Studenterkollokvium - Kristbjörg Anna Þórarinsdóttir: Magnetic anisotropy and interaction in amorphous thin film
Oplysninger om arrangementet
Supervisor: Jeppe Vang Lauritsen
The magnetic properties of thin films depend on their atomic structure. Crystalline thin films have atomic steps that can interfere with the interface structure. By using amorphous materials, we eliminate that problem, as the amorphous layers can have a excellent layer perfection and are highly uniform. Growing the amorphous magnetic layers in a constant magnetic field we can imprint in-plane uniaxial magnetic anisotropy. The coercivity, anisotropy and saturation moment can then be tuned through composition and growth mode. These layers will then be used to inspect proximity effect. The proximity effect is thought to be a short range effect, where a magnetic layer induces a ferromagnetic response in a paramagnetic layer adjacent to it. In this lecture I will present how it is possible to make magnetic amorphous layers with tunable magnetic properties and that we can induce a magnetic response in a 40nm thick paramagnetic layer.