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

Research output: Contribution to journalArticlepeer-review

71 Citations (Scopus)

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 languageEnglish
Article number192401
JournalApplied Physics Letters
Volume103
Issue number19
DOIs
Publication statusPublished - 2013 Nov 4

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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