublic.gfz-potsdam.de/pubman/item/item_4693893