Exchange coupling and NOL magnetism consideration in Co1- xFex specular spin-valves

M. Doi; M. Izumi; Y. Abe; H. Fukuzawa; H. N. Fuke; H. Iwasaki; M. Sahashi

doi:10.1016/j.jmmm.2004.10.063

Exchange coupling and NOL magnetism consideration in Co_1- _xFe_x specular spin-valves

M. Doi, M. Izumi, Y. Abe, H. Fukuzawa, H. N. Fuke, H. Iwasaki, M. Sahashi

ENG - Electronic Engineering

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

To confirm the origin of the exchange coupling through the nano-oxide layer (NOL), the detailed analyses of the magnetization curve and the temperature dependence on magnetization for the Co_1- _xFe_x-NOL samples with various oxidation processes are investigated. The field cooling effect is observed for NOL-inserted samples, which suggests the existence of the antiferromagnetic (AFM) component in the NOL. The characteristic temperature (blocking temperature) increases with increase in the Fe content for Co_1-xFe _x(x=0.08,0.17,0.26)-NOL. These results support that NOL pinning appears higher than room temperature. Further, the twisted coupling through the NOL observed for the Co_0.50Fe_0.50-NOL is discussed from the viewpoint of the magnetic roughness due to the ferrimagnetic nature of the very thin NOL in specular spin valve (SPSV).

Original language	English
Pages (from-to)	381-386
Number of pages	6
Journal	Journal of Magnetism and Magnetic Materials
Volume	287
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.jmmm.2004.10.063
Publication status	Published - 2005 Feb 1

Keywords

Exchange coupling
Nano-oxide layer
Specular spin valve

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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title = "Exchange coupling and NOL magnetism consideration in Co1- xFex specular spin-valves",

abstract = "To confirm the origin of the exchange coupling through the nano-oxide layer (NOL), the detailed analyses of the magnetization curve and the temperature dependence on magnetization for the Co1- xFex-NOL samples with various oxidation processes are investigated. The field cooling effect is observed for NOL-inserted samples, which suggests the existence of the antiferromagnetic (AFM) component in the NOL. The characteristic temperature (blocking temperature) increases with increase in the Fe content for Co1-xFe x(x=0.08,0.17,0.26)-NOL. These results support that NOL pinning appears higher than room temperature. Further, the twisted coupling through the NOL observed for the Co0.50Fe0.50-NOL is discussed from the viewpoint of the magnetic roughness due to the ferrimagnetic nature of the very thin NOL in specular spin valve (SPSV).",

keywords = "Exchange coupling, Nano-oxide layer, Specular spin valve",

author = "M. Doi and M. Izumi and Y. Abe and H. Fukuzawa and Fuke, {H. N.} and H. Iwasaki and M. Sahashi",

year = "2005",

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doi = "10.1016/j.jmmm.2004.10.063",

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TY - JOUR

T1 - Exchange coupling and NOL magnetism consideration in Co1- xFex specular spin-valves

AU - Doi, M.

AU - Izumi, M.

AU - Abe, Y.

AU - Fukuzawa, H.

AU - Fuke, H. N.

AU - Iwasaki, H.

AU - Sahashi, M.

PY - 2005/2/1

Y1 - 2005/2/1

N2 - To confirm the origin of the exchange coupling through the nano-oxide layer (NOL), the detailed analyses of the magnetization curve and the temperature dependence on magnetization for the Co1- xFex-NOL samples with various oxidation processes are investigated. The field cooling effect is observed for NOL-inserted samples, which suggests the existence of the antiferromagnetic (AFM) component in the NOL. The characteristic temperature (blocking temperature) increases with increase in the Fe content for Co1-xFe x(x=0.08,0.17,0.26)-NOL. These results support that NOL pinning appears higher than room temperature. Further, the twisted coupling through the NOL observed for the Co0.50Fe0.50-NOL is discussed from the viewpoint of the magnetic roughness due to the ferrimagnetic nature of the very thin NOL in specular spin valve (SPSV).

AB - To confirm the origin of the exchange coupling through the nano-oxide layer (NOL), the detailed analyses of the magnetization curve and the temperature dependence on magnetization for the Co1- xFex-NOL samples with various oxidation processes are investigated. The field cooling effect is observed for NOL-inserted samples, which suggests the existence of the antiferromagnetic (AFM) component in the NOL. The characteristic temperature (blocking temperature) increases with increase in the Fe content for Co1-xFe x(x=0.08,0.17,0.26)-NOL. These results support that NOL pinning appears higher than room temperature. Further, the twisted coupling through the NOL observed for the Co0.50Fe0.50-NOL is discussed from the viewpoint of the magnetic roughness due to the ferrimagnetic nature of the very thin NOL in specular spin valve (SPSV).

KW - Exchange coupling

KW - Nano-oxide layer

KW - Specular spin valve

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JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

SN - 0304-8853

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