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Room Temperature Ferromagnetism and Band Gap Engineering in Mg Doped ZnO RF/DC Sputtered Films

Published online by Cambridge University Press:  05 April 2013

Sreekanth K. Mahadeva ,
Zhi-Yong Quan ,
Jin-Cheng Fan ,
Hasan B. Albargi ,
Gillian A Gehring ,
Anastasia V. Riazanova ,
Lyubov M. Belova  and
K. V. Rao
Sreekanth K. Mahadeva
Affiliation:
Department of Materials Science and Engineering, Royal Institute of Technology, Stockholm, SE 100 44, Sweden Department of Physics, Amrita Vishwa Vidyapeetham University, Amritapuri Campus, Kollam 690 525, Kerala, India
Zhi-Yong Quan
Affiliation:
Department of Materials Science and Engineering, Royal Institute of Technology, Stockholm, SE 100 44, Sweden Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education, Shanxi Normal University, Linfen 041004, China
Jin-Cheng Fan
Affiliation:
Department of Materials Science and Engineering, Royal Institute of Technology, Stockholm, SE 100 44, Sweden School of Materials and Engineering, Anhui University of Technology, Maanshan, 243002, China
Hasan B. Albargi
Affiliation:
Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH, U. K.
Gillian A Gehring
Affiliation:
Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH, U. K.
Anastasia V. Riazanova
Affiliation:
Department of Materials Science and Engineering, Royal Institute of Technology, Stockholm, SE 100 44, Sweden
Lyubov M. Belova
Affiliation:
Department of Materials Science and Engineering, Royal Institute of Technology, Stockholm, SE 100 44, Sweden
K. V. Rao
Affiliation:
Department of Materials Science and Engineering, Royal Institute of Technology, Stockholm, SE 100 44, Sweden
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Abstract

Mg doped ZnO thin films were prepared by DC/RF magnetron co-sputtering in (Ar+O2) ambient conditions using metallic Mg and Zn targets. We present a comprehensive study of the effects of film thickness on the structural, optical and magnetic properties. Room temperature ferromagnetism was observed in the films and the saturation magnetization (MS) increases at first as the film’s thickness increases and then decreases. The MS value as high as ∼15.76 emu/cm3 was achieved for the Mg-doped ZnO film of thickness 120 nm. The optical band gap of the films determined to be in the range 3.42 to 3.52 eV.

Keywords

sputteringferromagneticoptical properties
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1577: Symposium XX – Oxide Thin Films and Heterostructures for Advanced Information and Energy Technologies , 2013 , mrss13-1577-xx03-28
Copyright
Copyright © Materials Research Society 2013

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