Ultrafast kinetics of the antiferromagnetic-ferromagnetic phase transition in FeRh.

Autor: Li G; Radboud University, Institute for Molecules and Materials, Heyendaalseweg 135, Nijmegen, The Netherlands. Qiao.Li@science.ru.nl., Medapalli R; Center for Memory and Recording Research, University of California, San Diego, La Jolla, San Diego, CA, 92093-0401, USA.; Department of Physics, Lancaster University, Bailrigg, Lancaster, LA1 4YW, UK., Mentink JH; Radboud University, Institute for Molecules and Materials, Heyendaalseweg 135, Nijmegen, The Netherlands., Mikhaylovskiy RV; Department of Physics, Lancaster University, Bailrigg, Lancaster, LA1 4YW, UK., Blank TGH; Radboud University, Institute for Molecules and Materials, Heyendaalseweg 135, Nijmegen, The Netherlands., Patel SKK; Center for Memory and Recording Research, University of California, San Diego, La Jolla, San Diego, CA, 92093-0401, USA., Zvezdin AK; Moscow Institute for Physics and Technology, 9 Institutskiy per., Dolgoprudny, Moscow Region, 141701, Russia., Rasing T; Radboud University, Institute for Molecules and Materials, Heyendaalseweg 135, Nijmegen, The Netherlands., Fullerton EE; Center for Memory and Recording Research, University of California, San Diego, La Jolla, San Diego, CA, 92093-0401, USA., Kimel AV; Radboud University, Institute for Molecules and Materials, Heyendaalseweg 135, Nijmegen, The Netherlands.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2022 May 30; Vol. 13 (1), pp. 2998. Date of Electronic Publication: 2022 May 30.
DOI: 10.1038/s41467-022-30591-2
Abstrakt: Understanding how fast short-range interactions build up long-range order is one of the most intriguing topics in condensed matter physics. FeRh is a test specimen for studying this problem in magnetism, where the microscopic spin-spin exchange interaction is ultimately responsible for either ferro- or antiferromagnetic macroscopic order. Femtosecond laser excitation can induce ferromagnetism in antiferromagnetic FeRh, but the mechanism and dynamics of this transition are topics of intense debates. Employing double-pump THz emission spectroscopy has enabled us to dramatically increase the temporal detection window of THz emission probes of transient states without sacrificing any loss of resolution or sensitivity. It allows us to study the kinetics of emergent ferromagnetism from the femtosecond up to the nanosecond timescales in FeRh/Pt bilayers. Our results strongly suggest a latency period between the initial pump-excitation and the emission of THz radiation by ferromagnetic nuclei.
(© 2022. The Author(s).)
Databáze: MEDLINE
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