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Issue 76, 2016
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Transformation of epitaxial NiMnGa/InGaAs nanomembranes grown on GaAs substrates into freestanding microtubes

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Abstract

We report the fabrication of Ni2.7Mn0.9Ga0.4/InGaAs bilayers on GaAs (001)/InGaAs substrates by molecular beam epitaxy. To form freestanding microtubes the bilayers have been released from the substrate by strain engineering. Microtubes with up to three windings have been successfully realized by tailoring the size and strain of the bilayer. The structure and magnetic properties of both, the initial films and the rolled-up microtubes, are investigated by electron microscopy, X-ray techniques and magnetization measurements. A tetragonal lattice with c/a = 2.03 (film) and c/a = 2.01 (tube) is identified for the Ni2.7Mn0.9Ga0.4 alloy. Furthermore, a significant influence of the cylindrical geometry and strain relaxation induced by roll-up on the magnetic properties of the tube is found.

Graphical abstract: Transformation of epitaxial NiMnGa/InGaAs nanomembranes grown on GaAs substrates into freestanding microtubes

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Publication details

The article was received on 26 May 2016, accepted on 15 Jul 2016 and first published on 01 Aug 2016


Article type: Paper
DOI: 10.1039/C6RA13684B
Citation: RSC Adv., 2016,6, 72568-72574
  • Open access: Creative Commons BY license
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    Transformation of epitaxial NiMnGa/InGaAs nanomembranes grown on GaAs substrates into freestanding microtubes

    C. Müller, I. Neckel, M. Monecke, V. Dzhagan, G. Salvan, S. Schulze, S. Baunack, T. Gemming, S. Oswald, V. Engemaier and D. H. Mosca, RSC Adv., 2016, 6, 72568
    DOI: 10.1039/C6RA13684B

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