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- W2747002342 abstract "By biasing a ferromagnetic metal MnGa/10 nm-thick, n-type GaAs quantum well (QW) junction from negative to positive, it is found that its spin dynamics at zero magnetic field is composed of two components with opposite signs. One is excited by a circularly polarized pump beam. The other is induced by ferromagnetic proximity polarization (FPP), which is continuously enhanced as the bias increases towards the positive direction. The time-resolved Kerr rotations have also been measured at a magnetic field of 0.9 Tesla. A phase reversion of Larmor precession is observed as the bias passes through +0.5 V. Following simple quantum mechanics, we become aware of the fact that the transmission and reflection rates of electrons at the interface of MnGa/n-type GaAs QW are enhanced by a factor of , which is the attempting frequency of electron onto a ferromagnet/semiconductor interface. That gives a reasonable explanation why the FPP effect in our MnGa/n-type GaAs QW junction is greatly enhanced as biasing it into forward direction." @default.
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- W2747002342 date "2017-10-13" @default.
- W2747002342 modified "2023-09-27" @default.
- W2747002342 title "Strong ferromagnetic proximity polarization in ferromagnetic metal MnGa/n-type GaAs quantum well junction" @default.
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- W2747002342 doi "https://doi.org/10.1088/1361-6463/aa883c" @default.
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