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

被引：10

作者：

de Sousa, Marcos Antonio ^{[1
]}

Pelegrini, Fernando ^{[1
]}

Alayo, Willian ^{[2
]}

Quispe-Marcatoma, Justiniano ^{[3
]}

Baggio-Saitovitch, Elisa ^{[3
]}

机构：

[1] Univ Fed Goias, Inst Fis, BR-74001970 Goiania, Go, Brazil

[2] Univ Fed Pelotas, Dept Fis, BR-96010900 Pelotas, Brazil

[3] Ctr Brasileiro Pesquisas Fis, BR-22290180 Rio De Janeiro, Brazil

来源：

PHYSICA B-CONDENSED MATTER | 2014年 / 450卷

关键词：

Ferromagnetic resonance; Spin wave resonance; Exchange bias; Magnetic bilayers; Anisotropy; Spin pinning; FILMS; SPECTRA;

D O I：

10.1016/j.physb.2014.05.050

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

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. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：167 / 172

页数：6

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