Angular dependence of ferromagnetic resonance measurements in exchange coupled Ni sub(80)Fe sub(20)/NiO bilayers

Angular dependence of ferromagnetic resonance measurements in exchange coupled Ni sub(80)Fe sub(20)/NiO bilayers

We investigate the angular dependence of the ferromagnetic resonance (FMR) frequency in a Ni sub(80)Fe sub(20)/NiO bilayer for varied external magnetic fields by means of broadband microwave absorption spectroscopy. The dispersion curves of the FMR frequencies exhibit an angular-dependent low-field...

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Veröffentlicht in:Journal of physics. D, Applied physics Applied physics, 2013-05, Vol.46 (20), p.205002-1-5
Hauptverfasser: Grenda, NHG, Hyde, P A, Gui, Y S, Wismayer, M P, Jung, JDA, Hu, C-M, Southern, B W, Lin, K-W
Format: Artikel
Sprache:eng
Schlagworte:
Antiferromagnetism
Broadband
Dispersions
Ferromagnetic resonance
Ferromagnetism
Magnetic fields
Mathematical models
Microwave absorption
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Zusammenfassung:We investigate the angular dependence of the ferromagnetic resonance (FMR) frequency in a Ni sub(80)Fe sub(20)/NiO bilayer for varied external magnetic fields by means of broadband microwave absorption spectroscopy. The dispersion curves of the FMR frequencies exhibit an angular-dependent low-field behaviour not predicted by current ferromagnetic/antiferromagnetic interface models. Our experimental data can be modelled using a single domain approach assuming that NiO introduces anisotropies at the interface.
ISSN:0022-3727
DOI:10.1088/0022-3727/46/20/205002