Magnetostatic interactions in bilayer films
Dpto. Física de Materiales, Fac. CC. Físicas, Univ.
Complutense, 28040 Madrid, Spain
2 ISOM, ETSI Telecomunicación, Univ. Politécnica, 28040 Madrid, Spain
Corresponding author: email@example.com
Revised: 6 May 2004
Accepted: 15 June 2004
Published online: 25 August 2004
In this paper we report a study of the magnetostatic coupling of square dot films and strips of films of Permalloy/Copper/Permalloy (200/20/200 nm). Results show a good magnetostatic coupling which leads to a monodomain structure in the case of square dots as it is observed from hysteresis loops. These monodomain structures appear to be stable for a wider range of dot dimensions rather than in monolayers. Magnetic simulations also support the existence of these kind of magnetic structures. Results obtained for strips are also reported. These samples exhibit a multidomain structure where it is possible to observe a coupling between domains and also between domain walls in the different magnetic layers.
PACS: 75.40.Mg – Numerical simulation studies / 75.60.Ch – Domain walls and domain structure
© EDP Sciences, 2004