Anomalous reduction in domain wall displacement at the morphotropic phase boundary of the piezoelectric alloy system PbTi O3-BiSc O3

Dipak Kumar Khatua; K. V. Lalitha; Chris M. Fancher; Jacob L. Jones; Rajeev Ranjan

doi:10.1103/PhysRevB.93.104103

Anomalous reduction in domain wall displacement at the morphotropic phase boundary of the piezoelectric alloy system PbTi O3-BiSc O3

Dipak Kumar Khatua, K. V. Lalitha, Chris M. Fancher, Jacob L. Jones, Rajeev Ranjan

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Abstract

A comparative study of field-induced domain switching and lattice strain was carried out by in situ electric-field-dependent high-energy synchrotron x-ray diffraction on a morphotropic phase boundary (MPB) and a near-MPB rhombohedral/pseudomonoclinic composition of a high-performance piezoelectric alloy (1-x)PbTiO3-(x)BiScO3. It is demonstrated that the MPB composition showing large d33∼425pC/N exhibits significantly reduced propensity of field-induced domain switching as compared to the non-MPB rhombohedral composition (d33∼260pC/N). These experimental observations contradict the basic premise of the martensitic-theory-based explanation which emphasizes on enhanced domain wall motion as the primary factor for the anomalous piezoelectric response in MPB piezoelectrics. Our results favor field-induced structural transformation to be the primary mechanism contributing to the large piezoresponse of the critical MPB composition of this system.

Original language	English
Article number	104103
Journal	Physical Review B
Volume	93
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevB.93.104103
State	Published - Mar 2 2016
Externally published	Yes

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title = "Anomalous reduction in domain wall displacement at the morphotropic phase boundary of the piezoelectric alloy system PbTi O3-BiSc O3",

abstract = "A comparative study of field-induced domain switching and lattice strain was carried out by in situ electric-field-dependent high-energy synchrotron x-ray diffraction on a morphotropic phase boundary (MPB) and a near-MPB rhombohedral/pseudomonoclinic composition of a high-performance piezoelectric alloy (1-x)PbTiO3-(x)BiScO3. It is demonstrated that the MPB composition showing large d33∼425pC/N exhibits significantly reduced propensity of field-induced domain switching as compared to the non-MPB rhombohedral composition (d33∼260pC/N). These experimental observations contradict the basic premise of the martensitic-theory-based explanation which emphasizes on enhanced domain wall motion as the primary factor for the anomalous piezoelectric response in MPB piezoelectrics. Our results favor field-induced structural transformation to be the primary mechanism contributing to the large piezoresponse of the critical MPB composition of this system.",

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AU - Khatua, Dipak Kumar

AU - Lalitha, K. V.

AU - Fancher, Chris M.

AU - Jones, Jacob L.

AU - Ranjan, Rajeev

PY - 2016/3/2

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AB - A comparative study of field-induced domain switching and lattice strain was carried out by in situ electric-field-dependent high-energy synchrotron x-ray diffraction on a morphotropic phase boundary (MPB) and a near-MPB rhombohedral/pseudomonoclinic composition of a high-performance piezoelectric alloy (1-x)PbTiO3-(x)BiScO3. It is demonstrated that the MPB composition showing large d33∼425pC/N exhibits significantly reduced propensity of field-induced domain switching as compared to the non-MPB rhombohedral composition (d33∼260pC/N). These experimental observations contradict the basic premise of the martensitic-theory-based explanation which emphasizes on enhanced domain wall motion as the primary factor for the anomalous piezoelectric response in MPB piezoelectrics. Our results favor field-induced structural transformation to be the primary mechanism contributing to the large piezoresponse of the critical MPB composition of this system.

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Anomalous reduction in domain wall displacement at the morphotropic phase boundary of the piezoelectric alloy system PbTi O3-BiSc O3

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