Epitaxial Growth of Room-Temperature Ferromagnetic MnAs Segments on GaAs Nanowires via Sequential Crystallization

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• 作者：Joachim Hubmann ; Benedikt Bauer ; Helmut S. K?rner ; Stephan Furthmeier ; Martin Buchner ; Günther Bayreuther ; Florian Dirnberger ; Dieter Schuh ; Christian H. Back ; Josef Zweck ; Elisabeth Reiger ; Dominique Bougeard
• 刊名：Nano Letters
• 出版年：2016
• 出版时间：February 10, 2016
• 年：2016
• 卷：16
• 期：2
• 页码：900-905
• 全文大小：372K
• ISSN：1530-6992

文摘

We investigate the incorporation of manganese into self-catalyzed GaAs nanowires grown in molecular beam epitaxy. Our study reveals that Mn accumulates in the liquid Ga droplet and that no significant incorporation into the nanowire is observed. Using a sequential crystallization of the droplet, we then demonstrate a deterministic and epitaxial growth of MnAs segments at the nanowire tip. This technique may allow the seamless integration of multiple room-temperature ferromagnetic segments into GaAs nanowires with high-crystalline quality.