Multiferroic and Piezoelectric Behavior of Transition-Metal Doped ZnO Films

Feng Pan; Xue Jing Liu; Yu Chao Yang; Cheng Song; Fei Zeng

doi:10.4028/www.scientific.net/MSF.620-622.735

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HomeMaterials Science ForumMaterials Science Forum Vols. 620-622Multiferroic and Piezoelectric Behavior of...

Multiferroic and Piezoelectric Behavior of Transition-Metal Doped ZnO Films

Abstract:

In this paper, we report the multiferroic and piezoelectric behavior observed in transition-metal doped ZnO films. The experimental results indicated that the Co-doped ZnO films deposited by magnetron sputtering possess a Curie temperature higher than 700K, and the magnetic moments of Co are intimatedly correlated to the doping concentration and the substrate. A giant magnetic moment of 6.1 B/Co is observed in (4 at.%) Co-doped ZnO films. Ferroelectric and ferromagnetic behaviors simultaneously were also obtained in V and Cr doped ZnO films on Pt(111)/Ti/SiO2/Si(100) substrates by reactive sputtering method, revealing a multiferroic nature. The high piezoelectric d33 coefficient 80-120 pm/V has also been achieved by Cr and V substitutions, which could make Cr-doped or V-doped ZnO a promising material in piezoelectric devices.