Abstract
Fifteen kiloelectronvolts focused Mn ion beam was implanted on molecular beam epitaxy-grown Si-δ-doped GaAs which was mesa-etched to form Hall-bar geometry and annealed at 840 °C for 10 s in hydrogen and argon mixed gas ambient. Au–Si–Mn liquid metal alloy ion source was fabricated to perform both Mn and Si ion implantation. From the Hall resistance measurement at 77 K, non-linear behavior and hysteresis were observed in the Hall resistance in the Mn implanted region. The present result indicates that a ferromagnetic layer is formed in GaAs by the Mn ion implantation.
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