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

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

doi:10.1063/1.5130445

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

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

Electronic Devices

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Abstract

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.

Original language	English
Article number	015323
Journal	AIP Advances
Volume	10
Issue number	1
DOIs	https://doi.org/10.1063/1.5130445
Publication status	Published - Jan 1 2020

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.1063/1.5130445

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@article{be6e15bfa9964f5ba3abf7ed889ea71a,

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

abstract = "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.",

author = "Yongshi Zhong and Yuichiro Kurokawa and Gen Nagashima and Shu Horiike and Takayasu Hanashima and Daniel Sch{\"o}nke and Pascal Krautscheid and Reeve, {Robert M.} and Mathias Kl{\"a}ui and Hiromi Yuasa",

note = "Funding Information: This work was supported by the Canon Foundation, the JSPS Program for Fostering Globally Talented Researchers, and JSPS KAKENHI Grant Number JP19K04471. The neutron experiment was carried out in Materials and Life Science Experimental Facility (MLF), Japan Proton Accelerator Research Complex (J-PARC) and user program proposal No. 2018B0182. Publisher Copyright: {\textcopyright} 2020 Author(s).",

year = "2020",

month = jan,

day = "1",

doi = "10.1063/1.5130445",

language = "English",

volume = "10",

journal = "AIP Advances",

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T1 - Determination of fine magnetic structure of magnetic multilayer with quasi antiferromagnetic layer by using polarized neutron reflectivity analysis

AU - Zhong, Yongshi

AU - Kurokawa, Yuichiro

AU - Nagashima, Gen

AU - Horiike, Shu

AU - Hanashima, Takayasu

AU - Schönke, Daniel

AU - Krautscheid, Pascal

AU - Reeve, Robert M.

AU - Kläui, Mathias

AU - Yuasa, Hiromi

N1 - Funding Information: This work was supported by the Canon Foundation, the JSPS Program for Fostering Globally Talented Researchers, and JSPS KAKENHI Grant Number JP19K04471. The neutron experiment was carried out in Materials and Life Science Experimental Facility (MLF), Japan Proton Accelerator Research Complex (J-PARC) and user program proposal No. 2018B0182. Publisher Copyright: © 2020 Author(s).

PY - 2020/1/1

Y1 - 2020/1/1

N2 - 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.

AB - 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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ER -

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

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