Ordering ferromagnetic In{sub 1−x}Mn{sub x}As quantum dots
- Instituto de Física de São Carlos, Universidade de São Paulo, São Carlos 13560-970, SP (Brazil)
- Department of Physics, University of Arkansas, Fayetteville, Arkansas 72701 (United States)
In this work, we present a method to order low temperature (LT) self-assembled ferromagnetic In{sub 1−x}Mn{sub x}As quantum dots (QDs) grown by molecular beam epitaxy (MBE). The ordered In{sub 1−x}Mn{sub x}As QDs were grown on top of a non-magnetic In{sub 0.4}Ga{sub 0.6}As/GaAs(100) QDs multi-layered structure. The modulation of the chemical potential, due to the stacking, provides a nucleation center for the LT In{sub 1−x}Mn{sub x}As QDs. For particular conditions, such as surface morphology and growth conditions, the In{sub 1−x}Mn{sub x}As QDs align along lines like chains. For comparison purposes, we also report the study of QDs grown on plain GaAs(100) substrates. Ferromagnetic behavior was observed for all structures at 2 K.
- OSTI ID:
- 22261855
- Journal Information:
- AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1566; ISSN APCPCS; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Ge{sub 1-x}Mn{sub x} heteroepitaxial quantum dots: Growth, morphology, and magnetism
Origin of ferromagnetism in self-assembled Ga{sub 1-x}Mn{sub x}As quantum dots grown on Si