Effective Size of Vacancies in the Sr1- 3x/2Cex/TiO3 Superstructure

Rick Ubic; Ganesanpotti Subodh; Mailadil T. Sebastian; Dclphine Gout; Thomas Proffen

doi:10.1002/9780470528990.ch20

Effective Size of Vacancies in the Sr_{1- 3x/2}Ce_x/TiO₃ Superstructure

Rick Ubic, Ganesanpotti Subodh, Mailadil T. Sebastian, Dclphine Gout, Thomas Proffen

Micron School of Materials Science and Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

22 Scopus citations

Abstract

Four compositions in the Sr_2-3x/2Ce_xTiO₃ homologous series corresponding to x = 0.1333, 0.1667, 0.1818, 0.25, and 0.4 have been synthesized by mixed-oxide processing and crystallographically characterized by electron diffraction. A non-cubic perovskite superlattice is observed for each composition caused by antiphase octahedral tilting. The degree of tilt increases with increasing x. Structural refinements of neutron diffraction data previously published indicate that the A-site size decreases with increasing x, but not as much as would be expected if vacancies were truly zero-dimensional defects; instead, A-site vacancies posses an effective finite size, presumably due to mutual repulsion of the coordinating oxygen ions. Based on these results, modifications to the predictive formula for pseudocubic lattice constant are proposed and seem successful for several systems with disordered A-site vacancies.

Original language	American English
Title of host publication	Advances in Electroceramic Materials:
Subtitle of host publication	A Collection of Papers Presented at the 2008 Materials Science and Technology Conference (MS and T08)
Editors	K.M. Nair, D. Suvorov, R.W. Schwartz, R. Guo
Pages	177-185
Number of pages	9
ISBN (Electronic)	9780470528990
DOIs	https://doi.org/10.1002/9780470528990.ch20
State	Published - 2009
Event	Advances in Electroceramic Materials - Pittsburgh, PA, United States Duration: 5 Oct 2008 → 9 Oct 2008

Publication series

Name	Ceramic Transactions
Volume	204
ISSN (Print)	1042-1122

Conference

Conference	Advances in Electroceramic Materials
Country/Territory	United States
City	Pittsburgh, PA
Period	5/10/08 → 9/10/08

Keywords

X-ray diffraction
electron diffraction
neutron diffraction
non-cubic perovskite superlattice
oxygen ions

EGS Disciplines

Materials Science and Engineering

Access to Document

10.1002/9780470528990.ch20License: Other

Cite this

Ubic, R., Subodh, G., Sebastian, M. T., Gout, D., & Proffen, T. (2009). Effective Size of Vacancies in the Sr_{1- 3x/2}Ce_x/TiO₃ Superstructure. In K. M. Nair, D. Suvorov, R. W. Schwartz, & R. Guo (Eds.), Advances in Electroceramic Materials: A Collection of Papers Presented at the 2008 Materials Science and Technology Conference (MS and T08) (pp. 177-185). (Ceramic Transactions; Vol. 204). https://doi.org/10.1002/9780470528990.ch20

Ubic, Rick ; Subodh, Ganesanpotti ; Sebastian, Mailadil T. et al. / Effective Size of Vacancies in the Sr_{1- 3x/2}Ce_x/TiO₃ Superstructure. Advances in Electroceramic Materials: A Collection of Papers Presented at the 2008 Materials Science and Technology Conference (MS and T08). editor / K.M. Nair ; D. Suvorov ; R.W. Schwartz ; R. Guo. 2009. pp. 177-185 (Ceramic Transactions).

@inproceedings{ddcbeddb22304f64a1ba6bef83e8eec4,

title = "Effective Size of Vacancies in the Sr1- 3x/2Cex/TiO3 Superstructure",

abstract = "Four compositions in the Sr2-3x/2CexTiO3 homologous series corresponding to x = 0.1333, 0.1667, 0.1818, 0.25, and 0.4 have been synthesized by mixed-oxide processing and crystallographically characterized by electron diffraction. A non-cubic perovskite superlattice is observed for each composition caused by antiphase octahedral tilting. The degree of tilt increases with increasing x. Structural refinements of neutron diffraction data previously published indicate that the A-site size decreases with increasing x, but not as much as would be expected if vacancies were truly zero-dimensional defects; instead, A-site vacancies posses an effective finite size, presumably due to mutual repulsion of the coordinating oxygen ions. Based on these results, modifications to the predictive formula for pseudocubic lattice constant are proposed and seem successful for several systems with disordered A-site vacancies.",

keywords = "X-ray diffraction, electron diffraction, neutron diffraction, non-cubic perovskite superlattice, oxygen ions",

author = "Rick Ubic and Ganesanpotti Subodh and Sebastian, {Mailadil T.} and Dclphine Gout and Thomas Proffen",

