Zobrazeno 1 - 10
of 61
pro vyhledávání: '"Atxitia, Unai"'
Autor:
Rózsa, Levente, Atxitia, Unai
Publikováno v:
Phys. Rev. Research 5 (2023) 023139
The temperature dependence of mesoscopic spin-model parameters is derived in two-sublattice antiferromagnetically aligned systems based on Green's function theory. It is found that transversal spin correlations decrease the anisotropy terms while inc
Externí odkaz:
http://arxiv.org/abs/2211.10204
Autor:
Griepe, Theodor, Atxitia, Unai
Despite intense experimental effort, theoretical proposals and modeling approaches, a lack of consensus exists about the intrinsic mechanisms driving ultrafast magnetization dynamics in 3$d$ ferromagnets. In this work, we find evidence of electron-ph
Externí odkaz:
http://arxiv.org/abs/2210.15269
Autor:
Jenkins, Sarah, Rozsa, Levente, Atxitia, Unai, Evans, Richard F. L., Novoselov, Kostya S., Santos, Elton J. G.
The Mermin-Wagner theorem states that long-range magnetic order does not exist in one- or two-dimensional (2D) isotropic magnets with short-ranged interactions. The theorem has been a milestone in magnetism and has been driving the research of recent
Externí odkaz:
http://arxiv.org/abs/2210.04830
Autor:
Lee, Sang-Eun, Windsor, Yoav William, Fedorov, Alexander, Kliemt, Kristin, Krellner, Cornelius, Schüßler-Langeheine, Christian, Pontius, Niko, Wolf, Martin, Atxitia, Unai, Vyalikh, Denis V., Rettig, Laurenz
The ultrafast manipulation of magnetic order due to optical excitation is governed by the intricate flow of energy and momentum between the electron, lattice and spin subsystems. While various models are commonly employed to describe these dynamics,
Externí odkaz:
http://arxiv.org/abs/2207.00789
Autor:
Jakobs, Florian, Atxitia, Unai
We bridge an essential knowledge gap on the understanding of all-optical ultrafast switching in ferrimagnets; namely, the connection between atomistic spin dynamics methods and macroscopic phenomenological models. All-optical switching of the magneti
Externí odkaz:
http://arxiv.org/abs/2206.13593
Antiferromagnets (AFMs) are strong candidates for the future spintronic and memory applications largely because of their inherently fast dynamics and lack of stray fields, with Mn2Au being one of the most promising. For the numerical modelling of mag
Externí odkaz:
http://arxiv.org/abs/2206.08625
Autor:
Jakobs, Florian, Atxitia, Unai
We theoretically demonstrate that the ultrafast magnetic order dynamics in antiferromagnets is exchange-enhanced in comparison to their ferromagnetic counterparts. We provide an equation of motion for the magnetic order dynamics validated by computer
Externí odkaz:
http://arxiv.org/abs/2206.05783
Autor:
Jakobs, Florian, Atxitia, Unai
Single-pulse switching has been experimentally demonstrated in ferrimagnetic GdFeCo and Mn$_2$Ru$_x$Ga alloys. Complete understanding of single-pulse switching is missing due to the lack of an established theory accurately describing the transition t
Externí odkaz:
http://arxiv.org/abs/2201.09067
Autor:
Zahn, Daniela, Jakobs, Florian, Seiler, Hélène, Butcher, Tim A., Engel, Dieter, Vorberger, Jan, Atxitia, Unai, Windsor, Yoav William, Ernstorfer, Ralph
Publikováno v:
Physical Review Research 4 (1), 013104 (2022)
Ultrafast magnetization dynamics are governed by energy flow between electronic, magnetic, and lattice degrees of freedom. A quantitative understanding of these dynamics must be based on a model that agrees with experimental results for all three sub
Externí odkaz:
http://arxiv.org/abs/2110.00525
Autor:
Barker, Joseph, Atxitia, Unai
In this review we introduce computer modelling and simulation techniques which are used for ferrimagnetic materials. We focus on models where thermal effects are accounted for, atomistic spin dynamics and finite temperature macrospin approaches. We s
Externí odkaz:
http://arxiv.org/abs/2102.11004