Determination of fine magnetic structure of magnetic multilayer with quasi antiferromagnetic layer by using polarized neutron reflectivity analysis

Yongshi Zhong,Gen Nagashima,Pascal Krautscheid,Hiromi Yuasa,Yuichiro Kurokawa,Mathias Kläui,Daniel Schönke,Robert M Reeve,Shu Horiike,Takayasu Hanashima

doi:10.1063/1.5130445

Yongshi Zhong, Gen Nagashima + Show 8 more

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https://doi.org/10.1063/1.5130445

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We carried out polarized neutron reflectivity (PNR) analysis to determine the fine magnetic structure of magnetic multilayers with quasi-antiferromagnetic (quasi-AFM) layers realized by 90-deg coupling using two Co90Fe10 layers, and quantitatively evaluated the magnetization of quasi-AFM layers. Two types of samples with different buffer layers, Ru buffer and a NiFeCr buffer, were investigated and the average angles between the respective magnetization of the two Co90Fe10 layers were estimated to be +/− 39 degrees and +/− 53 degrees. In addition, less roughness was found in the NiFeCr buffer sample resulting stronger 90-deg coupling. A perfect quasi-AFM is expected to be realized by a flat interface of the magnetic multilayer.

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Scitation.org/journal/adv where M1 and M2 are the unit magnetization in the first and second FM layers respectively, and A12 and B12 are the bilinear and biquadratic coupling coefficients, respectively
We carried out polarized neutron reflectivity (PNR) analysis to determine the fine magnetic structure of magnetic multilayers with quasiantiferromagnetic layers realized by 90-deg coupling using two Co90Fe10 layers, and quantitatively evaluated the magnetization of quasi-AFM layers
In this study, we carried out polarized neutron reflectivity (PNR) analysis of the multilayer with quasi-AFM layers because PNR is suitable for analyzing the magnetization quantitively and obtaining 3D information of multilayers

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Scitation.org/journal/adv where M1 and M2 are the unit magnetization in the first and second FM layers respectively, and A12 and B12 are the bilinear and biquadratic coupling coefficients, respectively. ABSTRACT We carried out polarized neutron reflectivity (PNR) analysis to determine the fine magnetic structure of magnetic multilayers with quasiantiferromagnetic (quasi-AFM) layers realized by 90-deg coupling using two Co90Fe10 layers, and quantitatively evaluated the magnetization of quasi-AFM layers. Two types of samples with different buffer layers, Ru buffer and a NiFeCr buffer, were investigated and the average angles between the respective magnetization of the two Co90Fe10 layers were estimated to be +/− 39 degrees and +/− 53 degrees.

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