Temperature-dependent stoichiometric alteration in ZnO:Mn nanostructured thin films for enhanced ferromagnetic response

被引：11
|
作者：
Ilyas, Usman [1 ,2 ]
Lee, P. [1 ]
Tan, T. L. [1 ]
Chen, R. [3 ]
Anwar, Abdul Waheed [2 ]
Zhang, Sam [4 ]
Sun, H. D. [3 ]
Rawat, R. S. [1 ]
机构：
[1] Nanyang Technol Univ, NSSE, NIE, 1 Nanyang Walk, Singapore 637616, Singapore
[2] Univ Engn & Technol, Dept Phys, Lahore 54890, Pakistan
[3] Nanyang Technol Univ, Div Phys & Appl Phys, Singapore 637371, Singapore
[4] Nanyang Technol Univ, Sch Mech & Aerosp Engn, Singapore 639798, Singapore
来源：
APPLIED SURFACE SCIENCE | 2016年 / 387卷
关键词：
ZnO:Mn nanostructured thin films; Ferromagnetism; Photoluminescence; MN-DOPED ZNO; OXYGEN PARTIAL-PRESSURE; OPTICAL-PROPERTIES; PHOTOLUMINESCENCE;
D O I：
10.1016/j.apsusc.2016.06.138
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：
The study investigates the effect of in-situ substrate temperature and argon-oxygen ambient gas pressure of pulsed laser deposition facility on material composition, optical quality and magnetic response of ZnO:Mn thin films. Structural and optical analyses revealed the existence of an optimal in-situ substrate temperature (450 degrees C) at which thin films showed relatively better texture and optical quality with minimum concentration of structural defects. The detailed analysis of Zn 2p(3/2) and O 1s core level XPS spectra revealed that the structural disorder was considerably reduced in thin films after being annealed (in-situ) at substrate temperature of 450 degrees C. Magnetic measurements revealed the stronger p-d hybridization between oxygen 2p and Mn 3d orbitals in ZnO:Mn thin films being annealed in-situ at 450 degrees C under Ar:O-2 admixture of 2.5 mbar subsequently leading to improved ferromagnetic response. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：461 / 468
页数：8
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