DPG Phi
Verhandlungen
Verhandlungen
DPG

Regensburg 2013 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

MA: Fachverband Magnetismus

MA 26: Magnetic Thin Films I of 2

MA 26.8: Talk

Wednesday, March 13, 2013, 11:30–11:45, H3

Out-of-plane vectorial magnetometry on a thin (CoFe)77Tb23 film investigated by a new multichromatic dual-beam magnetometer based on the magnetooptic Kerr effect — •Timo Kuschel, Gerhard Götz, Zoe Kugler, and Günter Reiss — University of Bielefeld, Germany

Magnetic thin films with out-of-plane (OOP) magnetic easy axis are key components for spintronic devices like magnetic tunnel junctions which use OOP magnetization. Current investigations focus on thin (CoFe)1−xTbx films which are partially preferred OOP magnetized.

In order to illustrate the OOP reversal process of the magnetization in such magnetic systems a detailed vectorial magnetometry study is performed on an exemplary (CoFe)77Tb23 film. A new home-built multichromatic dual-beam magnetometer is used for the measurements based on the magnetooptic Kerr effect. The components of the magnetization vector during the reversal process can be determined using s- and p-polarized incident light and varied azimuthal sample alignment with respect to the plane of incidence of light.

The results show a monodomain remanent state which is not completely OOP aligned. The observed details of the reversal process reveal a coherent rotation of the magnetization from OOP alignment (0) in magnetic saturation to more than 45 tilting for small reversed OOP magnetic field strength. During the magnetic switching the magnetic moment of the film is decreased down to less than 25% due to domain splitting. Afterwards, the monodomain state is reached again and the magnetization rotates coherently into reversed OOP direction.

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2013 > Regensburg