Results 91 to 100 of about 406 (125)

Light-Induced Bimerons in a Chiral Magnet

Li Z, Zhu K, Rybakov F, Wang Z, Gao W, Sun S, Wang W, Li J, Tian H, Eriksson O, Yang H, Zhang Y, Kiselev N, Li J.   +13 more
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Magnetic entropy dynamics in ultrafast demagnetization

Journal of Physics: Condensed Matter, 2020
Abstract A double polarization and temperature modulation configuration was applied to measure the magnetization and magnetic entropy dynamics in ultrafast demagnetization. Two magnetic properties, obtained by subtracting measurements made at opposite fields, have the same onset at small delays and different relaxations at large ...
S Goharshenasanesfahani, S Smadici
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Ultrafast demagnetization in ferromagnetic InMnAs

2005 Quantum Electronics and Laser Science Conference, 2005
We have studied demagnetization processes in ferromagnetic InMnAs induced by femtosecond mid-infrared laser pulses. At high pump fluences, complete magnetization quenching was observed within a few picoseconds, implying an ultrafast ferro- to paramagnetic phase transition.
J. Wang, C. Sun, J. Kono, A. Owia, H. Munekata   +4 more
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Laser-Induced Ultrafast Demagnetization in Ferromagnetic Metals

Physical Review Letters, 2000
The laser-induced femtosecond demagnetization in ferromagnetic metals is investigated theoretically. Different from the conventional nanosecond one, this ultrafast demagnetization is a cooperative effect of the external laser field and the internal spin-orbit coupling.
G P, Zhang, W, Hübner
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Ultrafast spin transport as key to femtosecond demagnetization

Nature Materials, 2013
Irradiating a ferromagnet with a femtosecond laser pulse is known to induce an ultrafast demagnetization within a few hundred femtoseconds. Here we demonstrate that direct laser irradiation is in fact not essential for ultrafast demagnetization, and that electron cascades caused by hot electron currents accomplish it very efficiently.
A. Eschenlohr, M. Battiato, P. Maldonado, N. Pontius, T. Kachel, K. Holldack, R. Mitzner, A. Föhlisch, P. M. Oppeneer, C. Stamm   +9 more
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Ultrafast demagnetization and Gilbert damping in electrodeposited CoP film

Journal of Materials Science, 2023
From portable electronics to high-performance computing, the requirement for miniaturized and high-efficiency power supply is ever-increasing. Soft magnetic material with higher resistivity and moderate anisotropy field can be considered as a promising candidate as core materials for high-frequency integrated magnetic passives leading to such on-chip ...
Soma Dutta, Arindam Samanta, Surya Narayan Panda, Saibal Roy, Anjan Barman   +4 more
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Substrate-Controlled Ultrafast Spin Injection and Demagnetization

Physical Review Applied, 2018
The ultrafast injection of spins and manipulation of magnetism by laser light offers a revolution in the speed of magnetic data storage. Here fully $a\phantom{\rule{0}{0ex}}b$ $i\phantom{\rule{0}{0ex}}n\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}t\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}o$ calculation show that the flow of spin current from a ...
Dewhurst, J. ; https://orcid.org/0000-0002-7218-078X, Shallcross, S., Gross, E., Sharma, S.   +3 more
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Explaining the paradoxical diversity of ultrafast laser-induced demagnetization

Nature Materials, 2009
Pulsed-laser-induced quenching of ferromagnetic order has intrigued researchers since pioneering works in the 1990s. It was reported that demagnetization in gadolinium proceeds within 100 ps, but three orders of magnitude faster in ferromagnetic transition metals such as nickel.
Koopmans, B., Malinowski, G., Dalla Longa, F., Steiauf, D., Fähnle, M., Roth, T., Cinchetti, M., Aeschlimann, M.   +7 more
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Spin currents during ultrafast demagnetization of ferromagnetic bilayers

Journal of Physics: Condensed Matter, 2017
Ultrafast spin currents induced by femtosecond laser excitation of ferromagnetic metals have been found to contribute to sub-picosecond demagnetization, and to cause a transient enhancement of the magnetization of the bottom Fe layer in a Ni/Ru/Fe layered structure.
Eschenlohr, A, Persichetti, L, Kachel, T, Gabureac, M, Gambardella, P, Stamm, C   +5 more
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Feedback Effect during Ultrafast Demagnetization Dynamics in Ferromagnets

Physical Review Letters, 2013
Motivated by the recent controversy about the importance of spin-flip scattering for ultrafast demagnetization in ferromagnets, we study the spin-dependent electron dynamics based on a dynamical Elliott-Yafet mechanism. The key improvement to earlier approaches is the use of a modified Stoner model with a dynamic exchange splitting between majority and
B Y, Mueller, A, Baral, S, Vollmar, M, Cinchetti, M, Aeschlimann, H C, Schneider, B, Rethfeld   +6 more
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