Structural, optical and magnetic properties of Eu-doped ZnO films

► Eu ions substitute for the Zn 2+ ions in the ZnO lattices. ► Room temperature ferromagnetism is obtained from Eu-doped ZnO films. ► The ferromagnetism is attributed to the intrinsic property of Eu-doped films ► The bound-magnetic-polaron is responsible for the ferromagnetism. Polycrystalline Zn 1−...

Full description

Saved in:

Bibliographic Details
Published in:	Journal of alloys and compounds 2011-05, Vol.509 (21), p.6321-6324
Main Authors:	Tan, Yongsheng, Fang, Zebo, Chen, Wei, He, Pimo
Format:	Article
Language:	eng
Subjects:	Condensed matter: electronic structure, electrical, magnetic, and optical properties Cross-disciplinary physics: materials science rheology Deposition by sputtering Diffraction Eu-doped ZnO films Exact sciences and technology Ferromagnetism Magnetic measurements Magnetic properties Magnetic properties and materials Magnetic properties of monolayers and thin films Magnetic properties of surface, thin films and multilayers Magnetron sputtering Materials science Methods of deposition of films and coatings film growth and epitaxy Optical properties Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation Optical properties of surfaces Physics Radio-frequency magnetron sputtering Silicon substrates Vapor phase epitaxy growth from vapor phase X-rays Zinc oxide
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	► Eu ions substitute for the Zn 2+ ions in the ZnO lattices. ► Room temperature ferromagnetism is obtained from Eu-doped ZnO films. ► The ferromagnetism is attributed to the intrinsic property of Eu-doped films ► The bound-magnetic-polaron is responsible for the ferromagnetism. Polycrystalline Zn 1− x Eu x O ( x = 0, 0.02, 0.05) films were deposited on silicon (1 0 0) substrates by radio-frequency magnetron sputtering. The structural, optical and magnetic properties of the films were investigated. The results from both the X-ray diffraction and photoluminescence spectra reveal that Eu 3+ ions successfully substitute for Zn 2+ ions in the ZnO lattice. The magnetic field and temperature dependence of magnetization curves demonstrate that the Zn 0.95Eu 0.05O films are ferromagnetic at room temperature. No impurity phase was found in Eu-doped films with X-ray diffraction, Raman spectroscopy and zero-field-cooled measurements. The ferromagnetism is attributed to the intrinsic property of Eu-doped ZnO films and could be interpreted by the bound-magnetic-polaron model.
ISSN:	0925-8388 1873-4669