Experimental evidence for ferromagnetism at room temperature in MgO thin films
2010 (English)In: JOURNAL OF PHYSICS-CONDENSED MATTER, ISSN 0953-8984, Vol. 22, no 34, 345004- p.Article in journal (Refereed) Published
Ferromagnetic ordering at room temperature (RTFM) in MgO thin films deposited by RF magnetron sputtering under various atmospheric conditions and temperatures is reported. A saturation magnetization (MS) value as high as 1.58 emu g(-1) is (0.046 mu B/unit cell) observed for a 170 nm film deposited at RT under an oxygen pressure of 1.3 x 10(-4) mbar. In contrast, films deposited at elevated temperature (under an identical oxygen pressure), or at higher oxygen pressures, as well as under a nitrogen atmosphere at RT show significantly suppressed magnetization. The ferromagnetic order in the MgO matrix is believed to be defect induced.
Place, publisher, year, edition, pages
Iop Publishing Ltd , 2010. Vol. 22, no 34, 345004- p.
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-58778DOI: 10.1088/0953-8984/22/34/345004ISI: 000280847200006OAI: oai:DiVA.org:liu-58778DiVA: diva2:345782