GaN/Fe core/shell nanowires for nonvolatile spintronics on Si

Journal Article · Wed Jun 15 00:00:00 EDT 2011 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PHYSREVB.83.245323· OSTI ID:21544792

Cunxu, Gao; Farshchi, Rouin; Roder, Claudia; Dogan, Pinar; Brandt, Oliver ^[1]

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1. 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, Vol. 83, Issue 24; Other Information: DOI: 10.1103/PhysRevB.83.245323; (c) 2011 American Institute of Physics; ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
DENSITY
EPITAXY
GALLIUM NITRIDES
IRON
MAGNETIC PROPERTIES
MONOCRYSTALS
NANOSTRUCTURES
QUANTUM WIRES
SUBSTRATES
SUPERPARAMAGNETISM
CRYSTAL GROWTH METHODS
CRYSTALS
ELEMENTS
GALLIUM COMPOUNDS
MAGNETISM
METALS
NITRIDES
NITROGEN COMPOUNDS
PHYSICAL PROPERTIES
PNICTIDES
TRANSITION ELEMENTS