Epitaxial refractory-metal buffer layers with a chemical gradient for adjustable lattice parameter and controlled chemical interface

Olivier Fruchart (1) , Anthony Rousseau (1) , Didier Schmaus (2) , A. L'Hoir (2) , Richard Haettel (3) , Luc Ortega (4)

1 NEEL - MNM - Micro et NanoMagnétisme
2 INSP - Institut des Nanosciences de Paris
3 NEEL - ExpE - Ingénierie Expérimentale
4 NEEL - X'Press - X'Press : diffraction et hautes pressions

We have developed and characterized the structure and composition of nanometers-thick solid-solution epitaxial layers of (V,Nb) on sapphire (11-20), displaying a continuous lateral gradient of composition from one to another pure element. Further covered with an ultrathin pseudomorphic layer of W, these provide a template for the fast combinatorial investigation of any growth or physical property depending of strain.

Domaines: Science des matériaux [cond-mat.mtrl-sci]

Olivier Fruchart, Anthony Rousseau, Didier Schmaus, A. L'Hoir, Richard Haettel, et al.. Epitaxial refractory-metal buffer layers with a chemical gradient for adjustable lattice parameter and controlled chemical interface. Applied Physics Letters, 2011, 98, pp.131906. ⟨10.1063/1.3567793⟩. ⟨hal-00558695⟩