Parallel ferromagnetic resonance and spin-wave excitation in exchange-biased NiFe/IrMn bilayers

Marcos Antonio De Sousa, Fernando Pelegrini, Willian Alayo, Justiniano Quispe-Marcatoma, Elisa Baggio-Saitovitch

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

Ferromagnetic Resonance study of sputtered Ru(7 nm)/NiFe(t FM)/IrMn(6 nm)/Ru(5 nm) exchange-biased bilayers at X and Q-band microwave frequencies reveals the excitation of spin-wave and NiFe resonance modes. Angular variations of the in-plane resonance fields of spin-wave and NiFe resonance modes show the effect of the unidirectional anisotropy, which is about twice larger for the spin-wave mode due to spin pinning at the NiFe/IrMn interface. At Q-band frequency the angular variations of in-plane resonance fields also reveal the symmetry of a uniaxial anisotropy. A modified theoretical model which also includes the contribution of a rotatable anisotropy provides a good description of the experimental results. © 2014 Elsevier B.V.
Original languageAmerican English
Pages (from-to)167-172
Number of pages6
JournalPhysica B: Condensed Matter
DOIs
StatePublished - 1 Oct 2014
Externally publishedYes

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