Rotatable anisotropy of Ni81Fe19/Ir20Mn80 films: A study using broadband ferromagnetic resonance

被引：13

作者：

Dutra, R. ^{[1
]}

Gonzalez-Chavez, E. ^{[1
]}

Marcondes, T. L. ^{[1
]}

de Andrade, A. M. H. ^{[2
]}

Geshev, J. ^{[2
]}

Sommer, R. L. ^{[1
]}

机构：

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

[2] Univ Fed Rio Grande do Sul, Inst Fis, BR-91501970 Porto Alegre, RS, Brazil

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2013年 / 346卷

关键词：

Exchange bias; Rotatable anisotropy; Broadband FMR;

D O I：

10.1016/j.jmmm.2013.06.040

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigate the broadband ferromagnetic resonance dispersion relation of NiFe/IrMn multilayers using the vector network analyzer ferromagnetic resonance (VNA-FMR) method. Multilayered films with structure [NiFe(20 nm)/IrMn (t(IrMn))/Ta(3 nm)] x 10 (with t(IrMn)=4 and 15 nm) were produced onto Si (100) substrates using magnetron sputtering. The dispersion relations of the samples were extracted from the resonance spectra in the range of 0.1-7 GHz under magnetic fields of up to +/- 300 Oe. Static magnetization curves were also obtained in the same held range. The experimental data were compared with numerical calculations performed using the granular exchange-bias model which takes into account both, the unidirectional and rotatable anisotropy present in the samples. A good agreement between numerical and experimental results was achieved without the need of any frequency or held-dependent parameter. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：1 / 4

页数：4

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