Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2007-12-03
J. Appl. Phys. 103, 07A502 (2008)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
3 pages, 3 figures
Scientific paper
10.1063/1.2832671
Spin-torque driven ferromagnetic resonance (ST-FMR) is used to study magnetic excitations in Co/Ni synthetic layers confined in nanojunctions. Field swept ST-FMR measurements were conducted with a magnetic field applied perpendicular to the layer surface. The resonance lines were measured under low amplitude excitation in a linear response regime. The resulting resonance fields were compared with those obtained using conventional rf field driven FMR on extended films with the same Co/Ni layer structure. A lower resonance field is found in confined structures. The effect of both dipolar fields acting on the Co/Ni layer emanating from other magnetic layers in the device and finite size effects on the spin wave spectrum are discussed.
Beaujour J-M. L.
Chen Wei
Kent Andrew D.
Loubens Grégoire de
Sun Jin-Zuo
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