Epitaxial Mn2.5 Ga thin films with giant perpendicular magnetic anisotropy for spintronic devices

Feng Wu, Shigemi Mizukami, Daisuke Watanabe, Hiroshi Naganuma, Mikihiko Oogane, Yasuo Ando, Terunobu Miyazaki

Research output: Contribution to journalArticlepeer-review

179 Citations (Scopus)

Abstract

We report on epitaxial growth and magnetic properties of Mn2.5 Ga thin films, which were deposited on Cr/MgO single crystal substrates by magnetron sputtering. X-ray diffraction results revealed the epitaxial relationships as Mn2.5 Ga (001) [100] Cr (001) [110] MgO (001) [100]. The presence of (002) and (011) superlattice peaks indicates that the films were crystallized into DO22 ordered structures. The perpendicular magnetic anisotropy (PMA) properties were found to be related to the extent of DO22 chemical ordering. A giant PMA (Ku eff =1.2× 107 erg/ cm3) and low saturation magnetization (Ms =250 emu/ cm3) can be obtained for the film with highest chemical ordering parameter (S=0.8).

Original languageEnglish
Article number122503
JournalApplied Physics Letters
Volume94
Issue number12
DOIs
Publication statusPublished - 2009

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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