Combinatorial Growth and Anisotropy Control of Self-Assembled Epitaxial Ultrathin Alloy Nanowires

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• 作者：Francisco Javier Bonilla ; Anastasiia Novikova ; Franck Vidal ; Yunlin Zheng ; Emiliano Fonda ; Dominique Demaille ; Vivien Schuler ; Alessandro Coati ; Alina Vlad ; Yves Garreau ; Mich猫le Sauvage Simkin ; Yves Dumont ; Sarah Hidki ; Victor Etgens
• 刊名：ACS Nano
• 出版年：2013
• 出版时间：May 28, 2013
• 年：2013
• 卷：7
• 期：5
• 页码：4022-4029
• 全文大小：1706K
• 年卷期：v.7,no.5(May 28, 2013)
• ISSN：1936-086X

文摘

Self-assembled vertical epitaxial nanostructures form a new class of heterostructured materials that has emerged in recent years. Interestingly, such kind of architectures can be grown using combinatorial processes, implying sequential deposition of distinct materials. Although opening many perspectives, this combinatorial nature has not been fully exploited yet. This work demonstrates that the combinatorial character of the growth can be further exploited in order to obtain alloy nanowires coherently embedded in a matrix. This issue is illustrated in the case of a fully epitaxial system: Co_xNi_1鈥?i>x nanowires in CeO₂/SrTiO₃(001). The advantage brought by the ability to grow alloys is illustrated by the control of the magnetic anisotropy of the nanowires when passing from pure Ni wires to Co_xNi_1鈥?i>x alloys. Further exploitation of this combinatorial approach may pave the way toward full three-dimensional heteroepitaxial architectures through axial structuring of the wires.

Keywords:

self-assembly; heteroepitaxy; nanowires; CoNi alloys; magnetic anisotropy