%0 Journal Article
%A Kohn, Amit
%A Tal, Nadav
%A Elkayam, Ayala
%A Kovàcs, Andras
%A Li, Dalai
%A Wang, Shouguo
%A Ghannadzadeh, Saman
%A Hesjedal, Thorsten
%A Ward, Roger C. C.
%T Structure of epitaxial L10-FePt/MgO perpendicular magnetic tunnel junctions
%J Applied physics letters
%V 102
%N 6
%@ 0003-6951
%C Melville, NY
%I American Inst. of Physics
%M FZJ-2015-03916
%P 062403 -
%D 2013
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000315053300044
%R 10.1063/1.4791576
%U https://juser.fz-juelich.de/record/201622