Journal ArticleDOI
Direct observation of a propagating spin wave induced by spin-transfer torque
Marco Madami,Stefano Bonetti,Giancarlo Consolo,Silvia Tacchi,Giovanni Carlotti,Gianluca Gubbiotti,Fred Mancoff,Mazher Ahmed Yar,Johan Åkerman,Johan Åkerman +9 more
TLDR
This work directly observes a propagating spin wave launched from a spin torque oscillator with a nanoscale electrical contact into an extended Permalloy (nickel iron) film through the spin transfer torque effect, and shows that spin waves with tunable frequencies can propagate for several micrometres.Abstract:
Spin torque oscillators with nanoscale electrical contacts are able to produce coherent spin waves in extended magnetic films, and offer an attractive combination of electrical and magnetic field control, broadband operation, fast spin-wave frequency modulation, and the possibility of synchronizing multiple spin-wave injection sites. However, many potential applications rely on propagating (as opposed to localized) spin waves, and direct evidence for propagation has been lacking. Here, we directly observe a propagating spin wave launched from a spin torque oscillator with a nanoscale electrical contact into an extended Permalloy (nickel iron) film through the spin transfer torque effect. The data, obtained by wave-vector-resolved micro-focused Brillouin light scattering, show that spin waves with tunable frequencies can propagate for several micrometres. Micromagnetic simulations provide the theoretical support to quantitatively reproduce the results.read more
Citations
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Current-induced spin-orbit torques in ferromagnetic and antiferromagnetic systems
Aurelien Manchon,J. Železný,Ioan Mihai Miron,Tomas Jungwirth,Jairo Sinova,André Thiaville,Kevin Garello,Pietro Gambardella +7 more
TL;DR: In this paper, the authors acknowledge support from the EU FET Open RIA Grant No 766566, the Ministry of Education of the Czech Republic Grant No LM2015087 and LNSM-LNSpin.
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Magnon transistor for all-magnon data processing
TL;DR: It is demonstrated that the density of magnons flowing from the transistor’s source to its drain can be decreased three orders of magnitude by the injection of Magnon–magnon interactions into the transistor's gate.
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Spin-torque building blocks
TL;DR: By assembling magnetic nanodevices as building blocks with different functionalities, novel types of computing architecture can be envisaged, focus in particular on recent concepts such as magnonics and spintronic neural networks.
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Magnonic crystals for data processing
TL;DR: In this article, different approaches for the realization of static, reconfigurable, and dynamic magnonic crystals are presented along with a variety of novel wave phenomena discovered in these crystals.
Journal ArticleDOI
The 2014 Magnetism Roadmap
Robert Stamps,Stephan Breitkreutz,Johan Åkerman,Johan Åkerman,Andrii V. Chumak,Yoshichika Otani,Yoshichika Otani,Gerrit E. W. Bauer,Gerrit E. W. Bauer,Jan Ulrich Thiele,Martin Bowen,Sara A. Majetich,Mathias Kläui,Ioan Lucian Prejbeanu,Ioan Lucian Prejbeanu,Bernard Dieny,Bernard Dieny,Nora Dempsey,Burkard Hillebrands +18 more
TL;DR: This 2014 Magnetism Roadmap provides a view on several selected, currently very active innovative developments, each written by an expert in the field and addressing a specific subject, with strong emphasize on future potential.
References
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Current-driven excitation of magnetic multilayers
TL;DR: In this paper, a new mechanism was proposed for exciting the magnetic state of a ferromagnet, where a transfer of vectorial spin accompanied an electric current flowing perpendicular to two parallel magnetic films connected by a normal metallic spacer.
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Emission of spin waves by a magnetic multilayer traversed by a current.
TL;DR: In this paper, the interaction between spin waves and itinerant electrons is considerably enhanced in the vicinity of an interface between normal and ferromagnetic layers in metallic thin films, leading to a local increase of the Gilbert damping parameter which characterizes spin dynamics.
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Mutual phase-locking of microwave spin torque nano-oscillators
Shehzaad Kaka,Matthew R. Pufall,William H. Rippard,Thomas J. Silva,Stephen E. Russek,Jordan A. Katine +5 more
TL;DR: It is shown that two STNOs in close proximity mutually phase-lock—that is, they synchronize, which is a general tendency of interacting nonlinear oscillator systems.
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Excitation of spin waves by an electric current
TL;DR: In this article, the excitation of spin waves in an unbounded ferromagnetic film by a direct spin-polarized current distributed over a small area is treated macroscopically.
Journal ArticleDOI
Phase-locking in double-point-contact spin-transfer devices
TL;DR: It is shown that the magnetization oscillations induced by spin-transfer in two 80-nm-diameter giant-magnetoresistance point contacts in close proximity to each other can phase-lock into a single resonance over a frequency range from approximately <10 to >24 GHz for contact spacings of less than about ∼200 nm.