Nb polarization in ferroelectric perovskites KNbO3 and (PbZn1/3Nb2/3O3)0.88-(PbTiO3 )0.12

E. Mamontov; W. Dmowski; T. Egami

doi:10.1557/proc-718-d8.10

Nb polarization in ferroelectric perovskites KNbO₃ and (PbZn_1/3Nb_2/3O₃)_0.88-(PbTiO₃)_0.12

E. Mamontov, W. Dmowski, T. Egami

Research output: Contribution to journal › Conference article › peer-review

Abstract

XANES measurements have demonstrated that Nb polarization in PbZn_1/3Nb_2/3O_30.88-(PbTiO₃)_0.12 is small compared to that in KNbO₃. This finding disproves the view of Nb⁵⁺ as invariably ferroelectrically active cation, and demonstrates that its polarizability depends on the A-site cations. Our results do not support conventional view of retaxor behavior in Pb(B′_1/3Nb_2/3)O₃ ferroelectrics as a consequence of disruption of the connectivity of polarizable Nb⁵⁺ ions by their non-polarizable B′ counterparts. Instead, they speak in favor of scenario in which relaxor behavior is caused by randomness of the local direction of Pb polarization due to chemical disorder on the B-sites of the perovskite structure.

Original language	English
Pages (from-to)	263-268
Number of pages	6
Journal	Materials Research Society Symposium - Proceedings
Volume	718
DOIs	https://doi.org/10.1557/proc-718-d8.10
State	Published - 2002
Externally published	Yes
Event	Perovskite Materials - San Francisco, CA, United States Duration: Apr 1 2002 → Apr 5 2002

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title = "Nb polarization in ferroelectric perovskites KNbO3 and (PbZn1/3Nb2/3O3)0.88-(PbTiO3 )0.12",

abstract = "XANES measurements have demonstrated that Nb polarization in PbZn1/3Nb2/3O30.88-(PbTiO3 )0.12 is small compared to that in KNbO3. This finding disproves the view of Nb5+ as invariably ferroelectrically active cation, and demonstrates that its polarizability depends on the A-site cations. Our results do not support conventional view of retaxor behavior in Pb(B′1/3Nb2/3)O3 ferroelectrics as a consequence of disruption of the connectivity of polarizable Nb5+ ions by their non-polarizable B′ counterparts. Instead, they speak in favor of scenario in which relaxor behavior is caused by randomness of the local direction of Pb polarization due to chemical disorder on the B-sites of the perovskite structure.",

author = "E. Mamontov and W. Dmowski and T. Egami",

year = "2002",

doi = "10.1557/proc-718-d8.10",

language = "English",

volume = "718",

pages = "263--268",

journal = "Materials Research Society Symposium - Proceedings",

issn = "0272-9172",

note = "Perovskite Materials ; Conference date: 01-04-2002 Through 05-04-2002",

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TY - JOUR

T1 - Nb polarization in ferroelectric perovskites KNbO3 and (PbZn1/3Nb2/3O3)0.88-(PbTiO3 )0.12

AU - Mamontov, E.

AU - Dmowski, W.

AU - Egami, T.

PY - 2002

Y1 - 2002

N2 - XANES measurements have demonstrated that Nb polarization in PbZn1/3Nb2/3O30.88-(PbTiO3 )0.12 is small compared to that in KNbO3. This finding disproves the view of Nb5+ as invariably ferroelectrically active cation, and demonstrates that its polarizability depends on the A-site cations. Our results do not support conventional view of retaxor behavior in Pb(B′1/3Nb2/3)O3 ferroelectrics as a consequence of disruption of the connectivity of polarizable Nb5+ ions by their non-polarizable B′ counterparts. Instead, they speak in favor of scenario in which relaxor behavior is caused by randomness of the local direction of Pb polarization due to chemical disorder on the B-sites of the perovskite structure.

AB - XANES measurements have demonstrated that Nb polarization in PbZn1/3Nb2/3O30.88-(PbTiO3 )0.12 is small compared to that in KNbO3. This finding disproves the view of Nb5+ as invariably ferroelectrically active cation, and demonstrates that its polarizability depends on the A-site cations. Our results do not support conventional view of retaxor behavior in Pb(B′1/3Nb2/3)O3 ferroelectrics as a consequence of disruption of the connectivity of polarizable Nb5+ ions by their non-polarizable B′ counterparts. Instead, they speak in favor of scenario in which relaxor behavior is caused by randomness of the local direction of Pb polarization due to chemical disorder on the B-sites of the perovskite structure.

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U2 - 10.1557/proc-718-d8.10

DO - 10.1557/proc-718-d8.10

M3 - Conference article

AN - SCOPUS:0036451512

SN - 0272-9172

VL - 718

SP - 263

EP - 268

JO - Materials Research Society Symposium - Proceedings

JF - Materials Research Society Symposium - Proceedings

T2 - Perovskite Materials

Y2 - 1 April 2002 through 5 April 2002

ER -

Nb polarization in ferroelectric perovskites KNbO₃ and (PbZn_1/3Nb_2/3O₃)_0.88-(PbTiO₃)_0.12

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