Suppression of Ferromagnetic Ordering in thicker co-sputtered Mn doped MgO Films
2013 (English)In: MRS Proceedings, Vol. 1552Article in journal (Refereed) Published
We report on preliminary studies of low (14 at.%) and high (53at.%) concentration Mn doped MgO films deposited by co-sputtering from metallic Mn and Mg targets. The structural, surface morphologies and magnetic properties of the films of different thickness were studied. All the as grown films are found to be amorphous and film surfaces are found to be flawless and homogeneous. We observe at room temperature robust ferromagnetic loops with a saturation magnetization value that is a function of film thickness reaching a maximum of ~38.5 emu/cm3 in the Mn0.53Mg0.47O film at a thickness of ~92 nm. In thicker films room-temperature ferromagnetic ordering is suppressed and eventually at a thickness around 120nm the expected diamagnetism of the bulk appears. The origin of ferromagnetism may be attributed to cation defects at the Mg-site.
Place, publisher, year, edition, pages
2013. Vol. 1552
Metallurgy and Metallic Materials
IdentifiersURN: urn:nbn:se:kth:diva-122634DOI: 10.1557/opl.2013.611ScopusID: 2-s2.0-84912018883OAI: oai:DiVA.org:kth-122634DiVA: diva2:623103
QC 201305242013-05-242013-05-242013-05-24Bibliographically approved