Pulsed laser deposition-induced reduction of SrTiO3 crystals
Overview
Research
Identity
Additional Document Info
Other
View All
Overview
abstract
We report a generic method for fast and efficient reduction of strontium titanate (SrTiO 3 , STO) single crystals by pulsed laser deposition (PLD) of thin-films. The reduction was largely independent of the thin-film material deposited on the crystals. It is shown that thermodynamic conditions (450 C, 10 -7 torr, 10-60 min), which normally reduce STO (0 0 1) substrates to roughly 5 nm into a crystal substrate, can reduce the same crystals throughout their 500 m thickness when coupled with the PLD. In situ characterization of the STO substrate resistance during thin-film growth is presented. This process opens up the possibility of employing STO substrates as a back-gate in functional oxide devices. 2009 Acta Materialia Inc.