Dependence on γ-Fe and Cu thickness of magneto-optical Kerr effect for [γ-Fe/Cu] epitaxial multilayers

Abstract

Dependence on γ-Fe and Cu thickness of magneto-optical Kerr effect for [γ-Fe/Cu] epitaxial multilayers grown by MBE method has been investigated. The sub-valleys of the polar Kerr rotation spectrum and the thickness-dependent shift of them are observed. The sub-valley around 2.7eV could be attributed to the magneto-optical transition from the majority spin Δ₂ band to the QWS's majority spin Δ₁ band in the γ-Fe layer. In addition, the Cu thickness-dependent shift might arise from the shift of the QWS in the γ-Fe layer by the change of the electron property of γ-Fe accompanied with the change of Cu thickness.