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Finite size effects on spin-torque driven ferromagnetic resonance in spin-valves with a Co/Ni synthetic free layer
- Source :
- J. Appl. Phys. 103, 07A502 (2008)
- Publication Year :
- 2007
-
Abstract
- 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.<br />Comment: 3 pages, 3 figures
Details
- Database :
- arXiv
- Journal :
- J. Appl. Phys. 103, 07A502 (2008)
- Publication Type :
- Report
- Accession number :
- edsarx.0712.0404
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1063/1.2832671