Generation and detection of phase-coherent current-driven magnons in magnetic multilayers

M. Tsoi (), A. G. M. Jansen, J. Bass, W.-C. Chiang, V. Tsoi and P. Wyder
Additional contact information
M. Tsoi: Grenoble High Magnetic Field Laboratory, Max-Planck-Institut für Festkörperforschung and Centre National de la Recherche Scientifique, BP 166
A. G. M. Jansen: Grenoble High Magnetic Field Laboratory, Max-Planck-Institut für Festkörperforschung and Centre National de la Recherche Scientifique, BP 166
J. Bass: Michigan State University
W.-C. Chiang: Michigan State University
V. Tsoi: Institute of Solid State Physics RAS
P. Wyder: Grenoble High Magnetic Field Laboratory, Max-Planck-Institut für Festkörperforschung and Centre National de la Recherche Scientifique, BP 166

Nature, 2000, vol. 406, issue 6791, 46-48

Abstract: Abstract The magnetic state of a ferromagnet can affect the electrical transport properties of the material; for example, the relative orientation of the magnetic moments in magnetic multilayers1 underlies the phenomenon of giant magnetoresistance. The inverse effect—in which a large electrical current density can perturb the magnetic state of a multilayer—has been predicted2,3,4,5,6,7 and observed experimentally with point contacts8,9 and lithographically patterned samples10,11. Some of these observations were taken as indirect evidence for current-induced excitation of spin waves, or ‘magnons’. Here we probe directly the high-frequency behaviour and partial phase coherence of such current-induced excitations, by externally irradiating a point contact with microwaves. We determine the magnon spectrum and investigate how the magnon frequency and amplitude vary with the exciting current. Our observations support the feasibility of a spin-wave maser2 or ‘SWASER’ (spin-wave amplification by stimulated emission of radiation).

Date: 2000
References: Add references at CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.nature.com/articles/35017512 Abstract (text/html)
Access to the full text of the articles in this series is restricted.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:nature:v:406:y:2000:i:6791:d:10.1038_35017512

Ordering information: This journal article can be ordered from
https://www.nature.com/

DOI: 10.1038/35017512

Access Statistics for this article

Nature is currently edited by Magdalena Skipper

More articles in Nature from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().