Publication Type : Conference Paper
Publisher : Symposium S – Nanostructured Metal Oxides for Advanced Applications
Source : Symposium S – Nanostructured Metal Oxides for Advanced Applications (2013)
Url : http://journals.cambridge.org/article_S1946427413006118
Campus : Coimbatore
School : School of Engineering
Department : Sciences
Verified : Yes
Year : 2013
Abstract : 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.
Cite this Research Publication : Dr. Sreekanth K. M., Quan, Z. - Y., Fan, J. C., Sreelatha, K. S., Belova, L., Puzniak, R., and Rao, K. V., “Suppression of Ferromagnetic Ordering in thicker co-sputtered Mn doped MgO Films”, in Symposium S – Nanostructured Metal Oxides for Advanced Applications, 2013.