Integration of epitaxial La2/3Sr1/3MnO3 thin films on silicon-on-sapphire substrate for MEMS applications

[Display omitted] •Successful integration of oxides (SrTiO3, La2/3Sr1/3MnO3) on industrial compatible SOS wafers.•Successful fabrication of LSMO double clamped MEMS structures by silicon micromachining.•3D topography of MEMS micro-bridge structures visualized by digital holographic microscopy. We re...

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Veröffentlicht in:Applied surface science 2022-03, Vol.579, p.152095, Article 152095
Hauptverfasser: Chaluvadi, Sandeep Kumar, Wang, Zhe, Carvalho de Araújo, Laryssa M., Orgiani, Pasquale, Polewczyk, Vincent, Vinai, Giovanni, Rousseau, Olivier, Pierron, Victor, Pautrat, Alain, Domengès, Bernadette, Schlom, Darrell G., Méchin, Laurence
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Sprache:eng
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Zusammenfassung:[Display omitted] •Successful integration of oxides (SrTiO3, La2/3Sr1/3MnO3) on industrial compatible SOS wafers.•Successful fabrication of LSMO double clamped MEMS structures by silicon micromachining.•3D topography of MEMS micro-bridge structures visualized by digital holographic microscopy. We report the integration of high-quality epitaxial La2/3Sr1/3MnO3 (LSMO) thin films onto SrTiO3 buffered Silicon-on-Sapphire (SOS) substrates by combining state-of-the-art thin film growth techniques such as molecular beam epitaxy and pulsed laser deposition. Detailed structural, magnetic and electrical characterizations of the LSMO/STO/SOS heterostructures show that the LSMO film properties are competitive with those directly grown on oxide substrates. X-ray magnetic circular dichroism measurements on Mn L2,3 edges show strong dichroic signal at room temperature, and angular-dependent in-plane magnetic properties by magneto-optical Kerr magnetometry reveal isotropic magnetic anisotropy. Suspended micro-bridges were thus finally fabricated by silicon micromachining, thus demonstrating the potential use of integrating LSMO magnetic layer on industrially compatible SOS substrates for the development of applicative MEMS devices.
ISSN:0169-4332
1873-5584
DOI:10.1016/j.apsusc.2021.152095