Application of proton conduction of nickel oxide nanostructures to electrochromic devices

研究了离子导电在电子器件用缺陷诱导氧化物薄膜中的应用。首先，质子传导电解质的全干处理的电致变色电池被证明通过使用氢引入溅射制备的氢化Ta 2 O 5薄膜，即使纳米结构的NiO薄膜没有显示出任何预期的离子传导。其次，利用TiO 2-δ层中的氧空位输运，证明了TiO 2-δ/CoFeB铁磁叠层在电压作用下磁各向异性的非易失性变化。这一结果表明，一种新型的磁性器件驱动的氧化物中的离子导电的可能发展。

Applications of ionic conduction in defect-induced-oxide thin films for electrical devices were investigated. First, a proton-conducting electrolyte for an all-dry-processed electrochromic cell was demonstrated by using the hydrogenated-Ta2O5 films prepared by hydrogen-introduced sputtering, even though nano-structured NiO thin films did not show any expected ionic conductions. Next, voltage-induced nonvolatile change of magnetic anisotropy was demonstrated for TiO2-δ/ferromagnetic CoFeB stacks, by means of the oxygen vacancy transport in TiO2-δ layer. This result indicates a possible development of a new type of magnetic device driven by ionic conduction in oxides.