Structural evidence for enhanced polarization in a commensurate short-period BaTiO 3/SrTiO 3 superlattice

W. Tian; J. C. Jiang; X. Q. Pan; J. H. Haeni; Y. L. Li; L. Q. Chen; D. G. Schlom; J. B. Neaton; K. M. Rabe; Q. X. Jia

doi:10.1063/1.2335367

Structural evidence for enhanced polarization in a commensurate short-period BaTiO ₃/SrTiO ₃ superlattice

W. Tian, J. C. Jiang, X. Q. Pan, J. H. Haeni, Y. L. Li, L. Q. Chen, D. G. Schlom, J. B. Neaton, K. M. Rabe, Q. X. Jia

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Abstract

A short-period (BaTiO ₃) ₆/(SrTiO ₃) ₅ superlattice was characterized by x-ray diffraction and transmission electron microscopy. The superlattice is epitaxially oriented with the c axes of BaTiO ₃ and SrTiO ₃ normal to the (001) surface of the SrTiO ₃ substrate. Despite the large in-plane lattice mismatch between BaTiO ₃ and SrTiO ₃ (∼2.2%), the superlattice interfaces were found to be nearly commensurate. The crystallographic c/a ratio of the superlattice was measured and the results agree quantitatively with first-principles calculations and phase-field modeling. The agreement supports the validity of the enhanced spontaneous polarization predicted for short-period BaTiO ₃/SrTiO ₃ superlattices.

Original language	English (US)
Article number	092905
Journal	Applied Physics Letters
Volume	89
Issue number	9
DOIs	https://doi.org/10.1063/1.2335367
State	Published - 2006

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.2335367

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@article{14b47abd564840789d3d8442069ab40c,

title = "Structural evidence for enhanced polarization in a commensurate short-period BaTiO 3/SrTiO 3 superlattice",

abstract = "A short-period (BaTiO 3) 6/(SrTiO 3) 5 superlattice was characterized by x-ray diffraction and transmission electron microscopy. The superlattice is epitaxially oriented with the c axes of BaTiO 3 and SrTiO 3 normal to the (001) surface of the SrTiO 3 substrate. Despite the large in-plane lattice mismatch between BaTiO 3 and SrTiO 3 (∼2.2%), the superlattice interfaces were found to be nearly commensurate. The crystallographic c/a ratio of the superlattice was measured and the results agree quantitatively with first-principles calculations and phase-field modeling. The agreement supports the validity of the enhanced spontaneous polarization predicted for short-period BaTiO 3/SrTiO 3 superlattices.",

author = "W. Tian and Jiang, {J. C.} and Pan, {X. Q.} and Haeni, {J. H.} and Li, {Y. L.} and Chen, {L. Q.} and Schlom, {D. G.} and Neaton, {J. B.} and Rabe, {K. M.} and Jia, {Q. X.}",

note = "Funding Information: The authors acknowledge the support of the National Science Foundation through Grant No. DMR-0507146.",

year = "2006",

doi = "10.1063/1.2335367",

language = "English (US)",

volume = "89",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics",

number = "9",

}

TY - JOUR

T1 - Structural evidence for enhanced polarization in a commensurate short-period BaTiO 3/SrTiO 3 superlattice

AU - Tian, W.

AU - Jiang, J. C.

AU - Pan, X. Q.

AU - Haeni, J. H.

AU - Li, Y. L.

AU - Chen, L. Q.

AU - Schlom, D. G.

AU - Neaton, J. B.

AU - Rabe, K. M.

AU - Jia, Q. X.

N1 - Funding Information: The authors acknowledge the support of the National Science Foundation through Grant No. DMR-0507146.

PY - 2006

Y1 - 2006

N2 - A short-period (BaTiO 3) 6/(SrTiO 3) 5 superlattice was characterized by x-ray diffraction and transmission electron microscopy. The superlattice is epitaxially oriented with the c axes of BaTiO 3 and SrTiO 3 normal to the (001) surface of the SrTiO 3 substrate. Despite the large in-plane lattice mismatch between BaTiO 3 and SrTiO 3 (∼2.2%), the superlattice interfaces were found to be nearly commensurate. The crystallographic c/a ratio of the superlattice was measured and the results agree quantitatively with first-principles calculations and phase-field modeling. The agreement supports the validity of the enhanced spontaneous polarization predicted for short-period BaTiO 3/SrTiO 3 superlattices.

AB - A short-period (BaTiO 3) 6/(SrTiO 3) 5 superlattice was characterized by x-ray diffraction and transmission electron microscopy. The superlattice is epitaxially oriented with the c axes of BaTiO 3 and SrTiO 3 normal to the (001) surface of the SrTiO 3 substrate. Despite the large in-plane lattice mismatch between BaTiO 3 and SrTiO 3 (∼2.2%), the superlattice interfaces were found to be nearly commensurate. The crystallographic c/a ratio of the superlattice was measured and the results agree quantitatively with first-principles calculations and phase-field modeling. The agreement supports the validity of the enhanced spontaneous polarization predicted for short-period BaTiO 3/SrTiO 3 superlattices.

UR - http://www.scopus.com/inward/record.url?scp=33748251855&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33748251855&partnerID=8YFLogxK

U2 - 10.1063/1.2335367

DO - 10.1063/1.2335367

M3 - Article

AN - SCOPUS:33748251855

SN - 0003-6951

VL - 89

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 9

M1 - 092905

ER -

Structural evidence for enhanced polarization in a commensurate short-period BaTiO ₃/SrTiO ₃ superlattice

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