Title :
Nonlinear Ferromagnetic Resonance in Nanostructures Having Discrete Spectrum of Spin-Wave Modes
Author :
Melkov, G.A. ; Slobodianiuk, D.V. ; Tiberkevich, V.S. ; de Loubens, G. ; Klein, O. ; Slavin, A.N.
Author_Institution :
Taras Shevchenko Nat. Univ. of Kyiv, Kiev, Ukraine
Abstract :
Nonlinear ferromagnetic resonance (NFMR) at the nanoscale differs from the same phenomenon in bulk magnetic samples due to the nanosize-related discreteness of the spin wave spectrum. Because of the spectrum discreteness, the conservation laws for multiwave parametric interaction processes cannot be fulfilled exactly and become nonresonant. The presence of the nonresonant parametric processes in a strongly driven magnetic nanosystem can be detected experimentally as distortions on the NFMR curve caused by the nonresonant excitation of spin wave modes.
Keywords :
ferromagnetic resonance; nanomagnetics; spin waves; NFMR curve; bulk magnetic samples; conservation laws; discrete spectrum; multiwave parametric interaction process; nanosize-related discreteness; nanostructures; nonlinear ferromagnetic resonance; nonresonant excitation; nonresonant parametric process; spectrum discreteness; spin wave spectrum; spin-wave modes; strongly driven magnetic nanosystem; Damping; Magnetic resonance; Magnetic separation; Magnetomechanical effects; Nanoscale devices; Saturation magnetization; Nanomagnetics; nonlinear ferromagnetic resonance; spin waves;
Journal_Title :
Magnetics Letters, IEEE
DOI :
10.1109/LMAG.2013.2278682
