Interface magnetism of iron grown on sulfur and hydrogen passivated GaAs(001)

Journal Article · Sun Apr 01 04:00:00 EDT 2012 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3677822· OSTI ID:22036854

Kardasz, B; Watkins, S P; Montoya, E A; Burrowes, C; Girt, E; Heinrich, B

Sulfur (S) and hydrogen (H) atom passivated GaAs(001) templates were used for deposition of ultrathin crystalline Fe films using molecular beam epitaxy, where the Fe thickness ranged from 10 to 45 atomic layers. Reflection high-energy electron diffraction patterns showed that the S- and H-passivated surfaces had no and very weak (1 x 2) superlattice reconstructions, respectively. This indicates that these GaAs(001) templates have a square-like symmetry. Magnetic anisotropies were investigated using the in-plane angular dependence of ferromagnetic resonance at 36 GHz. The in-plane cubic and uniaxial anisotropies and perpendicular uniaxial field were described by bulk and interface contributions, indicating that the Fe films have a high lattice coherence. The magnetic properties of the Fe films were compared to those grown on more commonly used GaAs(001) templates having a (4 x 6) reconstruction with an As-rich in-plane uniaxial symmetry. The Fe films grown on S-passivated templates exhibited unique magnetic properties caused by a decreased lattice spacing compared to the bulk Fe.

• OSTI ID: 22036854
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 7 Vol. 111; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANISOTROPY
CRYSTAL STRUCTURE
DEPOSITION
ELECTRON DIFFRACTION
FERROMAGNETIC MATERIALS
FERROMAGNETIC RESONANCE
GALLIUM ARSENIDES
GHZ RANGE
INTERFACES
IRON
LAYERS
MAGNETIC PROPERTIES
MAGNETISM
MOLECULAR BEAM EPITAXY
REFLECTION
SUPERLATTICES
THIN FILMS