In situ magnetic domain imaging at the spin-reorientation transition of ultrathin Ni- and Fe/Ni-films
In order to characterize the spin-reorientation transition (SRT), i. e. the change of the easy axis of the magnetization, of ultrathin Ni/Cu(100)- and Fe/Ni/Cu(100)-films the magnetic domain structure was imaged as a function of the Ni and Fe layer thickness, respectively, by using spin-polarized low energy electron microscopy (SPLEEM) during the film growth in ultrahigh vacuum at 300 K. Whereas the size of the domains at the SRT of Ni/Cu(100) is some micrometers, the domain structure of the Fe/Ni-films breaks up into a pattern of 180 nm wide stripe domains. It was shown that the SRT of both Ni/Cu(100) and Fe/Ni/Cu(100) proceeds via a spiral-like rotation of the magnetization within the domains. A discontinuous SRT via coexisting in-plane and out-of-plane magnetized stripe domains is not observed for the film systems.
Advisor:Prof. Dr. Michael Farle; Prof. Dr. Werner Keune
School:Universität Duisburg-Essen, Standort Essen
Source Type:Master's Thesis
Keywords:physik astronomie universitaet duisburg essen
Date of Publication:02/03/2005