Interface Reactions in LSMO鈥揗etal Hybrid Structures

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• 作者：Nico Homonnay ; Kerry J. 脫Shea ; Christian Eisenschmidt ; Martin Wahler ; Donald A. MacLaren ; Georg Schmidt
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：October 14, 2015
• 年：2015
• 卷：7
• 期：40
• 页码：22196-22202
• 全文大小：486K
• ISSN：1944-8252

文摘

Perovskites form a class of promising materials for the development of multifunctional devices but require reliable strategies for forming electrical contacts without compromising functionality. We explore the interactions of a range of metal contacts with ferromagnetic oxide La_0.7Sr_0.3MnO₃ (LSMO) and discuss their impact on the magnetic, structural, and chemical properties of the oxide. Although the noble metals gold and silver have negligible impact, metals typically used as adhesion layers, such as titanium and chromium, drive substantial reduction of the oxide, impairing its performance. These effects can be suppressed by inserting a thin barrier layer, such as the conductive oxide SrRuO₃.