Intrinsic room temperature ferromagnetism in boron-doped ZnO.

Authors :: Xu, X. G.
Yang, H. L.
Wu, Y.
Zhang, D. L.
Wu, S. Z.
Miao, J.
Jiang, Y.
Qin, X. B.
Cao, X. Z.
Wang, B. Y.
Source :: Applied Physics Letters; 12/6/2010, Vol. 97 Issue 23, p232502, 3p
Publication Year :: 2010
Abstract: We report room temperature ferromagnetism in boron-doped ZnO both experimentally and theoretically. The single phase Zn<subscript>1-x</subscript>B<subscript>x</subscript>O films deposited under high oxygen pressure by pulsed laser deposition show ferromagnetic behavior at room temperature. The saturation magnetization increases monotonically from 0 to 1.5 emu/cm<superscript>3</superscript> with the increasing boron component x from 0% to 6.8%. The first-principles calculations demonstrate that the ferromagnetism in the B-doped ZnO originates from the induced magnetic moment of oxygen atoms in the nearest neighbor sites to B-Zn vacancy pairs. The calculated total magnetic moment shows an increasing trend with the boron component which is consistent with experiment. [ABSTRACT FROM AUTHOR]