Structural and magnetic properties of cobalt-doped ZnO thin films on sapphire (0001) substrate deposited by pulsed laser deposition

被引：28

作者：

Yang, Shanying ^{[1
]}

Lv, Rongqing ^{[1
]}

Wang, Changzheng ^{[2
]}

Liu, Yunyan ^{[3
]}

Song, Zeqing ^{[1
]}

机构：

[1] Laiwu Vocat & Tech Coll, Laiwu 271100, Shandong, Peoples R China

[2] Liaocheng Univ, Sch Phys Sci & Informat Engn, Liaocheng 252059, Shandong, Peoples R China

[3] Shandong Univ Technol, Sch Sci, Zibo 255049, Shandong, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2013年 / 579卷

关键词：

Thin films; Laser processing; Microstructure; Magentisation; Magnetic measurements; X-ray photoelectron spectroscopy;

D O I：

10.1016/j.jallcom.2013.07.113

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Co-doped ZnO thin films on sapphire (0001) substrates were deposited by PLD at various substrate temperatures in a one Pa oxygen ambient condition. The structural and magnetic properties of as-grown thin films were characterized by using XRD, UV-Visible absorption spectrophotometer, XPS and AGM. All samples possessed wurtzite hexagonal structure of ZnO. Co atoms incorporated into ZnO matrix and substituted for Zn in ZnO lattice, and Zn interstitials existed in as-grown thin films. The c-axis lattice constants of as-deposited thin films were larger than the standard data. Crystallization of as-prepared thin films increased and then decreased with substrate temperatures enhancing. All samples exhibited room-temperature ferromagnetism. The average moment per Co atom was much smaller than that of Co2+ (3d(7)), due to the different distribution of Co2+ ions and defects, as well as the different defect concentrations in thin films. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：628 / 632

页数：5

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