Aghavnian, Thomas

Barbier, Antoine

Magnan, Hélène

Moussy, Jean-Baptiste

Rioult, Maxime

Rountree, Cindy,

Sarpi, Brice,

Stanescu, Dana

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Electrostriction, Electroresistance and Electromigration in Epitaxial BaTiO3 - based Heterostructures: Role of Interfaces and Electric Poling

Ferroelectric
materials hold significant promise for potential
applications in a number of fields including spintronics and solar
energy harvesting. When integrating them into heterostructures, it
becomes of crucial importance to master the ferroelectric properties
and to determine the influence of adjacent materials (substrates and/or
top layers). We studied the role of interfaces on the ferroelectric
properties of BaTiO3-based heterostructures elaborated
on 1 atom % Nb:SrTiO3 (001) and Pt (001) substrates. Poled
patterns were found to be more stable in time and shape for sandwich
structures when the BaTiO3 layer is covered by a nonferroelectric
oxide layer due to interface screening. Significant topography deformations
occur when poling was performed with voltages above a threshold value
and were found undoubtedly depending on both the nature of the substrate
and the voltage polarity. Maximum deformations occur for negative
poling voltages in BaTiO3 layers grown on Pt (001) and
for positive ones for BaTiO3 grown on 1 atom % Nb:SrTiO3 (001). In both cases, the step was associated with an increase
of the sample resistance. Clockwise and counterclockwise resistance
hysteresis loop cycles obtained for BaTiO3-based heterostructures
grown on Pt (001) and on 1 atom % Nb:SrTiO3 (001), respectively,
are understood by oxygen ions and vacancies migration through the
oxide layers depending on the substrate nature (oxide or antioxidant
metal). The present work provides a global view of ferroelectric thin
film behaviors and is important for the understanding of physical
phenomena occurring upon poling in nanometric ferroelectric layers

Dana Stanescu (2590318)

Helene Magnan (6726299)

Brice Sarpi (6726302)

Maxime Rioult (2590309)

Thomas Aghavnian (6726305)

Jean-Baptiste Moussy (4347289)

Cindy L. Rountree (6726308)

Antoine Barbier (2590315)

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Electrostriction, Electroresistance, and Electromigration
in Epitaxial BaTiO<sub>3</sub>‑Based Heterostructures: Role
of Interfaces and Electric Poling

Sarpi, Brice, B

Rountree, Cindy, Linn

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https://figshare.com/articles/Electrostriction_Electroresistance_and_Electromigration_in_Epitaxial_BaTiO_sub_3_sub_Based_Heterostructures_Role_of_Interfaces_and_Electric_Poling/8171210

Electrostriction, Electroresistance and Electromigration in Epitaxial BaTiO3 - based Heterostructures: Role of Interfaces and Electric Poling

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