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.
Publication Year :: 2010
Abstract: We report room temperature ferromagnetism in boron-doped ZnO both experimentally and theoretically. The single phase Zn1-xBxO films deposited under high oxygen pressure by pulsed-laser deposition show ferromagnetic behavior at room temperature. The saturation magnetization increases monotonously from 0 to 1.5 emu/cm3 with the increasing of B component x from 0 to 6.8%. The first-principles calculations based on density functional theory demonstrate that the ferromagnetism in B-doped ZnO originates from the induced magnetic moments of oxygen atoms in the nearest neighbor sites to the B-Zn vacancy pair. The calculated total magnetic moment increasing tendency with B component is well consistent with experiments.<br />Comment: 16 pages, 1 table, 4 figures.