Interfacial diffusion and exchange bias in the oxide multilayer Zn 0.7Ni 0.3Fe 2O 4/BiFeO 3/SrTiO 3

Wei Jui Lin, Xiaoding Qi

研究成果: Article同行評審


The aim of this work is to fabricate an all-oxide spin valve using multiferroic BiFeO 3 as the antiferromagnetic pinning layer, in the hope that we may be able to switch magnetoresistance electrically. The proposed architecture is Zn 0.7Ni 0.3Fe 2O 4/ Sr 1-xLa xTiO 3/ Zn 0.7Ni 0.3Fe 2O 4/ BiFeO 3/ LaNiO 3/SrTiO 3. We have demonstrated that such a multilayer structure can be grown epitaxially by the RF magnetron sputtering. X-ray diffraction showed that the films were indeed biaxially aligned with reasonable in-plane and out-of-plane textures, under the growth conditions optimised for achieving good ferroelectric and magnetic properties. X-ray photoelectron spectroscopy depth profiling showed that there was significant Bi diffusion across the interface if the BiFeO 3 film was not stabilised in high oxygen ambience after deposition. High-resolution transmission electron microscopy showed a tidy and sharp Zn 0.7Ni 0.3Fe 2O 4/ BiFeO 3 boundary for the Zn 0.7Ni 0.3Fe 2O 4 films grown at 550 °C, while for the films grown at higher temperature an irregular interface was observed. Under the optimum growth condition, a clear exchange bias was achieved at the Zn 0.7Ni 0.3Fe 2O 4/ BiFeO 3 interface.

頁(從 - 到)1026-1029
期刊Surface and Interface Analysis
出版狀態Published - 2012 八月

All Science Journal Classification (ASJC) codes

  • 化學 (全部)
  • 凝聚態物理學
  • 表面和介面
  • 表面、塗料和薄膜
  • 材料化學


深入研究「Interfacial diffusion and exchange bias in the oxide multilayer Zn <sub>0.7</sub>Ni <sub>0.3</sub>Fe <sub>2</sub>O <sub>4</sub>/BiFeO <sub>3</sub>/SrTiO <sub>3</sub>」主題。共同形成了獨特的指紋。