Title :
Extended Hückel theory for quantum transport in magnetic tunnel junctions
Author :
Shine, Gautam ; Manipatruni, Sasikanth ; Chaudhry, Amita ; Saraswat, Krishna C. ; Nikonov, Dmitri E. ; Young, Ian A.
Author_Institution :
Dept. of Electr. Eng., Stanford Univ., Stanford, CA, USA
Abstract :
Spin-resolved conductivities in magnetic tunnel junctions are calculated using a semiempirical tight-binding model and non-equilibrium Green´s functions. The performance of half-metallic electrodes is studied by comparing conventional Fe-MgO-Fe structures to Co2FeAl-MgO-Co2FeAl structures. The results show higher tunneling magnetoresistance and resistance-area product for Co2FeAl devices across a wide bias range.
Keywords :
EHT calculations; Green´s function methods; aluminium alloys; cobalt alloys; electrodes; iron alloys; magnesium compounds; magnetic devices; tunnelling magnetoresistance; Co2FeAl; Co2FeAl-MgO-Co2FeAl; Fe-MgO-Fe; extended Huckel theory; half-metallic electrodes; magnetic tunnel junctions; nonequilibrium Green´s functions; quantum transport; resistance-area product; semiempirical tight-binding model; spin-resolved conductivities; tunneling magnetoresistance; Electrodes; Green´s function methods; Iron; Magnetic tunneling; Tunneling magnetoresistance;
Conference_Titel :
Simulation of Semiconductor Processes and Devices (SISPAD), 2014 International Conference on
Conference_Location :
Yokohama
Print_ISBN :
978-1-4799-5287-8
DOI :
10.1109/SISPAD.2014.6931623
