GaN/Fe core/shell nanowires for nonvolatile spintronics on Si
- Paul-Drude-Institut fuer Festkoerperelektronik, Hausvogteiplatz 5-7, D-10117 Berlin (Germany)
We explore the relationship between the structural and magnetic properties of GaN/Fe core/shell nanowires grown epitaxially on Si substrates. The magnetic properties are consistent with the coexistence of two magnetic contributions: a ferromagnetic response from the single-crystalline Fe particles formed at the nanowire tips, and a superparamagnetic response originating from the granular Fe clusters grown on the nanowire sidewalls, giving them a corncob-like morphology. We show that our interpretation of the origin of the magnetic behavior can be confirmed by the viscous decay of magnetic remanence in the nanowires. Ferromagnetic remanence is observed both parallel and perpendicular to the nanowire axis, making such structures appealing as high-density nonvolatile spintronic components on Si.
- OSTI ID:
- 21544792
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 24 Vol. 83; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CRYSTAL GROWTH METHODS
CRYSTALS
DENSITY
ELEMENTS
EPITAXY
GALLIUM COMPOUNDS
GALLIUM NITRIDES
IRON
MAGNETIC PROPERTIES
MAGNETISM
METALS
MONOCRYSTALS
NANOSTRUCTURES
NITRIDES
NITROGEN COMPOUNDS
PHYSICAL PROPERTIES
PNICTIDES
QUANTUM WIRES
SUBSTRATES
SUPERPARAMAGNETISM
TRANSITION ELEMENTS