Fabrication of fully epitaxial ZnO/Fe<sub>3sub>O<sub>4sub> heterostructures on conductive LaNiO<sub>3sub>
- 作者：P. Li ; M.Y. Sun ; H.L. Bai ; baihaili@tju.edu.cn
- 关键词：Epitaxial ZnO/Fe3O4 heterostructure ; Surface roughness ; Verwey transition
- 刊名：Thin Solid Films
- 出版年：2012
- 期刊代码：78_00406090
- 类别：ph
- 出版时间：1 July, 2012
- 卷：520
- 期：18
- 页码：5971-5976
- 文件大小：1197 K
摘要
Fully epitaxial ZnO(0001)/Fe<sub>3sub>O<sub>4sub>(111) spin injection heterostructures with LaNiO<sub>3sub>(111) conductive buffer layers were fabricated on SrTiO<sub>3sub>(111) by sputtering for the prospective spin injection experiments. Epitaxial growth of Fe<sub>3sub>O<sub>4sub> can be realized at temperatures higher than 673 K on LaNiO<sub>3sub>(111) substrates. The epitaxial relationship was determined to be . With the increase of LaNiO<sub>3sub> growth temperature, the surface of Fe<sub>3sub>O<sub>4sub> in the hybrid heterostructures becomes flatter whereas the magnetization of ZnO/Fe<sub>3sub>O<sub>4sub> decreases. A Verwey transition located at ~ 110 K was observed in all the ZnO/Fe<sub>3sub>O<sub>4sub> heterostructures, demonstrating the stoichiometry and good crystallinity of Fe<sub>3sub>O<sub>4sub>.