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Indexed by:期刊论文

Date of Publication:2010-06-15

Journal:MATERIALS LETTERS

Included Journals:SCIE、EI、Scopus

Volume:64

Issue:11

Page Number:1291-1294

ISSN No.:0167-577X

Key Words:Unbalanced magnetron sputtering; Photoconductivity; Room-temperature ferromagnetism

Abstract: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. (C) 2010 Elsevier B.V. All rights reserved.