Spin-Wave-Mode Coexistence on the Nanoscale: A Consequence of the Oersted-Field-Induced Asymmetric Energy Landscape
Artikel i vetenskaplig tidskrift, 2013

It has been argued that if multiple spin wave modes are competing for the same centrally located energy source, as in a nanocontact spin torque oscillator, that only one mode should survive in the steady state. Here, the experimental conditions necessary for mode coexistence are explored. Mode coexistence is facilitated by the local field asymmetries induced by the spatially inhomogeneous Oersted field, which leads to a physical separation of the modes, and is further promoted by spin wave localization at reduced applied field angles. Finally, both simulation and experiment reveal a low frequency signal consistent with the intermodulation of two coexistent modes.

transfer torque

nano-oscillators

excitation

Författare

Randy K. Dumas

Göteborgs universitet

Ezio Iacocca

Göteborgs universitet

Stefano Bonetti

S. R. Sani

S. M. Mohseni

A. Eklund

J. Persson

O. Heinonen

Johan Åkerman

Göteborgs universitet

Physical Review Letters

0031-9007 (ISSN) 1079-7114 (eISSN)

Vol. 110 25 artikel nr 257202-

Ämneskategorier

Den kondenserade materiens fysik

DOI

10.1103/PhysRevLett.110.257202