The Composition Dependence of Some Electrical Properties of FeSix Thin Films

Abstract
The composition dependence of the Seebeck coefficients and the microstructures of FeSi x thin films were studied. In the region of x2.08, the Seebeck coefficient is negative. From the results of the d-spacing measurements, it is inferred that the excess Si in the sample with x>2.08 induces structural defects in the FeSi2, which provides the donor.