Defect stabilized periodic amplitude modulations in ferroelectrics

Wenwu Cao

doi:10.1080/01411599508200426

Defect stabilized periodic amplitude modulations in ferroelectrics

Wenwu Cao

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

Theoretical analysis shows that the total free energy of a ferroelectric system with free boundary conditions increases with the number of the inhomogeneous regions, such as domain walls and other modulated structures. However, charged defects could lower the total energy of a ferroelectric system by interacting with charge density fluctuations in inhomogeneous regions. We discuss a special kind of inhomogeneous microstructure in a lanthanum doped lead titanate, the amplitude modulations, which can be stabilized by aliovalent dopants.

Original language	English (US)
Pages (from-to)	69-78
Number of pages	10
Journal	Phase Transitions
Volume	55
Issue number	1-4
DOIs	https://doi.org/10.1080/01411599508200426
State	Published - Dec 1 1995

All Science Journal Classification (ASJC) codes

Instrumentation
General Materials Science

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10.1080/01411599508200426

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title = "Defect stabilized periodic amplitude modulations in ferroelectrics",

abstract = "Theoretical analysis shows that the total free energy of a ferroelectric system with free boundary conditions increases with the number of the inhomogeneous regions, such as domain walls and other modulated structures. However, charged defects could lower the total energy of a ferroelectric system by interacting with charge density fluctuations in inhomogeneous regions. We discuss a special kind of inhomogeneous microstructure in a lanthanum doped lead titanate, the amplitude modulations, which can be stabilized by aliovalent dopants.",

author = "Wenwu Cao",

note = "Funding Information: The author is indebted to Drs. G.R. Barsch, J.A. Krumhansl, C.A. Randall, G.A. Rossetti Jr. and L.E. Cross for many beneficial discussions. This research was supported by the ONR under (Grant No. NOOO14-92-J-1501 and NSF under Grant No. DMR-92-23847.",

year = "1995",

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T1 - Defect stabilized periodic amplitude modulations in ferroelectrics

AU - Cao, Wenwu

N1 - Funding Information: The author is indebted to Drs. G.R. Barsch, J.A. Krumhansl, C.A. Randall, G.A. Rossetti Jr. and L.E. Cross for many beneficial discussions. This research was supported by the ONR under (Grant No. NOOO14-92-J-1501 and NSF under Grant No. DMR-92-23847.

PY - 1995/12/1

Y1 - 1995/12/1

N2 - Theoretical analysis shows that the total free energy of a ferroelectric system with free boundary conditions increases with the number of the inhomogeneous regions, such as domain walls and other modulated structures. However, charged defects could lower the total energy of a ferroelectric system by interacting with charge density fluctuations in inhomogeneous regions. We discuss a special kind of inhomogeneous microstructure in a lanthanum doped lead titanate, the amplitude modulations, which can be stabilized by aliovalent dopants.

AB - Theoretical analysis shows that the total free energy of a ferroelectric system with free boundary conditions increases with the number of the inhomogeneous regions, such as domain walls and other modulated structures. However, charged defects could lower the total energy of a ferroelectric system by interacting with charge density fluctuations in inhomogeneous regions. We discuss a special kind of inhomogeneous microstructure in a lanthanum doped lead titanate, the amplitude modulations, which can be stabilized by aliovalent dopants.

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JO - Phase Transitions

JF - Phase Transitions

IS - 1-4

ER -

Defect stabilized periodic amplitude modulations in ferroelectrics

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