TITLE

Enhanced thermal stability of Pt electrodes for flat epitaxial biferroic-YMnO3/Pt heterostructures

AUTHOR(S)
Bachelet, R.; Muralidharan, R.; Rigato, F.; Dix, N.; Martí, X.; Santiso, J.; Sánchez, F.; Fontcuberta, J.
PUB. DATE
November 2009
SOURCE
Applied Physics Letters;11/2/2009, Vol. 95 Issue 18, p181907
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We have investigated the thermal stability of platinum electrodes on oxide substrates for oxide-based devices. We show that flat epitaxial Pt(111) bottom electrodes, deposited on SrTiO3(111) and Al2O3(0001) substrates, can be stable against dewetting up to usual oxide-deposition temperatures (Ts) by increasing Pt film thickness (tPt) and preferably using SrTiO3(111) rather than Al2O3(0001) substrates. Subsequently, high-quality epitaxial biferroic YMnO3/Pt/oxide-substrate heterostructures have been grown. A diagram of morphological and crystalline quality versus tPt and Ts is given for both YMnO3/Pt/SrTiO3(111) and YMnO3/Pt/Al2O3(0001) heterostructures. These results shall guideline the growth of other functional oxide thin films on Pt electrodes.
ACCESSION #
45036547

 

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