Domain Structure in CoFeB Thin Films With Perpendicular Magnetic Anisotropy

Michihiko Yamanouchi; Shoji Ikeda; Fumihiro Matsukura; Hideo Ohno; Albrecht Jander; Pallavi Dhagat

doi:10.1109/LMAG.2011.2159484

Domain Structure in CoFeB Thin Films With Perpendicular Magnetic Anisotropy

Michihiko Yamanouchi, Shoji Ikeda, Fumihiro Matsukura, Hideo Ohno, Albrecht Jander, Pallavi Dhagat

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

114 Citations (Scopus)

Abstract

Domain structures in CoFeB-MgO thin films with a perpendicular easy magnetization axis were observed by magneto-optic Kerr-effect microscopy at various temperatures. The domain-wall surface energy was obtained by analyzing the spatial period of the stripe domains and fitting established domain models to the period. In combination with superconducting quantum interference device measurements of magnetization and anisotropy energy, this leads to an estimate of the exchange stiffness and domain-wall width in these films. These parameters are essential for determining whether domain walls will form in patterned structures and devices made of such materials.

Original language	English
Pages (from-to)	3000304
Number of pages	1
Journal	IEEE Magnetics Letters
Volume	2
DOIs	https://doi.org/10.1109/LMAG.2011.2159484
Publication status	Published - 2011 Dec 1

Keywords

Spin electronics
magnetic stripe domains
magneto-optic Kerr effect
perpendicular magnetic anisotropy

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10.1109/LMAG.2011.2159484

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abstract = "Domain structures in CoFeB-MgO thin films with a perpendicular easy magnetization axis were observed by magneto-optic Kerr-effect microscopy at various temperatures. The domain-wall surface energy was obtained by analyzing the spatial period of the stripe domains and fitting established domain models to the period. In combination with superconducting quantum interference device measurements of magnetization and anisotropy energy, this leads to an estimate of the exchange stiffness and domain-wall width in these films. These parameters are essential for determining whether domain walls will form in patterned structures and devices made of such materials.",

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T1 - Domain Structure in CoFeB Thin Films With Perpendicular Magnetic Anisotropy

AU - Yamanouchi, Michihiko

AU - Ikeda, Shoji

AU - Matsukura, Fumihiro

AU - Ohno, Hideo

AU - Jander, Albrecht

AU - Dhagat, Pallavi

N1 - Funding Information: The authors thank I. Morita, T. Hirata, and H. Iwanuma for their technical support. This work was supported by the FIRST program from the Japan Society for the Promotion of Science.

PY - 2011/12/1

Y1 - 2011/12/1

N2 - Domain structures in CoFeB-MgO thin films with a perpendicular easy magnetization axis were observed by magneto-optic Kerr-effect microscopy at various temperatures. The domain-wall surface energy was obtained by analyzing the spatial period of the stripe domains and fitting established domain models to the period. In combination with superconducting quantum interference device measurements of magnetization and anisotropy energy, this leads to an estimate of the exchange stiffness and domain-wall width in these films. These parameters are essential for determining whether domain walls will form in patterned structures and devices made of such materials.

AB - Domain structures in CoFeB-MgO thin films with a perpendicular easy magnetization axis were observed by magneto-optic Kerr-effect microscopy at various temperatures. The domain-wall surface energy was obtained by analyzing the spatial period of the stripe domains and fitting established domain models to the period. In combination with superconducting quantum interference device measurements of magnetization and anisotropy energy, this leads to an estimate of the exchange stiffness and domain-wall width in these films. These parameters are essential for determining whether domain walls will form in patterned structures and devices made of such materials.

KW - Spin electronics

KW - magnetic stripe domains

KW - magneto-optic Kerr effect

KW - perpendicular magnetic anisotropy

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Domain Structure in CoFeB Thin Films With Perpendicular Magnetic Anisotropy

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Keywords

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