Magneto-Optical Properties of Ni:ZnO Nanorods

Author

Chiu, S.H. ; Hsu, H.S. ; Huang, J.C.A.

Author_Institution

Phys. Dept., Nat. Cheng Kung Univ., Tainan, Taiwan

Volume

48

Issue

11

fYear

2012

Firstpage

3933

Lastpage

3935

Abstract

The structure, electrical, and magneto-optical properties of as-grown and hydrogenated annealed Ni:ZnO nanorods (NRs) have been systematically investigated. X-ray absorption spectroscopy shows that most of the Ni dopants were incoporated in the ZnO matrix. Noticeable magneto-optical effect together with room temperature ferromagnetism were observed in Ni:ZnO NRs. A broad optical magnetic circular dichroism (OMCD) spectra with larger amplitude is observed for the hydrogenated annealed Ni:ZnO NRs, while nonmagnetic state and no OMCD feature was observed in ZnO NRs. The enhancement in magnetization and OMCD singal are highly related to the oxygen vacancies due to hydrogenated annealing.

Keywords

II-VI semiconductors; doping profiles; ferromagnetic materials; magnetic circular dichroism; magnetisation; nanofabrication; nanomagnetics; nanorods; nickel; semiconductor growth; vacancies (crystal); wide band gap semiconductors; zinc compounds; X-ray absorption spectroscopy; ZnO:Ni; broad optical magnetic circular dichroism spectra; dopants; electrical properties; ferromagnetism; hydrogenated annealing; magnetization; magneto-optical properties; nanorods; oxygen vacancies; structure properties; temperature 293 K to 298 K; Absorption; Annealing; Argon; Magnetic properties; Nickel; Zinc oxide; Hydrothermal; ZnO; magnetic circular dichroism; nanorods;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2012.2198621

Filename

6332665