TY - JOUR
T1 - Direct observation of atomic ordering and interface structure in co 2mnsi/mgo/co2mnsi magnetic tunnel junctions by high-angle annular dark-field scanning transmission electron microscopy
AU - Miyajima, Toyoo
AU - Oogane, Mikihiko
AU - Kotaka, Yasutoshi
AU - Yamazaki, Takashi
AU - Tsukada, Mineharu
AU - Kataoka, Yuji
AU - Naganuma, Hiroshi
AU - Ando, Yasuo
PY - 2009/9
Y1 - 2009/9
N2 - The atomic ordering of Co2MnSi (CMS) full-Heusler film and the interface structure of CMS/MgO/CMS magnetic tunnel junctions (MTJs) were investigated by high-angle annular dark-field scanning transmission electron microscopy (HAADF STEM). We observed the atomic ordering of L21 and B2 structures of CMS from the atomic number (Z) contrast STEM images. We also confirmed that the interface structure consists of the layer next to the Co layer terminating in the CMS to MgO layer from the layer periodicity along the [001] direction, however, site-disorder exists between two atomic layers at the termination of CMS, including locally L21-ordered MnSi terminated structure.
AB - The atomic ordering of Co2MnSi (CMS) full-Heusler film and the interface structure of CMS/MgO/CMS magnetic tunnel junctions (MTJs) were investigated by high-angle annular dark-field scanning transmission electron microscopy (HAADF STEM). We observed the atomic ordering of L21 and B2 structures of CMS from the atomic number (Z) contrast STEM images. We also confirmed that the interface structure consists of the layer next to the Co layer terminating in the CMS to MgO layer from the layer periodicity along the [001] direction, however, site-disorder exists between two atomic layers at the termination of CMS, including locally L21-ordered MnSi terminated structure.
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U2 - 10.1143/APEX.2.093001
DO - 10.1143/APEX.2.093001
M3 - Article
AN - SCOPUS:70349146145
SN - 1882-0778
VL - 2
JO - Applied Physics Express
JF - Applied Physics Express
IS - 9
M1 - 093001
ER -