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

被引：11
|
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
收藏
页码：167 / 172
页数：6
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