Experimental evidence for ferromagnetism at room-temperature in MgO thin films
2010 (English)In: Journal of Physics: Condensed Matter, ISSN 0953-8984, E-ISSN 1361-648X, 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
2010. Vol. 22, no 34, 345004- p.
IdentifiersURN: urn:nbn:se:kth:diva-14175DOI: 10.1088/0953-8984/22/34/345004ISI: 000280847200006ScopusID: 2-s2.0-77957135524OAI: oai:DiVA.org:kth-14175DiVA: diva2:331423
QC 20100722. Updated from submitted to published 201203272010-07-222010-07-222012-03-27Bibliographically approved