Abstract
We prepare 100nm thick, epitaxial Ge100-(x+y)(Mnx,Fey) diluted films with Mn and Fe concentrations of several at% using a layer-by-layer deposition scheme at elevated temperature. We measure saturation magnetization mS versus temperature curves for a variety of (x,y) combinations and find for fixed temperatures a non-trivial dependence of mS on x and y. Within a certain window in the (x,y) parameter space Ge100-(x+y)(Mnx,Fey) exhibits a Curie temperature of 350K and mS≈ 10emu/cm2 at room temperature.
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