Determination of Exchange and Rotatable Anisotropies in Co₂FeSi/IrMn Exchange Coupled Structures using Broadband Ferromagnetic Resonance

• Authors: H. Głowiński , M. Schmidt , A. Krysztofik , I. Gościańska , J. Dubowik
• Languages of publication: EN

Abstracts

EN

We determined exchange H_{ex} and rotatable H_{rot} anisotropy fields of multilayers that comprise 10 nm Co₂FeSi (CFS) layers exchange coupled to 20 nm IrMn layers by using ferromagnetic resonance with a vector network analyzer (VNA-FMR). The multilayer structures consist of IrMn/bottom (b)-CFS/IrMn/middle (m)-CFS/IrMn/top (t)-CFS/IrMn layers so that each CFS layer is surrounded by a pair of IrMn layers. In the structures, the exchange bias field propagates in such a way that H_{ex}^{t} > H_{ex}^{m} > H_{ex}^{b} for the top, middle, and bottom layer, respectively. FMR response measured along the exchange bias (EB) axis consist of only two absorptions related to the (b+m)- and (t)-CFS layers, respectively. Exchange and rotatable anisotropy determined independently from angular and dispersion measurements of the resonance fields are nearly the same. Rotatable anisotropy field scales with the exchange bias field in these complex structures.

Keywords

EN

75.30.Gw; 75.30.Et; 75.60.Jk

Discipline

• 75.30.Et: Exchange and superexchange interactions(see also 71.70.Gm Exchange interactions)
• 75.30.Gw: Magnetic anisotropy
• 75.60.Jk: Magnetization reversal mechanisms

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2015
• Volume: 127
• Issue: 2
• Pages: 531-533

Dates

published

2015-02

Contributors

author

H. Głowiński

• Institute of Molecular Physics, Polish Academy of Sciences, PL-60179 Poznań, Poland

author

M. Schmidt

• Institute of Molecular Physics, Polish Academy of Sciences, PL-60179 Poznań, Poland

author

A. Krysztofik

• Faculty of Physics, A. Mickiewicz University, Umultowska 85, PL-61614, Poznań, Poland

author

I. Gościańska

• Faculty of Physics, A. Mickiewicz University, Umultowska 85, PL-61614, Poznań, Poland

author

J. Dubowik

• Institute of Molecular Physics, Polish Academy of Sciences, PL-60179 Poznań, Poland

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Identifiers

DOI

10.12693/APhysPolA.127.531