Perspective: Ultrafast magnetism and THz spintronics
Jakob Walowski,Markus Münzenberg +1 more
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In this article, the authors review the need for multiscale modeling to address processes starting from electronic excitation of the spin system on the picometer length scale and sub-femtosecond time scale, and towards the modeling of ultrafast phase transitions that altogether determine the response time of the ferromagnetic system.Abstract:
This year the discovery of femtosecond demagnetization by laser pulses is 20 years old. For the first time this milestone work by Bigot and coworkers gave insight in a very direct way into the time scales of microscopic interactions that connect the spin and electron system. While intense discussions in the field were fueled by the complexity of the processes in the past, it now became evident that it is a puzzle of many different parts. Rather than giving an overview that has been presented in previous reviews on ultrafast processes in ferromagnets, this perspective will show that with our current depth of knowledge the first real applications are on their way: THz spintronics and all-optical spin manipulation are becoming more and more feasible. The aim of this perspective is to point out where we can connect the different puzzle pieces of understanding gathered over 20 years to develop novel applications. based on many observations in a large number of experiments. Differences in the theoretical models arise from the localized and delocalized nature of ferromagnetism. Transport effects are intrinsically non-local in spintronic devices and at interfaces. We review the need for multiscale modeling to address processes starting from electronic excitation of the spin system on the picometer length scale and sub-femtosecond time scale, to spin wave generation, and towards the modeling of ultrafast phase transitions that altogether determine the response time of the ferromagnetic system. Today, our current understanding gives rise to the first real applications of ultrafast spin physics for ultrafast magnetism control: THz spintronic devices. This makes the field of ultrafast spin-dynamics an emerging topic open for many researchers right now.read more
Citations
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Journal ArticleDOI
Opportunities and challenges for spintronics in the microelectronics industry
Bernard Dieny,Ioan Lucian Prejbeanu,Kevin Garello,Pietro Gambardella,Paulo P. Freitas,R. Lehndorff,Wolfgang Raberg,Ursula Ebels,Sergej O. Demokritov,Johan Åkerman,Johan Åkerman,Alina M. Deac,Philipp Pirro,Christoph Adelmann,Abdelmadjid Anane,Andrii V. Chumak,Andrii V. Chumak,Atsufumi Hirohata,Stéphane Mangin,Sergio O. Valenzuela,Sergio O. Valenzuela,M. Cengiz Onbaşlı,Massimiliano d'Aquino,Guillaume Prenat,Giovanni Finocchio,Luis Lopez-Diaz,Roy W. Chantrell,Oksana Chubykalo-Fesenko,P. Bortolotti +28 more
TL;DR: In this article, the potential of spintronics in four key areas of application (memory, sensors, microwave devices, and logic devices) is examined and the challenges that need to be addressed in order to integrate spintronic materials and functionalities into mainstream microelectronic platforms.
Journal ArticleDOI
The 2017 Magnetism Roadmap
D. Sander,Sergio O. Valenzuela,Sergio O. Valenzuela,Denys Makarov,Christopher H. Marrows,Eric E. Fullerton,Peter Fischer,Peter Fischer,Jeffrey McCord,Paolo Vavassori,Stéphane Mangin,Philipp Pirro,Burkard Hillebrands,Andrew D. Kent,Tomas Jungwirth,Tomas Jungwirth,Oliver Gutfleisch,CheolGi Kim,Andreas Berger +18 more
TL;DR: The 2017 Magnetism Roadmap as mentioned in this paper is the most recent edition of the magnetism roadmap, which is intended to provide a reference point and guideline for emerging research directions in modern magnetism.
Journal ArticleDOI
Light-wave dynamic control of magnetism
Florian Siegrist,Florian Siegrist,J. A. Gessner,J. A. Gessner,Marcus Ossiander,Christian Denker,Yi-Ping Chang,Malte Schröder,Alexander Guggenmos,Alexander Guggenmos,Yang Cui,Jakob Walowski,Ulrike Martens,J. K. Dewhurst,Ulf Kleineberg,Ulf Kleineberg,Markus Münzenberg,Sangeeta Sharma,Martin Schultze,Martin Schultze +19 more
TL;DR: This study unveils light-field coherent control of spin dynamics and macroscopic magnetic moments in the initial non-dissipative temporal regime and establishes optical frequencies as the speed limit of future coherent spintronic applications, spin transistors and data storage media.
Journal ArticleDOI
Magnetisation switching of FePt nanoparticle recording medium by femtosecond laser pulses
Robin John,Marco Berritta,Denise Hinzke,Cai Müller,T. Santos,Henning Ulrichs,P. Nieves,P. Nieves,Jakob Walowski,Ritwik Mondal,Oksana Chubykalo-Fesenko,Jeffrey McCord,Peter M. Oppeneer,Ulrich Nowak,Markus Münzenberg +14 more
TL;DR: A complete multiscale model is developed which allows us to optimize the number of laser shots needed to switch the magnetisation of high anisotropy FePt nanoparticles and concludes that only angular momentum induced optically by the inverse Faraday effect will provide switching with one single femtosecond laser pulse.
Journal ArticleDOI
Broadband Terahertz Generation via the Interface Inverse Rashba-Edelstein Effect.
C. Zhou,Yun Liu,Yun Liu,Zuowei Wang,Shaojie Ma,M. W. Jia,Ruqian Wu,Ruqian Wu,Lei Zhou,Wei Zhang,Mengkun Liu,Yizheng Wu,Jingbo Qi +12 more
TL;DR: In this paper, the symmetry of the interface inverse Rashba-Edelstein effect was exploited to obtain a controllable terahertz (THz) radiation from metallic heterostructures following photoexcitation.
References
More filters
Journal ArticleDOI
Giant magnetoresistance of (001)Fe/(001)Cr magnetic superlattices.
Mario Norberto Baibich,J. M. Broto,Albert Fert,F. Nguyen Van Dau,Frédéric Petroff,P. Etienne,G. Creuzet,A. Friederich,Jean Chazelas +8 more
TL;DR: This work ascribes this giant magnetoresistance of (001)Fe/(001)Cr superlattices prepared by molecularbeam epitaxy to spin-dependent transmission of the conduction electrons between Fe layers through Cr layers.
Journal ArticleDOI
The random walk's guide to anomalous diffusion: a fractional dynamics approach
Ralf Metzler,Joseph Klafter +1 more
TL;DR: Fractional kinetic equations of the diffusion, diffusion-advection, and Fokker-Planck type are presented as a useful approach for the description of transport dynamics in complex systems which are governed by anomalous diffusion and non-exponential relaxation patterns.
Journal ArticleDOI
Cutting-edge terahertz technology
TL;DR: An overview of the status of the terahertz technology, its uses and its future prospects are presented in this article, with a focus on the use of the waveband in a wide range of applications.
Journal ArticleDOI
Zur Quantentheorie der Molekeln
Max Born,Werner Heisenberg +1 more
TL;DR: In der Anwendung der Quantentheorie auf die Molekeln kann man folgende Entwicklungsstufen unterscheiden: Das erste Stadium1) ersetzt die zweiatomige Molekel durch das Hantelmodell, das als einfacher „Rotator“ behandelt wird as discussed by the authors.
Journal ArticleDOI
Spin-torque switching with the giant spin hall effect of tantalum
TL;DR: In this paper, a giant spin Hall effect (SHE) in β-tantalum was shown to generate spin currents intense enough to induce spin-torque switching of ferromagnets at room temperature.
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