TY  - JOUR
AU  - Kohn, Amit
AU  - Tal, Nadav
AU  - Elkayam, Ayala
AU  - Kovàcs, Andras
AU  - Li, Dalai
AU  - Wang, Shouguo
AU  - Ghannadzadeh, Saman
AU  - Hesjedal, Thorsten
AU  - Ward, Roger C. C.
TI  - Structure of epitaxial L10-FePt/MgO perpendicular magnetic tunnel junctions
JO  - Applied physics letters
VL  - 102
IS  - 6
SN  - 0003-6951
CY  - Melville, NY
PB  - American Inst. of Physics
M1  - FZJ-2015-03916
SP  - 062403 -
PY  - 2013
AB  - Perpendicular magnetic tunnel junctions (p-MTJs) with MgO barriers are interesting for high-density information-storage devices. Chemically ordered L10-FePt is a potential electrode due to its large perpendicular magnetocrystalline anisotropy. To-date, a single theoretical study on L10-FePt/MgO p-MTJ based on an idealized structure reported significant dependence of spin-dependent tunneling on interface structure. [Y. Taniguchi et al., IEEE Trans. Magn. 44, 2585 (2008).] We report a structural study of epitaxial L10-FePt(001)[110]//MgO(001)[110]//L10-FePt(001)[110] p-MTJs, focusing on the interfaces using aberration-corrected scanning transmission electron microscopy. Interfaces are semi-coherent, with oxygen atomic-columns of MgO located opposite to iron atomic-columns in L10-FePt. Up to three lattice planes show atomic-column steps, the origin of which is attributed to antiphase boundaries in L10-FePt.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000315053300044
DO  - DOI:10.1063/1.4791576
UR  - https://juser.fz-juelich.de/record/201622
ER  -