Abstract
Optical lithography is used to fabricate LPCMO wires starting from a single (LPCMO) film epitaxially grown on a substrate. As the width of the wires is decreased, the resistivity of the LPCMO wires exhibits giant and ultrasharp steps upon varying temperature and magnetic field in the vicinity of the metal-insulator transition. The origin of the ultrasharp transitions is attributed to the effect of spatial confinement on the percolative transport in manganites.
- Received 1 August 2006
DOI:https://doi.org/10.1103/PhysRevLett.97.167201
©2006 American Physical Society