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 Eisebitt +2 more
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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 mechanism in half-metallic Heusler alloy thin films controlled by the Fermi level [PDF]
Physical Review B, 2020 The electronic band structure-controlled ultrafast demagnetization mechanism in Co2FexMn1-xSi Heusler alloy is underpinned by systematic variation of composition.
Anjan Barman +2 more
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Element-resolved evidence of superdiffusive spin current arising from ultrafast demagnetization process [PDF]
Physical Review B, 2023 Using element-specific measurements of the ultrafast demagnetization of Ru/Fe65Co35 hetero-structures, we show that Ru can exhibit a significant magnetic contrast (3% asymmetry) resulting from ultrafast spin currents emanating from the demagnetization ...
Rahul Gupta +2 more
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Ultrafast demagnetization of Co2MnSi1–xAlx Heusler compounds using terahertz and infrared light [PDF]
Physical Review B, 2023 International audienceWe investigate the ultrafast demagnetization in Co 2 MnSi 1-x Al x quaternary Heusler compounds induced by terahertz (THz) and infrared (IR) pulses.
Stéphane Mangin, Claudia de Melo
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Magnetic entropy dynamics in ultrafast demagnetization
Journal of Physics: Condensed Matter, 2020Abstract 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
openaire +2 more sources
Near- and mid-infrared excitation of ultrafast demagnetization in a cobalt multilayer system [PDF]
Physical Review BIn the last few decades, ultrafast demagnetization elicited by ultrashort laser pulses has been the subject of a large body of work that aims to better understand and control this phenomenon.
Emmanuelle Jal +2 more
exaly +2 more sources
Ultrafast demagnetization in ferromagnetic InMnAs
2005 Quantum Electronics and Laser Science Conference, 2005We 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 +4 more
openaire +1 more source
Laser-Induced Ultrafast Demagnetization in Ferromagnetic Metals
Physical Review Letters, 2000The 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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Explaining the paradoxical diversity of ultrafast laser-induced demagnetization
Nature Materials, 2009Pulsed-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. +7 more
openaire +4 more sources