Co thickness dependence of structural and magnetic properties in spin quantum cross devices utilizing stray magnetic fields

Hideo Kaiju, H. Kasa, T. Komine, S. Mori, T. Misawa, T. Abe, J. Nishii

研究成果: Article

2 引用 (Scopus)

抄録

We investigate the Co thickness dependence of the structural and magnetic properties of Co thin-film electrodes sandwiched between borate glasses in spin quantum cross (SQC) devices that utilize stray magnetic fields. We also calculate the Co thickness dependence of the stray field between the two edges of Co thin-film electrodes in SQC devices using micromagnetic simulation. The surface roughness of Co thin films with a thickness of less than 20 nm on borate glasses is shown to be as small as 0.18 nm, at the same scanning scale as the Co film thickness, and the squareness of the hysteresis loop is shown to be as large as 0.96-1.0. As a result of the establishment of polishing techniques for Co thin-film electrodes sandwiched between borate glasses, we successfully demonstrate the formation of smooth Co edges and the generation of stray magnetic fields from Co edges. Theoretical calculation reveals that a strong stray field beyond 6 kOe is generated when the Co thickness is greater than 10 nm at a junction gap distance of 5 nm. From these experimental and calculation results, it can be concluded that SQC devices with a Co thickness of 10-20 nm can be expected to function as spin-filter devices.

元の言語English
記事番号17C738
ジャーナルJournal of Applied Physics
117
発行部数17
DOI
出版物ステータスPublished - 2015 5 7
外部発表Yes

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magnetic properties
borates
magnetic fields
thin films
electrodes
glass
polishing
surface roughness
film thickness
hysteresis
filters
scanning
simulation

ASJC Scopus subject areas

  • Physics and Astronomy(all)

これを引用

Co thickness dependence of structural and magnetic properties in spin quantum cross devices utilizing stray magnetic fields. / Kaiju, Hideo; Kasa, H.; Komine, T.; Mori, S.; Misawa, T.; Abe, T.; Nishii, J.

:: Journal of Applied Physics, 巻 117, 番号 17, 17C738, 07.05.2015.

研究成果: Article

Kaiju, Hideo ; Kasa, H. ; Komine, T. ; Mori, S. ; Misawa, T. ; Abe, T. ; Nishii, J. / Co thickness dependence of structural and magnetic properties in spin quantum cross devices utilizing stray magnetic fields. :: Journal of Applied Physics. 2015 ; 巻 117, 番号 17.
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AU - Abe, T.

AU - Nishii, J.

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