Ferromagnetic Self-Assembled Quantum Dots on Semiconductor Nanowires

Ferromagnetic Self-Assembled Quantum Dots on Semiconductor Nanowires

Ferromagnetic self-assembled α-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 ∼310 K. Single QD switchin...

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Veröffentlicht in:Nano letters 2006-01, Vol.6 (1), p.50-54
Hauptverfasser: Ramlan, Dinna G, May, Steven J, Zheng, Jian-Guo, Allen, Jonathan E, Wessels, Bruce W, Lauhon, Lincoln J
Format: Artikel
Sprache:eng
Schlagworte:
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Methods of nanofabrication
Nanoscale materials and structures: fabrication and characterization
Physics
Quantum dots
Self-assembly
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Zusammenfassung:Ferromagnetic self-assembled α-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 ∼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.
ISSN:1530-6984
1530-6992
DOI:10.1021/nl0519276