Results 31 to 40 of about 92,951 (162)

Theory of Ultrafast Demagnetization after Femtosecond Laser Pulses [PDF]

Acta Physica Polonica A, 2015
Experimentally it has been found that a ferromagnetic metallic lm is strongly demagnetized within few hundred fs after exposure to a fs laser pulse. The theories of this ultrafast demagnetization are reviewed, especially the in uence of scatterings of the excited electrons at phonons and at magnons.
Fähnle, M., Illg, C., Haag, M., Teeny, N.   +3 more
openaire   +3 more sources

Tuning ultrafast demagnetization with ultrashort spin polarized currents in multi-sublattice ferrimagnets [PDF]

Nature Communications
Femtosecond laser pulses can be used to induce ultrafast changes of the magnetization in magnetic materials. Several microscopic mechanisms have been proposed to explain these observations, including the transport of ultrashort spin-polarized hot ...
Deeksha Gupta, Maryna Pankratova, Matthias Riepp, Manuel Pereiro, Biplab Sanyal, Soheil Ershadrad, Michel Hehn, Niko Pontius, Christian Schüßler-Langeheine, Radu Abrudan, Nicolas Bergeard, Anders Bergman, Olle Eriksson, Christine Boeglin   +13 more
doaj   +2 more sources

Ultrafast Demagnetization in Ferromagnetic Materials: Origins and Progress

Physics Reports
Published by Elsevier Science, North-Holland, Amsterdam [u.a.]
Derang Cao, Lining Pan, Meihong Liu
exaly   +4 more sources

Ultrafast demagnetization dynamics of 4f antiferromagnets [PDF]

12 pages, 12 ...
Pankratova, Maryna, Borisov, Vladislav, Thonig, Danny, Pathak, Rohit, Windsor, Yoav William, Rettig, Laurenz, Eriksson, Olle, Ernst, Arthur, Bergman, Anders   +8 more
openaire   +7 more sources

Magnetodynamics in exchange coupled composite magnets [PDF]

Scientific Reports
Tailoring magnetization using all-optical methods in exchange-coupled composite magnets holds significant scientific potential for advancing ultrafast magneto-optic devices.
Richa Bhardwaj, Antonio Caretta, Simone Laterza, Gabriele Coltrioli, Francesco Cautero, Amardeep Bharti, Kapil Dev, Pietro Parisse, Cinzia Di Giorgio, Subramanian Annapoorni, Asokan Kandasami, Marco Malvestuto   +11 more
doaj   +2 more sources

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, E Hohenstein, R Judge, S Smadici   +3 more
openaire   +3 more sources

Lattice dynamics and ultrafast energy flow between electrons, spins, and phonons in a 3d ferromagnet

Physical Review Research, 2021
The ultrafast dynamics of magnetic order in a ferromagnet are governed by the interplay between electronic, magnetic, and lattice degrees of freedom. In order to obtain a microscopic understanding of ultrafast demagnetization, information on the response
Daniela Zahn, Florian Jakobs, Yoav William Windsor, Hélène Seiler, Thomas Vasileiadis, Tim A. Butcher, Yingpeng Qi, Dieter Engel, Unai Atxitia, Jan Vorberger, Ralph Ernstorfer   +10 more
doaj   +1 more source

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
openaire   +3 more sources

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, Carva, Karel, Oppeneer, Peter M.   +2 more
openaire   +3 more sources

Spin current driven by ultrafast magnetization of FeRh

Nature Communications, 2023
Laser-induced ultrafast demagnetization is an important phenomenon that probes arguably the ultimate limits of the angular momentum dynamics in solid. Unfortunately, many aspects of the dynamics remain unclear except that the demagnetization transfers ...
Kyuhwe Kang, Hiroki Omura, Daniel Yesudas, OukJae Lee, Kyung-Jin Lee, Hyun-Woo Lee, Tomoyasu Taniyama, Gyung-Min Choi   +7 more
doaj   +1 more source