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Persistence of superconductivity in niobium ultrathin films grown on R-Plane Sapphire

Autor: Delacour, Cécile, Ortega, Luc, Faucher, Marc, Crozes, Thierry, Fournier, Thierry, Pannetier, Bernard, Bouchiat, Vincent

Publikováno v: Physical Review B, vol. 83, 144504 (2011)

We report on a combined structural and electronic analysis of niobium ultrathin films (from 2 to 10 nm) deposited in ultra-high vacuum on atomically flat R-plane sapphire wafers. A textured polycrystalline morphology is observed for the thinnest film

Externí odkaz: http://arxiv.org/abs/1102.0442

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Martensite structures and twinning in substrate-constrained epitaxial Ni-Mn-Ga films deposited by a magnetron co-sputtering process

Autor: Tillier, Jérémy, Bourgault, Daniel, Pairis, Sébastien, Ortega, Luc, Caillault, Nathalie, Carbone, Laurent

Publikováno v: Physics Procedia 10 (2010) 168

In order to obtain Ni-Mn-Ga epitaxial films crystallized in martensite structures showing Magnetic-Induced Rearrangement (MIR) of martensite variants, a fine control of the composition is required. Here we present how the co-sputtering process might

Externí odkaz: http://arxiv.org/abs/1101.3142

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Ni-Mn-Ga films in the austenite and the martensite structures at room temperature: Uniaxial texturation and epitaxial growth

Autor: Tillier, Jérémy, Einig, Antinéa, Bourgault, Daniel, Odier, Philippe, Ortega, Luc, Pairis, Sébastien, Porcar, Laureline, Chometon, Paul, Caillault, Nathalie, Carbone, Laurent

Publikováno v: Materials Research Society Symposia Proceedings 1200E (2010) G08-03

Ni-Mn-Ga films in the austenite and the martensite structures at room temperature have been obtained using the DC magnetron sputtering technique. Two elaboration processes were studied. A first batch of samples was deposited using a resist sacrificia

Externí odkaz: http://arxiv.org/abs/1101.2811

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Tuning macro-twinned domain sizes and the b-variants content of the adaptive 14-modulated martensite in epitaxial Ni-Mn-Ga films by co-sputtering

Autor: Tillier, Jérémy, Bourgault, Daniel, Odier, Philippe, Ortega, Luc, Pairis, Sébastien, Fruchart, Olivier, Caillault, Nathalie, Carbone, Laurent

Publikováno v: Acta Materiala 59 (2011) 75-81

In order to obtain modulated-martensite in our epitaxial Ni-Mn-Ga films, we have tuned the composition by using a co-sputtering process. Here we present how the composition affects the variant distribution of the 14-modulated martensite at room tempe

Externí odkaz: http://arxiv.org/abs/1011.2303

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