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- W2140167371 abstract "We report on the epitaxial growth of a group-IV ferromagnetic semiconductor, Mn x Ge 1− x , in which the Curie temperature is found to increase linearly with manganese (Mn) concentration from 25 to 116 kelvin. The p -type semiconducting character and hole-mediated exchange permit control of ferromagnetic order through application of a ±0.5-volt gate voltage, a value compatible with present microelectronic technology. Total-energy calculations within density-functional theory show that the magnetically ordered phase arises from a long-range ferromagnetic interaction that dominates a short-range antiferromagnetic interaction. Calculated spin interactions and percolation theory predict transition temperatures larger than measured, consistent with the observed suppression of magnetically active Mn atoms and hole concentration." @default.
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- W2140167371 date "2002-01-25" @default.
- W2140167371 modified "2023-10-11" @default.
- W2140167371 title "A Group-IV Ferromagnetic Semiconductor: Mn <sub> <i>x</i> </sub> Ge <sub> 1− <i>x</i> </sub>" @default.
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- W2140167371 doi "https://doi.org/10.1126/science.1066348" @default.
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