Polar magneto-optical Kerr effect studies of interlayer exchange coupling in Fe/Tb bilayers and Fe/Au/Tb trilayers
2002 (English)In: Semiconductor Physics, Quantum Electronics & Optoelectronics, Vol. 5, no 2, 212-216 p.Article in journal (Refereed) Published
Interlayer exchange coupling was studied. The investigations were carried out on bilayer (Fe/Tb) and trilayer (Fe/Au/Tb) ultrathin film structures. The films on silica substrate were prepared by electron-beam evaporation in an MBE system with a background pressure of (1 ·5) · 10-10 Torr and maintaining a pressure of (1 · 3) · 10-9 Torr during the film growth. To investigate these film structures polar magneto-optical Kerr effect was used. In bilayers the perpendicular magnetic anisotropy was observed. When a monolayer of Au was interposed at the interface, was observed to disappear. This is because of breaking the short-range interaction between Fe and Tb layers. Instead a long-range indirect exchange via nonmagnetic Au interlayer appears. The increase of Au interlayer thickness (3 · 35 Å) resulted in the oscillations of the Kerr angle. Analogous oscillations are distinctive to the RKKY model of interlayer exchange coupling.
Place, publisher, year, edition, pages
2002. Vol. 5, no 2, 212-216 p.
polar Kerr effect, exchange interaction, single interface, interfacial spacer, exchange coupling oscillations
Condensed Matter Physics
IdentifiersURN: urn:nbn:se:uu:diva-215366OAI: oai:DiVA.org:uu-215366DiVA: diva2:694482