Annealing-Dependent Magnetic Depth Profile in Ga[1-x]Mn[x]As

Abstract

We have studied the depth-dependent magnetic and structural properties of as-grown and optimally annealed Ga[1-x]Mn[x]As films using polarized neutron reflectometry. In addition to increasing total magnetization, the annealing process was observed to produce a significantly more homogeneous distribution of the magnetization. This difference in the films is attributed to the redistribution of Mn at interstitial sites during the annealing process. Also, we have seen evidence of significant magnetization depletion at the surface of both as-grown and annealed films.

5 pages, 3 figures

References in corpus (8)

• Mn Interstitial Diffusion in (Ga,Mn)As
• Effects of annealing time on defect-controlled ferromagnetism in Ga1-xMnxAs
• Highly enhanced Curie temperatures in low temperature annealed (Ga,Mn)As epilayers
• Spin interactions of interstitial Mn ions in ferromagnetic GaMnAs
• Saturated Ferromagnetism and Magnetization Deficit in Optimally Annealed (Ga,Mn)As Epilayers
• Fundamental Curie temperature limit in ferromagnetic GaMnAs
• Lattice constant variation and complex formation in zincblende Gallium Manganese Arsenide
• Do As antisites destroy the ferromagnetism of (Ga,Mn)As?

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• Magnetic spin excitations in diluted ferromagnetic systems: the case of $G{a}_{1-x}M{n}_{x}As$
• Thickness dependence of magnetic properties of (Ga,Mn)As
• Magnetic and chemical nonuniformity in Ga[1-x]Mn[x]As films as probed by polarized neutron and x-ray reflectometry
• Superexchange induced canted ferromagnetism in dilute magnets
• Softening of Spin-Wave Stiffness near the Ferromagnetic Phase Transition in Diluted Magnetic Semiconductors
• Depth profile high-energy spectroscopic study of Mn-doped GaN prepared by thermal diffusion
• Effects of Capping on the (Ga,Mn)As Magnetic Depth Profile
• Spatially controlled formation of superparamagnetic (Mn,Ga)As nanocrystals in high temperature annealed (Ga,Mn)As/GaAs superlattices
• On the reliability of recent Monte Carlo studies of dilute systems of localized spins interacting with itinerant carriers