The γ-Fe formation in epitaxial Cu(001)/Fe(001) thin films by the solid-state synthesis: Structural and magnetic features

摘要

The γ-Fe formation in epitaxial Cu(001)/Fe(001) bilayers with the annealing temperature increasing has been studied. Using Mossbauer spectroscopy, X-ray diffraction, and magnetic analysis, structural and chemical characterization of the interface between cooper and iron layers has been performed. After annealing at 850℃ and subsequent cooling to room temperature, paramagnetic γ-Fe(001) precipitates with an average size of 30nm coherent to a Cu(001) matrix form. Conditions of intermixing and the γ-Fe formation at the Cu/Fe interface are explained in terms of the solid-state synthesis in thin films. Specific features of the martensitic transition γ reversible α are discussed.