Results 11 to 20 of about 406 (125)
Angular Momentum Flow During Ultrafast Demagnetization of a Ferrimagnet
Physical Review Letters, 2019 One of the key processes setting the speed of the ultrafast magnetization phenomena is the angular momentum transfer from and into the spin system. However, the way the angular momentum flows during ultrafast demagnetization and magnetization switching phenomena remains elusive so far.
Martin Hennecke, Ilie Radu, R Abrudan
exaly +4 more sources
Ultrafast demagnetization in ferromagnetic materials: Origins and progress
Physics ReportsPublished by Elsevier Science, North-Holland, Amsterdam [u.a.]
Meihong Liu, Derang Cao
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Ultrafast demagnetization at high temperatures [PDF]
Journal of Physics: Condensed Matter, 2018 Abstract Time-resolved pump-probe measurements were made at variable heat accumulation in Co/Pd superlattices. Heat accumulation increases the baseline temperature and decreases the equilibrium magnetization. Transient ultrafast demagnetization first develops with higher fluence in parallel with strong equilibrium thermal spin ...
F Hoveyda +3 more
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Strong ultrafast demagnetization due to the intraband transitions
Journal of Physics: Condensed Matter, 2023 Abstract Demagnetization in ferromagnetic transition metals driven by a femtosecond laser pulse is a fundamental problem in solid state physics, and its understanding is essential to the development of spintronic devices. Ab initio calculation of time-dependent magnetic moment in the velocity gauge so far has not been successful in ...
Mitsuko Murakami, G P Zhang
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Superdiffusive Spin Transport as a Mechanism of Ultrafast Demagnetization [PDF]
Physical Review Letters, 2010 We propose a semi-classical model for femtosecond-laser induced demagnetization due to spin-polarized excited electron diffusion in the super-diffusive regime. Our approach treats the finite elapsed time and transport in space between multiple electronic collisions exactly, as well as the presence of several metal films in the sample.
Battiato, Marco +2 more
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Dual-Pump Manipulation of Ultrafast Demagnetization in TbFeCo [PDF]
Physical Review B, 2014 Laser-induced ultrafast demagnetization in TbFeCo has been studied with a dual-pumping system. Five different laser fluence combinations were applied at three different time intervals between two pump pulses. The experimental results are also compared with computational simulations using the atomistic model.
Cheng, Tuyuan +6 more
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Electric current induced ultrafast demagnetization
Physical Review B, 2017 We report the magnetic response of Co/Pt multilayers to picosecond electrical heating. Using photoconductive Auston switches, we generate electrical pulses with 5.5 picosecond duration and hundreds of pico-Joules to pass through Co/Pt multilayers. The electrical pulse heats the electrons in the Co/Pt multilayers and causes an ultrafast reduction in the
Wilson, Richard B +5 more
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Insights into Ultrafast Demagnetization in Pseudogap Half-Metals [PDF]
Physical Review X, 2012 17 pages, 4 figures, plus Supplementary ...
Mann, Andreas +10 more
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Spin Berry points as crucial for ultrafast demagnetization [PDF]
Modern Physics Letters B, 2021 Laser-induced ultrafast demagnetization has puzzled researchers around the world for over two decades. Intrinsic complexity in electronic, magnetic and phononic subsystems is difficult to understand microscopically. So far, it is not possible to explain demagnetization using a single mechanism, which suggests a crucial piece of information still ...
Zhang, G. P. +2 more
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Twisted light affects ultrafast demagnetization
, 2022 Irradiation with an ultrashort laser pulse can completely destroy the magnetic order of ferromagnetic thin films on the femtosecond timescale. This phenomenon holds great potential for ultrafast spintronics and information processing and is an active field of research.
Prinz, Eva +2 more
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