Ferromagnetism in Chemically-synthesized Co-doped ZnO

Title
Ferromagnetism in Chemically-synthesized Co-doped ZnO
Authors
Shalendra KumarY. J. KimB. H. KooHeekyu ChoiC. G. LeeS. K. SharmaM. KnobelSanjeev Gautam채근화
Keywords
ZnO; X-ray diffraction and absorption; Oxygen vacancy
Issue Date
2009-09
Publisher
Journal of the Korean Physical Society
Citation
VOL 55, NO 3, 1060-1064
Abstract
We report room temperature ferromagnetism (RTFM) in Co-doped ZnO (Zn1&#8722;xCoxO; x = 0.01 &#8722; 0.05) powder synthesized using a co-precipitation method. Our magnetometry data reveal a weak FM behavior at RT in the range 0.01 < x < 0.05. FM by magnetic FM moment steadily decreases with increasing dopant. The O K-edge near-edge X-ray absorption fine structure (NEXAFS) spectra indicate that O vacancies increases with increasing Co concentration and that the sample with x ≥ 0.03 has more broadening at 535 and 540 eV, which may be due to the oxygen vacancies. Co in the ZnO host reveals a +2 oxidation state via the K edge NEXAFS spectra.
URI
http://pubs.kist.re.kr/handle/201004/41869
ISSN
0374-4884
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE