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

Document Type

Article

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.