Spin dynamics and magnetic anisotropies at the Fe/GaAs(001) interface

Journal Article · Fri Apr 01 04:00:00 EDT 2011 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3556786· OSTI ID:21560135

Kardasz, B; Montoya, E A; Eyrich, C; Girt, E; Heinrich, B ^[1]

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1. Physics Department, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia, V5A 1S6 (Canada)

20Au/(d)Fe/GaAs(001) structures were deposited using molecular beam epitaxy, where Fe thickness d = (5...90) atomic layers. Interface anisotropies were investigated using the in-plane angular dependence of ferromagnetic resonance (FMR). Intrinsic and extrinsic contributions to magnetic damping were investigated using FMR linewidth ({Delta}H) measurements at 9, 24, 36, and 72 GHz (in-plane configuration) and 9, 24, and 36 GHz (perpendicular configuration). The in-plane cubic and uniaxial perpendicular anisotropies were well described by the bulk and interface contributions indicating that the Fe films have a high lattice coherence and high critical Curie temperature T{sub c}. The in-plane uniaxial anisotropy is more complex and will be discussed in detail. The frequency dependence of {Delta}H(f) was analyzed using the Gilbert damping, two magnon scattering, and long range magnetic inhomogeneity contributions. The thickness dependence of the Gilbert damping parameter {alpha} was found to be well described by the bulk and interface terms.

• OSTI ID: 21560135
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 7 Vol. 109; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANGULAR MOMENTUM
ANISOTROPY
ARSENIC COMPOUNDS
ARSENIDES
CONFIGURATION
CRYSTAL GROWTH METHODS
CURIE POINT
DAMPING
DIMENSIONS
ELEMENTS
EPITAXY
FERROMAGNETIC RESONANCE
FILMS
FREQUENCY DEPENDENCE
GALLIUM ARSENIDES
GALLIUM COMPOUNDS
GOLD
INTERFACES
IRON
LAYERS
MAGNETIC RESONANCE
MAGNONS
METALS
MOLECULAR BEAM EPITAXY
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
PNICTIDES
QUASI PARTICLES
RESONANCE
SCATTERING
SPIN
THERMODYNAMIC PROPERTIES
THICKNESS
THIN FILMS
TRANSITION ELEMENTS
TRANSITION TEMPERATURE