Magnon excitation by spin injection in thin Fe/Cr/Fe films
The technique of Brillouin light scattering is used to observe strong excitation of magnons in antiferromagnetically coupled trilayers of Fe/Cr/Fe at room temperature. The magnons are driven out of equilibrium by a microwave current applied in the trilayer through point contacts. The magnitude of the scattering intensity is investigated as a function of the magnon wave number and applied magnetic field. Confirming recent theoretical predictions, the observations provide strong evidence of electronic spin injection in the rf driving field.
Rezende
SM
Departamento de Fisica, Universidade Federal de Pernambuco, 50670-901 Recife-PE, Brazil.
de Aguiar FM
Lucena
MA
Azevedo
A