Research Papers in Physics and Astronomy

 

Date of this Version

December 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.

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