Large perpendicular magnetic anisotropy at Fe/MgO interface

J. W. Koo; S. Mitani; T. T. Sasaki; H. Sukegawa; Z. C. Wen; T. Ohkubo; T. Niizeki; K. Inomata; K. Hono

doi:10.1063/1.4828658

Large perpendicular magnetic anisotropy at Fe/MgO interface

J. W. Koo, S. Mitani, T. T. Sasaki, H. Sukegawa, Z. C. Wen, T. Ohkubo, T. Niizeki, K. Inomata, K. Hono

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Abstract

A large perpendicular magnetic anisotropy (PMA) of 1.4 MJ/m³ was observed from ultrathin Fe/MgO(001) bilayers grown on Cr-buffered MgO(001). The PMA strongly depends on the surface state of Fe prior to the MgO deposition. A large PMA energy density of 1.4 MJ/m³ was achieved for a 0.7 nm thick Fe layer having adsorbate-induced surface reconstruction, which is likely to originate from oxygen atoms floating up from the Cr buffer layer. This large magnitude of PMA satisfies the criterion that is required for thermal stability of magnetization in a few tens nanometer-sized magnetic memory elements.

Original language	English
Article number	192401
Journal	Applied Physics Letters
Volume	103
Issue number	19
DOIs	https://doi.org/10.1063/1.4828658
Publication status	Published - 2013 Nov 4

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Large perpendicular magnetic anisotropy at Fe/MgO interface",

abstract = "A large perpendicular magnetic anisotropy (PMA) of 1.4 MJ/m3 was observed from ultrathin Fe/MgO(001) bilayers grown on Cr-buffered MgO(001). The PMA strongly depends on the surface state of Fe prior to the MgO deposition. A large PMA energy density of 1.4 MJ/m3 was achieved for a 0.7 nm thick Fe layer having adsorbate-induced surface reconstruction, which is likely to originate from oxygen atoms floating up from the Cr buffer layer. This large magnitude of PMA satisfies the criterion that is required for thermal stability of magnetization in a few tens nanometer-sized magnetic memory elements.",

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T1 - Large perpendicular magnetic anisotropy at Fe/MgO interface

AU - Koo, J. W.

AU - Mitani, S.

AU - Sasaki, T. T.

AU - Sukegawa, H.

AU - Wen, Z. C.

AU - Ohkubo, T.

AU - Niizeki, T.

AU - Inomata, K.

AU - Hono, K.

PY - 2013/11/4

Y1 - 2013/11/4

N2 - A large perpendicular magnetic anisotropy (PMA) of 1.4 MJ/m3 was observed from ultrathin Fe/MgO(001) bilayers grown on Cr-buffered MgO(001). The PMA strongly depends on the surface state of Fe prior to the MgO deposition. A large PMA energy density of 1.4 MJ/m3 was achieved for a 0.7 nm thick Fe layer having adsorbate-induced surface reconstruction, which is likely to originate from oxygen atoms floating up from the Cr buffer layer. This large magnitude of PMA satisfies the criterion that is required for thermal stability of magnetization in a few tens nanometer-sized magnetic memory elements.

AB - A large perpendicular magnetic anisotropy (PMA) of 1.4 MJ/m3 was observed from ultrathin Fe/MgO(001) bilayers grown on Cr-buffered MgO(001). The PMA strongly depends on the surface state of Fe prior to the MgO deposition. A large PMA energy density of 1.4 MJ/m3 was achieved for a 0.7 nm thick Fe layer having adsorbate-induced surface reconstruction, which is likely to originate from oxygen atoms floating up from the Cr buffer layer. This large magnitude of PMA satisfies the criterion that is required for thermal stability of magnetization in a few tens nanometer-sized magnetic memory elements.

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Large perpendicular magnetic anisotropy at Fe/MgO interface

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