Numerical investigations on the switching behavior of magnetic tunnel junctions in the quasi-static and dynamic regime
Fachbereich Physik, Universität Kaiserslautern
Erwin-Schrödinger-Str. 56, 67663 Kaiserslautern, Germany
Accepted: 19 April 2001
Numerical investigations on the switching behavior of magnetic tunnel junctions based on the Landau-Lifshitz-Gilbert model are presented. The effects of stray fields and orange-peel coupling on the magnetization reversal process of the magnetic free layer are discussed. In the quasi-static regime only a shift and in special cases an additional rotation of the Stoner-astroid curve is observed. In contrast, in the dynamic regime, the parameter set for successful magnetization switching is completely different. In order to design devices capable of ultrafast switching, stray fields and coupling effects have to be suppressed to the largest possible degree.
PACS: 75.40.Mg – Numerical simulation studies / 75.70.-i – Magnetic properties of thin films, surfaces, and interfaces / 85.70.Kh – Magnetic thin film devices: magnetic heads (magnetoresistive, inductive, etc.); domain motion devices, etc
© EDP Sciences, 2001