Presentation Substrate Materials dependence of Magnetic Domain Formation in CoFe Nanolayer Electrode Patterns

Hayato Yonemoto (RCIQE, Hokkaido University) ; Rui Ochiai (RCIQE, Hokkaido University) ; Soh Komatsu (Japan Advanced Institute of Science and Technology) ; Masashi Akabori (Japan Advanced Institute of Science and Technology) ; Shinjiro Hara ORCID (Research Center for Materials Nanoarchitectonics (MANA)/Semiconductor Materials Field/Semiconductor Nano-integration Group, National Institute for Materials Science)

MNC2025_Abstract_H_Yonemoto_Hokkaido_Univ_submitted.pdf
Download file (1.24 MB)
Download as zip (1.23 MB)
Collection

Citation
Hayato Yonemoto, Rui Ochiai, Soh Komatsu, Masashi Akabori, Shinjiro Hara. Substrate Materials dependence of Magnetic Domain Formation in CoFe Nanolayer Electrode Patterns. https://doi.org/10.48505/nims.5919

Alternative title: Substrate Materials dependence of Magnetic Domain Formation in CoFe Nanolayer Electrode Patterns

Description:

(abstract)

In this study, we report on the substrate materials dependences of magnetic domain formation in ferromagnetic CoFe nanolayer electrode patterns with CoFe layer thicknesses of 35 nm using direct observations by MFM. The substrate materials in the current study are MgO nanolayers, whose thicknesses are 1 and 4 nm, deposited on GaAs (001) wafers and amorphous SiO2 layers with the thickness of 1 μm thermally oxidized on Si (111) wafer surfaces. The influence of heterointerfaces on magnetic domain formation in CoFe nanolayer electrode patterns is also discussed. Without any application of B, we observe the marked reflux, double reflux, and single magnetic domains in the case of the samples with relatively thick buffer layers under CoFe. The CoFe nanolayer electrode patterns with 1-nm-MgO layers formed large number of (or multiple) small magnetic domains. These results suggest that the surface roughness of buffer layers plays an important role for magnetic domain formation in CoFe.

Rights:

Keyword: Magnetic domain formation, CoFe/MgO, Magnetic force microscopy, GaAs(001)

Conference: The 38th International Microprocesses and Nanotechnology Conference (MNC 2025) (2025-11-17 - 2025-11-20)

Funding:

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5919

First published URL:

Related item:

Other identifier(s):

Contact agent:

Updated at: 2025-11-21 16:30:13 +0900

Published on MDR: 2025-11-21 16:23:44 +0900

Filename Size
Filename MNC2025_Abstract_H_Yonemoto_Hokkaido_Univ_submitted.pdf (Thumbnail)
application/pdf 		Size 1.24 MB Detail