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RESEARCH PRODUCT

Magnetic and structural investigations of ultra-thin Co–Fe alloy films on W(1 1 0)

H. J. ElmersM. Pratzer

subject

ParamagnetismMagnetizationKerr effectMaterials scienceFerromagnetismCondensed matter physicsMonolayerSubstrate (electronics)Thin filmCondensed Matter PhysicsVicinalElectronic Optical and Magnetic Materials

description

Abstract We investigated ultra-thin CoxFe1−x films on a flat and vicinal BCC W(1 1 0) surface with thicknesses between 1.8 and 7 monolayers (ML) using longitudinal Kerr magnetometry. We found a transition from magnetic bulk behavior between 3 and 4 ML to the monolayer. The maximum of the remnant Kerr signal that appears for thicker films at x=0.5 turns into a minimum for a sample thickness below 4 ML , while the specific Kerr-rotation per monolayer shows the well known bulk behavior. A similar magnetic behavior on the flat as well as on the stepped part of the substrate indicates that this is an intrinsic property. For x=0.5 the pseudomorphic monolayer is paramagnetic even when it is covered by ferromagnetic material.

yearjournalcountryeditionlanguage
2004-05-01Journal of Magnetism and Magnetic Materials
https://doi.org/10.1016/j.jmmm.2004.01.071