DPG Phi
Verhandlungen
Verhandlungen
DPG

Regensburg 2019 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

MA: Fachverband Magnetismus

MA 47: Magnetic anisotropy in thin films

MA 47.2: Vortrag

Donnerstag, 4. April 2019, 11:45–12:00, H53

Ru overcoat-induced anomalous magneto-optical behavior of Co films — •Patricia Riego1,2, Lorenzo Fallarino3, Jon Ander Arregi1, Sara Arias1, and Andreas Berger11CIC nanoGUNE, San Sebastian, Spain — 2University of the Basque Country, Bilbao, Spain — 3HZDR, Dresden, Germany

We studied the effect of ultrathin Ru overcoats onto the magnetic and magneto-optical properties of thin Co films with in-plane uniaxial anisotropy by means of generalized magneto-optical ellipsometry. This methodology can determine the full reflection matrix of any planar sample and thus separate optical from magneto-optical effects, as well as separate longitudinal, transverse and polar Kerr effects from each other. For reference samples without Ru overcoat, all experimental results can be consistently explained via a macrospin-type in-plane magnetization reversal. However, the addition of the Ru overcoat leads to an anomalous magneto-optical behavior that is not consistent with the magnetization reversal path observed in the overcoat-free films. The quantitative extent of this anomaly initially increases very strongly with increasing Ru thickness and saturates when the Ru overcoat thickness reaches 1.5 nm, which is indicative of the effect's interfacial origin. This is corroborated by the fact that the insertion of a 2-nm-thick SiO2 layer in between Co and Ru makes the anomaly disappear. The dependence of this effect with the Co film thickness is also consistent with it being an interface phenomenon.

100% | Mobil-Ansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2019 > Regensburg