Physics – Condensed Matter – Materials Science
Scientific paper
2004-09-09
Physics
Condensed Matter
Materials Science
12 pages, 4 figures
Scientific paper
We studied magnetoresistance (MR) of nanoconstrictions created in (Ga,Mn)As epilayers by O+ ion implantation. Original layers exhibit a negative MR that is plausibly caused by weak localization (WL) effects at the lowest temperatures. In constricted samples, additionally, jumps of an enhanced conductance appear on the background of the negative MR, whose positions reflect the hysteresis of magnetization. We argue that they are manifestation of a suppression of WL due to the nucleation of a domain wall in the constriction
Dobrowolski W.
Figielski T.
Makosa A.
Morawski A.
Pelya O.
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