Magnetoelastic coupling in ferromagnetic films and surface stress studies on Ir(100) [Elektronische Ressource] / Zhen Tian

Magnetoelastic Coupling in Ferromagnetic Filmsand Surface Stress Studies on Ir(100)Dissertationzur Erlangung des akademischen Gradesdoctor rerum naturalium(Dr. rer. nat.)genehmigt durchMartin-Luther-Universit¨atHalle-Wittenbergvorgelegt vonFrau M. Sc. Zhen Tiangeboren am 06.01.1978 in Hebei, ChinaGutachter:1. Prof. Dr. Jur¨ gen Kirschner2. Prof. Dr. Wolf Widdra3. Prof. Dr. Reinhold KochHalle (Saale), March 28, 2008Verteidigungsdatum: February 19, 2008urn:nbn:de:gbv:3-000014123[http://nbn-resolving.de/urn/resolver.pl?urn=nbn%3Ade%3Agbv%3A3-000014123]AbstractMeasurements on the correlation between stress, strain and magnetic anisotropy ofepitaxial monolayers are performed in this work. To this end, mechanical stress duringfilm growth and stress during magnetization processes are measured directly by theoptical cantilever curvature technique.Epitaxial misfit induced film stress is measured for Fe, Ni and Co monolayers onIr(100). FilmstressesoftheorderofseveralGPaaredetected,whichareascribedtotheepitaxial misfit. The stress measurements also indicate structural and morphologicalchanges in the growing film. The first 2 monolayers of Fe on Ir(100) can be describedas a fcc precursor, which serve as a template for the subsequent growth of bcc Fe athigher thickness. Ni and Co are found to grow in a fcc phase on Ir.