Results 11 to 20 of about 1,236 (182)

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, Agne Åberg Larsson, Carl Davies   +2 more
exaly   +8 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, Jakob Walowski, Markus Münzenberg, Stefan Maat, Matthew J. Carey, Jeffrey R. Childress, Claudia Mewes, Daniel Ebke, Volker Drewello, Günter Reiss, Andy Thomas   +10 more
doaj   +6 more sources

Indirect excitation of ultrafast demagnetization. [PDF]

Sci Rep, 2016
AbstractDoes the excitation of ultrafast magnetization require direct interaction between the photons of the optical pump pulse and the magnetic layer? Here, we demonstrate unambiguously that this is not the case. For this we have studied the magnetization dynamics of a ferromagnetic cobalt/palladium multilayer capped by an IR-opaque aluminum layer ...
Vodungbo B, Tudu B, Perron J, Delaunay R, Müller L, Müller L, Berntsen MH, Grübel G, Malinowski G, Weier C, Gautier J, Lambert G, Zeitoun P, Gutt C, Jal E, Reid AH, Granitzka PW, Jaouen N, Dakovski GL, Moeller S, Minitti MP, Mitra A, Carron S, Pfau B, von Korff Schmising C, Schneider M, Eisebitt S, Lüning J.   +27 more
europepmc   +14 more sources

Ultrafast Demagnetization Through Femtosecond Generation of Non‐Thermal Magnons [PDF]

Advanced Physics Research
Ultrafast laser excitation of ferromagnetic metals gives rise to correlated, highly non‐equilibrium dynamics of electrons, spins and lattice, which are, however, poorly described by the widely‐used three‐temperature model.
Markus Weißenhofer, Peter M. Oppeneer
doaj   +8 more sources

Ultrafast demagnetization in a ferrimagnet under electromagnetic field funneling. [PDF]

Nanoscale, 2021
Bottom-up produced optical ring-shaped Ag nanoantennas efficiently funnel electromagnetic field of a femtosecond-pulsed laser light into a ferrimagnetic TbCo nanofilm at plasmon resonance. This leads to the TbCo demagnetization at the nanoscale.
Mishra K, Ciuciulkaite A, Zapata-Herrera M, Vavassori P, Kapaklis V, Rasing T, Dmitriev A, Kimel A, Kirilyuk A.   +8 more
europepmc   +9 more sources

Electric current induced ultrafast demagnetization [PDF]

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, Yang, Yang, Gorchon, Jon, Lambert, Charles-Henri, Salahuddin, Sayeef, Bokor, Jeffrey   +5 more
openaire   +7 more sources

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, Wu, Jing, Liu, Tao, Zou, Xiao, Cai, Jianwang, Chantrell, Roy William, Xu, Yongbing   +6 more
openaire   +4 more sources

Ultrafast spin transport as key to femtosecond demagnetization [PDF]

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
openaire   +4 more sources

Structural dynamics during laser-induced ultrafast demagnetization [PDF]

Physical Review B, 2017
The mechanism underlying femtosecond laser pulse induced ultrafast magnetization dynamics remains elusive despite two decades of intense research on this phenomenon. Most experiments focused so far on characterizing magnetization and charge carrier dynamics, while first direct measurements of structural dynamics during ultrafast demagnetization were ...
Jal, Emmanuelle, López-Flores, Victor, Pontius, Niko, Ferté, Tom, Bergeard, Nicolas, Boeglin, Christine, Vodungbo, Boris, Lüning, Jan, Jaouen, Nicolas   +8 more
openaire   +7 more sources

Ultrafast demagnetization and Gilbert damping in electrodeposited CoP film [PDF]

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
openaire   +3 more sources