Ferromagnetic self-assembled quantum dots on semiconductor nanowires.
Ferromagnetic self-assembled alpha-MnAs quantum dots (QD) were grown epitaxially on metal catalyst-grown InAs nanowires (NW) by chemical vapor deposition. Magnetic force microscopy measurements demonstrated that the QDs are stable, single-domain ferromagnets with T(c) values of approximately 310 K. Single QD switching was demonstrated at fields as low as 60 Oe. The hybrid ferromagnetic/semiconductor QD/NW properties provide a promising basis for the development of nanowire spin-valves and magnetic memory devices.
Ramlan
Dinna G
DG
Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, USA.
May
Steven J
SJ
Zheng
Jian-Guo
JG
Allen
Jonathan E
JE
Wessels
Bruce W
BW
Lauhon
Lincoln J
LJ