Results 11 to 20 of about 92,951 (162)

Indirect excitation of ultrafast demagnetization [PDF]

Scientific Reports, 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 ...
Boris, Vodungbo, Bharati, Tudu, Bahrati, Tudu, Jonathan, Perron, Renaud, Delaunay, Leonard, Müller, Magnus H, Berntsen, Gerhard, Grübel, Grégory, Malinowski, Christian, Weier, Julien, Gautier, Guillaume, Lambert, Philippe, Zeitoun, Christian, Gutt, Emmanuelle, Jal, Alexander H, Reid, Patrick W, Granitzka, Nicolas, Jaouen, Georgi L, Dakovski, Stefan, Moeller, Michael P, Minitti, Ankush, Mitra, Sebastian, Carron, Bastian, Pfau, Clemens, von Korff Schmising, Michael, Schneider, Stefan, Eisebitt, Jan, Lüning   +27 more
europepmc   +13 more sources

Spatiotemporal observation of surface plasmon polariton mediated ultrafast demagnetization [PDF]

Nature Communications
Surface plasmons offer a promising avenue in the pursuit of swift and localized manipulation of magnetism for advanced magnetic storage and information processing technology.
Yuzhu Fan, Gaolong Cao, Sheng Jiang, Johan Åkerman, Jonas Weissenrieder   +4 more
doaj   +3 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.
Kshiti Mishra, Agne Ciuciulkaite, Mario Zapata-Herrera, Paolo Vavassori, Vassilios Kapaklis, Theo Rasing, Alexandre Dmitriev, Alexey Kimel, Andrei Kirilyuk   +8 more
europepmc   +8 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   +7 more sources

Generation of Phonons With Angular Momentum During Ultrafast Demagnetization

Physical Review B
A major question in the field of femtosecond laser-induced demagnetization is whereto the angular momentum lost by the electrons is transferred. Recent ultrafast electron diffraction measurements [Tauchert , ] suggest that this angular momentum is transferred to the rotational motion of atoms on a sub-picosecond timescale, but a ...
M S Mrudul, Markus Weißenhofer, Peter M Oppeneer   +2 more
exaly   +5 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

Bayesian model comparison of type-I and type-II ultrafast demagnetization dynamics [PDF]

Structural Dynamics
Ultrafast demagnetization dynamics are often phenomenologically classified into type-I and type-II responses according to their temporal evolution following femtosecond laser excitation.
Hiroki Wadati, Tetsuro Ueno
doaj   +2 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, Yang, Yang, Gorchon, J., Lambert, Charles-Henri, Salahuddin, Sayeef, Bokor, Jeffrey   +5 more
openaire   +7 more sources

Spin current generated by thermally driven ultrafast demagnetization [PDF]

Nature Communications, 2014
Spin current is the key element for nanoscale spintronic devices. For ultrafast operation of such nano-devices, generation of spin current in picoseconds, a timescale that is difficult to achieve using electrical circuits, is highly desired. Here we show thermally driven ultrafast demagnetization of a perpendicular ferromagnet leads to spin ...
Gyung-Min, Choi, Byoung-Chul, Min, Kyung-Jin, Lee, David G, Cahill   +3 more
openaire   +3 more sources

Ultrafast demagnetization by hot electrons: Diffusion or super-diffusion? [PDF]

Structural Dynamics, 2016
Ultrafast demagnetization of ferromagnetic metals can be achieved by a heat pulse propagating in the electron gas of a non-magnetic metal layer, which absorbs a pump laser pulse.
G. Salvatella, R. Gort, K. Bühlmann, S. Däster, A. Vaterlaus, Y. Acremann   +5 more
doaj   +2 more sources