year = "2009",

doi = "10.1002/9780470528990.ch20",

language = "American English",

isbn = "9780470408445",

series = "Ceramic Transactions",

pages = "177--185",

editor = "K.M. Nair and D. Suvorov and R.W. Schwartz and R. Guo",

booktitle = "Advances in Electroceramic Materials:",

}

Ubic, R, Subodh, G, Sebastian, MT, Gout, D & Proffen, T 2009, Effective Size of Vacancies in the Sr_{1- 3x/2}Ce_x/TiO₃ Superstructure. in KM Nair, D Suvorov, RW Schwartz & R Guo (eds), Advances in Electroceramic Materials: A Collection of Papers Presented at the 2008 Materials Science and Technology Conference (MS and T08). Ceramic Transactions, vol. 204, pp. 177-185, Advances in Electroceramic Materials, Pittsburgh, PA, United States, 5/10/08. https://doi.org/10.1002/9780470528990.ch20

Effective Size of Vacancies in the Sr_{1- 3x/2}Ce_x/TiO₃ Superstructure. / Ubic, Rick; Subodh, Ganesanpotti; Sebastian, Mailadil T. et al.
Advances in Electroceramic Materials: A Collection of Papers Presented at the 2008 Materials Science and Technology Conference (MS and T08). ed. / K.M. Nair; D. Suvorov; R.W. Schwartz; R. Guo. 2009. p. 177-185 (Ceramic Transactions; Vol. 204).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Effective Size of Vacancies in the Sr1- 3x/2Cex/TiO3 Superstructure

AU - Ubic, Rick

AU - Subodh, Ganesanpotti

AU - Sebastian, Mailadil T.

AU - Gout, Dclphine

AU - Proffen, Thomas

PY - 2009

Y1 - 2009

N2 - Four compositions in the Sr2-3x/2CexTiO3 homologous series corresponding to x = 0.1333, 0.1667, 0.1818, 0.25, and 0.4 have been synthesized by mixed-oxide processing and crystallographically characterized by electron diffraction. A non-cubic perovskite superlattice is observed for each composition caused by antiphase octahedral tilting. The degree of tilt increases with increasing x. Structural refinements of neutron diffraction data previously published indicate that the A-site size decreases with increasing x, but not as much as would be expected if vacancies were truly zero-dimensional defects; instead, A-site vacancies posses an effective finite size, presumably due to mutual repulsion of the coordinating oxygen ions. Based on these results, modifications to the predictive formula for pseudocubic lattice constant are proposed and seem successful for several systems with disordered A-site vacancies.

AB - Four compositions in the Sr2-3x/2CexTiO3 homologous series corresponding to x = 0.1333, 0.1667, 0.1818, 0.25, and 0.4 have been synthesized by mixed-oxide processing and crystallographically characterized by electron diffraction. A non-cubic perovskite superlattice is observed for each composition caused by antiphase octahedral tilting. The degree of tilt increases with increasing x. Structural refinements of neutron diffraction data previously published indicate that the A-site size decreases with increasing x, but not as much as would be expected if vacancies were truly zero-dimensional defects; instead, A-site vacancies posses an effective finite size, presumably due to mutual repulsion of the coordinating oxygen ions. Based on these results, modifications to the predictive formula for pseudocubic lattice constant are proposed and seem successful for several systems with disordered A-site vacancies.

KW - X-ray diffraction

KW - electron diffraction

KW - neutron diffraction

KW - non-cubic perovskite superlattice

KW - oxygen ions

UR - http://www.scopus.com/inward/record.url?scp=70350441413&partnerID=8YFLogxK

UR - https://scholarworks.boisestate.edu/mse_facpubs/66/

U2 - 10.1002/9780470528990.ch20

DO - 10.1002/9780470528990.ch20

M3 - Conference contribution

SN - 9780470408445

T3 - Ceramic Transactions

SP - 177

EP - 185

BT - Advances in Electroceramic Materials:

A2 - Nair, K.M.

A2 - Suvorov, D.

A2 - Schwartz, R.W.

A2 - Guo, R.

T2 - Advances in Electroceramic Materials

Y2 - 5 October 2008 through 9 October 2008

ER -

Ubic R, Subodh G, Sebastian MT, Gout D, Proffen T. Effective Size of Vacancies in the Sr_{1- 3x/2}Ce_x/TiO₃ Superstructure. In Nair KM, Suvorov D, Schwartz RW, Guo R, editors, Advances in Electroceramic Materials: A Collection of Papers Presented at the 2008 Materials Science and Technology Conference (MS and T08). 2009. p. 177-185. (Ceramic Transactions). doi: 10.1002/9780470528990.ch20