Magnetic and spectroscopic characteristics of ZnMnO system

Authors :: Pradhan, A.K.
Hunter, D.
Zhang, Kai
Dadson, J.B.
Mohanty, S.
Williams, T.M.
Lord, K.
Rakhimov, R.R.
Roy, U.N.
Cui, Y.
Burger, A.
Zhang, Jun
Sellmyer, D.J.
Source :: Applied Surface Science. Dec2005, Vol. 252 Issue 5, p1628-1633. 6p.
Publication Year :: 2005
Abstract: 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 6at.% 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 1mTorr. Although, crystalline quality of the film improves with increasing substrate temperature, the ferromagnetism becomes weaker. [Copyright &y& Elsevier]