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Experimental evidence for ferromagnetism at room temperature in MgO thin films
Royal Institute of Technology.
Royal Institute of Technology.
Royal Institute of Technology.
Royal Institute of Technology.
Vise andre og tillknytning
2010 (engelsk)Inngår i: JOURNAL OF PHYSICS-CONDENSED MATTER, ISSN 0953-8984, Vol. 22, nr 34, s. 345004-Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

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.

sted, utgiver, år, opplag, sider
Iop Publishing Ltd , 2010. Vol. 22, nr 34, s. 345004-
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Identifikatorer
URN: urn:nbn:se:liu:diva-58778DOI: 10.1088/0953-8984/22/34/345004ISI: 000280847200006OAI: oai:DiVA.org:liu-58778DiVA, id: diva2:345782
Tilgjengelig fra: 2010-08-27 Laget: 2010-08-27 Sist oppdatert: 2015-05-13

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