TY - JOUR
T1 - Giant magnetoresistance in nanoscale ferromagnetic heterocontacts
AU - Useinov, AN
AU - Deminov, RG
AU - Tagirov, LR
AU - Pan, G
PY - 2007/4/19
Y1 - 2007/4/19
N2 - A quasi-classical theory of giant magnetoresistance (GMR) in nanoscale point contacts between different ferromagnetic metals is developed. The contacts were sorted by three types of mutual positions of the conduction spin-subband bottoms which are shifted one against another by the exchange interaction. A model of a linear domain wall has been used to account for the finite contact length. The magnetoresistance is plotted against the size of the nanocontact. In heterocontacts the magnetoresistance effect not only turns out to be negative, as usual, but it can be positive as well. The relevance of the results to existing experiments on GMR in point heterocontacts is discussed.
AB - A quasi-classical theory of giant magnetoresistance (GMR) in nanoscale point contacts between different ferromagnetic metals is developed. The contacts were sorted by three types of mutual positions of the conduction spin-subband bottoms which are shifted one against another by the exchange interaction. A model of a linear domain wall has been used to account for the finite contact length. The magnetoresistance is plotted against the size of the nanocontact. In heterocontacts the magnetoresistance effect not only turns out to be negative, as usual, but it can be positive as well. The relevance of the results to existing experiments on GMR in point heterocontacts is discussed.
U2 - 10.1088/0953-8984/19/19/196215
DO - 10.1088/0953-8984/19/19/196215
M3 - Article
SN - 0953-8984
VL - 19
JO - Journal of Physics-Condensed Matter
JF - Journal of Physics-Condensed Matter
M1 - 196215
ER -