The properties of pulsed laser deposited YH₂ films for switchable devices

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• 作者：Lokhorst ; A.C. ; Heijna ; M.C.R. ; Rector ; J.H. ; Giebels ; I.A.M.E. ; Koeman ; N.J ; Dam ; B.
• 关键词：Thin films ; Vapour deposition ; Light absorption and reflection
• 刊名：Journal of Alloys and Compounds
• 出版年：2003
• 期刊代码：45_09258388
• 类别：ms
• 出版时间：August 11, 2003
• 卷：356-357
• 期：Complete
• 页码：536-540
• 文件大小：639 K

摘要

In-situ deposited YH₂ films ranging from epitaxial to nanocrystalline were prepared by pulsed laser deposition (PLD). PLD has the advantage that the yttrium target acts as a hydrogen source. Comparing the switching behavior to that of MBE-grown, ex-situ loaded films, the PLD-films show a reduced optical and electrical contrast in switching, which is probably due to the formation of Y(OH)₃. On the other hand, we found that in the nanocrystalline PLD-films the hysteresis in switching is absent. Moreover, these films have a smoother surface morphology. Both effects are important for the implementation of switchable rare earth hydride films in all-solid-state devices.