Heterogeneous nucleation and metal-insulator transition in epitaxial films of NdNiO$_3$

Details Heterogeneous nucleation and metal-insulator transition in epitaxial films of NdNiO$_3$ Heterogeneous nucleation and metal-insulator transition in epitaxial films of NdNiO$_3$

2009-12-15

arxiv.org/abs/0912.2910v3

Journal of Applied Physics 108, 063503 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

7 pages, 4 figures

Scientific paper

We have investigated the temperature driven first order metal-insulator (M-I) transition in thin films of NdNiO$_3$ and have compared it with the bulk behavior. The M-I transition of thin films is sensitive to epitaxial strain and a partial relaxation of epitaxial strain creates an inhomogeneous strain field in the films which broadens the M-I transition. Both the thin film and the bulk samples exhibit non equilibrium features in the transition regime which are attributed to the presence of high temperature metallic phases in their supercooled state. The degree of supercooling in the thin films is found to be much smaller than in the bulk which suggests that the metal insulator transition in the thin film occurs through heterogeneous nucleation.

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