Magnetic and spectroscopic characteristics of ZnMnO system

Authors

Aswini K. Pradhan, Center for Materials Research, Norfolk State UniversityFollow
D. Hunter, Norfolk State University, Norfolk, VA
Kai Zhang, Norfolk State University, Norfolk, VA
J.B. Dadson, Norfolk State University, Norfolk, VA
S. Mohanty, Norfolk State University, Norfolk, VA
T.M. Williams, Norfolk State University, Norfolk, VA
K. Lord, Norfolk State University, Norfolk, VA
R.R. Rakimhov, Norfolk State University, Norfolk, VA
U.N. Roy, Fisk University, Nashville, TN
Y. Cui, Fisk University, Nashville, TN
A. Burger, Fisk University, Nashville, TN
Jun Zhang, University of Nebraska - LincolnFollow
David J. Sellmyer, University of Nebraska-LincolnFollow

Date of this Version

12-15-2005

Comments

Published in Applied Surface Science, 252:5 (15 December 2005), pp. 1628–1633. Copyright © 2005 Elsevier B.V. Used by permission. http://www.springerlink.com/content/1573-1839/

Abstract

We report on the observation of room-temperature ferromagnetism in epitaxial (Zn,Mn)O films grown by a pulsed-laser deposition technique using high-density targets. The X-ray, microscopic, spectroscopic and magnetic properties of target material containing 6 at.% of Mn and films were compared. The target shows the presence of large clusters exhibiting paramagnetic behavior. However, ferromagnetic properties were observed in (Zn,Mn)O films grown at a substrate temperature of 500 °C and with an oxygen partial pressure of 1 mTorr. Although, crystalline quality of the film improves with increasing substrate temperature, the ferromagnetism becomes weaker.