T
Thomas Ostler
Researcher at Sheffield Hallam University
Publications - 57
Citations - 3302
Thomas Ostler is an academic researcher from Sheffield Hallam University. The author has contributed to research in topics: Magnetization & Ferrimagnetism. The author has an hindex of 20, co-authored 50 publications receiving 2472 citations. Previous affiliations of Thomas Ostler include University of York & University of Exeter.
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Journal ArticleDOI
Transient ferromagnetic-like state mediating ultrafast reversal of antiferromagnetically coupled spins
Ilie Radu,K. Vahaplar,Christian Stamm,Torsten Kachel,Niko Pontius,Hermann A. Dürr,Hermann A. Dürr,Thomas Ostler,Joseph Barker,Richard F. L. Evans,Roy W. Chantrell,Arata Tsukamoto,Arata Tsukamoto,Akiyoshi Itoh,Andrei Kirilyuk,Theo Rasing,Alexey Kimel +16 more
TL;DR: It is found that the ultrafast spin reversal in GdFeCo, where spins are coupled antiferromagnetically, occurs by way of a transient ferromagnetic-like state, which provides a concept for the possibility of manipulating magnetic order on the timescale of the exchange interaction.
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Atomistic spin model simulations of magnetic nanomaterials.
Richard F. L. Evans,W. J. Fan,P. Chureemart,Thomas Ostler,Matthew O. A. Ellis,Roy W. Chantrell +5 more
TL;DR: The key methods used in atomistic spin models are presented, which are then applied to a range of magnetic problems, and the parallelization strategies used enable the routine simulation of extended systems with full atomistic resolution.
Journal ArticleDOI
Ultrafast heating as a sufficient stimulus for magnetization reversal in a ferrimagnet.
Thomas Ostler,Joseph Barker,Richard F. L. Evans,Roy W. Chantrell,Unai Atxitia,Oksana Chubykalo-Fesenko,S. El Moussaoui,L. Le Guyader,E. Mengotti,Laura J. Heyderman,F. Nolting,Arata Tsukamoto,Akiyoshi Itoh,D. Afanasiev,Boris A. Ivanov,Alexandra M. Kalashnikova,K. Vahaplar,J.H. Mentink,Andrei Kirilyuk,Theo Rasing,Alexey Kimel +20 more
TL;DR: Numerically and experimentally a novel mechanism of deterministic magnetization reversal in a ferrimagnet driven by an ultrafast heating of the medium resulting from the absorption of a sub-picosecond laser pulse without the presence of a magnetic field is shown.
Journal ArticleDOI
Atomistic spin model simulations of magnetic nanomaterials
Richard F. L. Evans,W. J. Fan,P. Chureemart,Thomas Ostler,Matthew O. A. Ellis,Roy W. Chantrell +5 more
TL;DR: In this article, the key methods used in atomistic spin models are presented, which are then applied to a range of magnetic problems, including surface anisotropy, laser-induced spin dynamics, exchange bias, and mi-structural effects.
Journal ArticleDOI
Crystallographically amorphous ferrimagnetic alloys: Comparing a localized atomistic spin model with experiments
Thomas Ostler,Richard F. L. Evans,Roy W. Chantrell,Unai Atxitia,Oksana Chubykalo-Fesenko,Ilie Radu,Radu Abrudan,Florin Radu,Arata Tsukamoto,Akiyoshi Itoh,Andrei Kirilyuk,Theo Rasing,Alexey Kimel +12 more
TL;DR: In this paper, a computational model of crystallographically amorphous ferrimagnetic alloys using a stochastic Landau-Lifshitzitz-Gilbert equation of motion for atomistic spins and an atomistic spin Hamiltonian with Heisenberg exchange is presented.