Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2010-06-15

Journal: MATERIALS LETTERS

Included Journals: Scopus、EI、SCIE

Volume: 64

Issue: 11

Page Number: 1291-1294

ISSN: 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.