Effect of oxygen partial pressure on the local structure and magnetic properties of Co-doped ZnO films

Zn0.95Co0.05O films were prepared under different oxygen partial pressures (PO2) by inductively coupled plasma enhanced physical vapor deposition. The effect of PO2 on the local structure and magnetic properties was investigated. The x-ray absorption spectroscopy at the Co K-edge, Co L-edge, and O K...

Full description

Saved in:
Bibliographic Details
Published in:Journal of physics. Condensed matter 2008-01, Vol.20 (2), p.025208-025208 (5)
Main Authors: Liu, Xue-Chao, Shi, Er-Wei, Chen, Zhi-Zhan, Chen, Bo-Yuan, Zhang, Tao, Song, Li-Xin, Zhou, Ke-Jin, Cui, Ming-Qi, Yan, Wen-Sheng, Xie, Zhi, He, Bo, Wei, Shi-Qiang
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Magnetic properties and materials
Magnetic properties of monolayers and thin films
Magnetic properties of surface, thin films and multilayers
Physics
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Zn0.95Co0.05O films were prepared under different oxygen partial pressures (PO2) by inductively coupled plasma enhanced physical vapor deposition. The effect of PO2 on the local structure and magnetic properties was investigated. The x-ray absorption spectroscopy at the Co K-edge, Co L-edge, and O K-edge revealed that the main defects were oxygen vacancies when the films were deposited under very low PO2. The change from room-temperature ferromagnetism to paramagnetism was observed with increasing PO2. It was experimentally demonstrated that the oxygen vacancy defect is absolutely necessary to induce ferromagnetic couplings in Co-doped ZnO films.
ISSN:0953-8984
1361-648X
DOI:10.1088/0953-8984/20/02/025208