Here, we report that small but well-defined negative differential resistance (NDR) steps can be observed at critical voltages in unpatterned millimeter-scale manganite films of Pr 0.65(Ca 0.75Sr 0.25) 0.35MnO 3. We systematically investigate the magneto-transport properties of strained thin films grown on LaAlO 3 and SrTiO 3 substrates and map out their phase diagrams which show temperature- and magnetic-field-dependent electronic phase separation (EPS). Our data suggest that the onset of NDR only occurs deep within the regions of EPS, underscoring the subtle nature of filamentary transport in manganite thin films with competing phases.
|Original language||English (US)|
|Journal||Applied Physics Letters|
|State||Published - Feb 6 2012|
Bibliographical noteFunding Information:
We acknowledge the financial support from the Singapore National Research Foundation.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)