Results 1 to 10 of about 92,951 (162)
Ultrafast Demagnetization Control in Magnetophotonic Surface Crystals [PDF]
Nano Letters, 2022 Magnetic memory combining plasmonics and magnetism is poised to dramatically increase the bit density and energy efficiency of light-assisted ultrafast magnetic storage, thanks to nanoplasmon-driven enhancement and confinement of light. Here we devise a new path for that, simultaneously enabling light-driven bit downscaling, reduction of the required ...
Kshiti Mishra +2 more
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Nanoscale Confinement Enhances Ultrafast Demagnetization [PDF]
Advanced ScienceNanoscale miniaturization has revolutionized the field of spintronics by enabling exponential growth in areal bit density. A similar leap is also expected in device speeds through successfully harnessing femtosecond magnetization dynamics.
Yoav William Windsor +23 more
doaj +10 more sources
Ultrafast Dynamics of Demagnetization in FeMn/MnGa Bilayer Nanofilm Structures via Phonon Transport
Nanomaterials, 2022 Superdiffusive spin transport has been proposed as a new mechanism of ultrafast demagnetization in layered magnetic nanostructures and demonstrated experimentally.
Zhifeng Chen +2 more
exaly +4 more sources
Insights into Ultrafast Demagnetization in Pseudogap Half-Metals [PDF]
Physical Review X, 2012 Interest in femtosecond demagnetization dynamics was sparked by Bigot’s experiment in 1996, which unveiled the elementary mechanisms that relate the electrons’ temperature to their spin order.
Andreas Mann +10 more
doaj +6 more sources
Ultrafast demagnetization in iron: Separating effects by their nonlinearity [PDF]
Structural Dynamics, 2018 The laser-driven ultrafast demagnetization effect is one of the long-standing problems in solid-state physics. The time scale is given not only by the transfer of energy, but also by the transport of angular momentum away from the spin system.
Kevin Bühlmann +9 more
doaj +9 more sources
Three-stage ultrafast demagnetization dynamics in a monolayer ferromagnet [PDF]
Nature CommunicationsIntense laser pulses can be used to demagnetize a magnetic material on an extremely short timescale. While this ultrafast demagnetization offers the potential for new magneto-optical devices, it poses challenges in capturing coupled spin-electron and ...
Na Wu +4 more
doaj +4 more sources
Angular Momentum Flow During Ultrafast Demagnetization of a Ferrimagnet [PDF]
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.
Stefan Marcus Eisebitt +2 more
exaly +5 more sources
Polarized Phonons Carry Angular Momentum in Ultrafast Demagnetization [PDF]
Nature, 2022 Ultrafast electron diffraction from nickel reveals that ultrafast demagnetization and the associated Einstein-de Haas effect proceed via polarized phonons and atomic motions on circular trajectories.
Peter Baum +2 more
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Ultrafast Demagnetization of Iron Induced by Optical Versus Terahertz Pulses
Physical Review X, 2021 We study ultrafast magnetization quenching of ferromagnetic iron following excitation by an optical versus a terahertz pump pulse. While the optical pump (photon energy of 3.1 eV) induces a strongly nonthermal electron distribution, terahertz excitation (
Markus Münzenberg +2 more
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Results in PhysicsThe influence of spin–orbit coupling (SOC) on ultrafast demagnetization dynamics is still an obscure issue. Ferromagnetic ternary alloy film containing Platinum element has the advantage that SOC strength can be regulated flexibly by varying the ...
Zhifeng Chen, Shufa Li, Tianshu Lai
exaly +3 more sources