Coexistence of ultraviolet photo-response and room-temperature ferromagnetism in polycrystalline ZnO thin films
2010 (English)In: Materials letters (General ed.), ISSN 0167-577X, E-ISSN 1873-4979, ISSN 0167-577X, Vol. 64, no 11, 1291-1294 p.Article in journal (Refereed) Published
The coexistence of ultraviolet (UV) photoconductivity (PC) and room-temperature ferromagnetism (RTFM) is observed in polycrystalline ZnO thin films deposited by unbalanced magnetron sputtering under high oxygen pressure. A significant increase in PC (similar to 870% to 40000%) is observed with increasing film thickness and the consequent structural disorder and film porosity. In contrast, the saturation magnetization (M(S)) at room temperature is found to decrease from 1.02 emu/g to 0.53 emu/g with increasing film thickness from 50 to 150 nm.
Place, publisher, year, edition, pages
2010. Vol. 64, no 11, 1291-1294 p.
Photoconductivity, Room-temperature ferromagnetism, Unbalanced magnetron sputtering
IdentifiersURN: urn:nbn:se:kth:diva-14177DOI: 10.1016/j.matlet.2010.03.011ISI: 000278148900014ScopusID: 2-s2.0-77950516143OAI: oai:DiVA.org:kth-14177DiVA: diva2:331441
FunderSwedish Foundation for Strategic Research VinnovaSwedish Research CouncilCarl Tryggers foundation
QC 201007222010-07-222010-07-222014-04-11Bibliographically approved