Magnetization, magnetostriction and film stress of Fe monolayers on W(100)

Film stress, magnetization and magnetoelastic coupling are measured in situ by a simple optical deflection technique. This technique reveals that 2 nm thin Fe films grown on W(100) show magnetoelastic coupling that differs in both magnitude and sign from Fe bulk data. Stress contributions to the magnetoelastic coupling are discussed to describe this peculiar magnetoelastic behavior that is observed for Fe films thinner than 20 nm.