The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Xianran Xing - One of the best experts on this subject based on the ideXlab platform.
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unique piezoelectric properties of the Monoclinic phase in pb zr ti o 3 ceramics large lattice strain and negligible domain switching
Physical Review Letters, 2016Co-Authors: Jun Chen, Linxing Zhang, Xianran XingAbstract:: The origin of the excellent piezoelectric properties at the morphotropic phase boundary is generally attributed to the existence of a Monoclinic phase in various piezoelectric systems. However, there exist no experimental studies that reveal the role of the Monoclinic phase in the piezoelectric behavior in phase-pure ceramics. In this work, a single Monoclinic phase has been identified in Pb(Zr,Ti)O_{3} ceramics at room temperature by in situ high-energy synchrotron x-ray diffraction, and its response to electric field has been characterized for the first time. Unique piezoelectric properties of the Monoclinic phase in terms of large intrinsic lattice strain and negligible domain switching have been observed. The extensional strain constant d_{33} and the transverse strain constant d_{31} are calculated to be 520 and -200 pm/V, respectively. These large piezoelectric coefficients are mainly due to the large intrinsic lattice strain, with very little extrinsic contribution from domain switching. The unique properties of the Monoclinic phase provide new insights into the mechanisms responsible for the piezoelectric properties at the morphotropic phase boundary.
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unique piezoelectric properties of the Monoclinic phase in pb zr ti o 3 ceramics large lattice strain and negligible domain switching
Physical Review Letters, 2016Co-Authors: Longlong Fan, Jun Chen, Linxing Zhang, Yang Ren, Zhao Pan, Xianran XingAbstract:The origin of the excellent piezoelectric properties at the morphotropic phase boundary is generally attributed to the existence of a Monoclinic phase in various piezoelectric systems. However, there exist no experimental studies that reveal the role of the Monoclinic phase in the piezoelectric behavior in phase-pure ceramics. In this work, a single Monoclinic phase has been identified in $\mathrm{Pb}(\mathrm{Zr},\mathrm{Ti}){\mathrm{O}}_{3}$ ceramics at room temperature by in situ high-energy synchrotron x-ray diffraction, and its response to electric field has been characterized for the first time. Unique piezoelectric properties of the Monoclinic phase in terms of large intrinsic lattice strain and negligible domain switching have been observed. The extensional strain constant ${d}_{33}$ and the transverse strain constant ${d}_{31}$ are calculated to be 520 and $\ensuremath{-}200\text{ }\text{ }\mathrm{pm}/\mathrm{V}$, respectively. These large piezoelectric coefficients are mainly due to the large intrinsic lattice strain, with very little extrinsic contribution from domain switching. The unique properties of the Monoclinic phase provide new insights into the mechanisms responsible for the piezoelectric properties at the morphotropic phase boundary.
O Zaharko - One of the best experts on this subject based on the ideXlab platform.
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powder neutron diffraction study of phase transitions in and a phase diagram of 1 x pb mg1 3nb2 3 o3 xpbtio3
Physical Review B, 2006Co-Authors: Akhilesh Kumar Singh, Dhananjai Pandey, O ZaharkoAbstract:Dielectric, piezoelectric resonance frequency, and powder neutron diffraction studies as a function of temperature have been performed on several compositions of $(1\ensuremath{-}x)[\mathrm{Pb}({\mathrm{Mg}}_{1∕3}{\mathrm{Nb}}_{2∕3}){\mathrm{O}}_{3}]\text{\ensuremath{-}}x\mathrm{Pb}\mathrm{Ti}{\mathrm{O}}_{3}$ $(PM\mathrm{N}\text{\ensuremath{-}}x\mathrm{PT})$ ceramics in and outside the morphotropic phase boundary (MPB) region to investigate the phase transitions and phase stabilities in this mixed system. Anomalies in the temperature dependence of piezoelectric resonance frequency and dielectric constant are correlated with structural changes using Rietveld analysis of powder neutron diffraction data. The frequency dependent dielectric studies reveal relaxor ferroelectric behavior for $xl0.35$ and a normal ferroelectric behavior for $x\ensuremath{\geqslant}0.35$. The dielectric peak temperature and the Vogel-Fulcher freezing temperature are found to increase linearly with ``$x$'' while their difference, after decreasing linearly with $x$, vanishes at $x=0.35$ suggesting a crossover form relaxor ferroelectric to normal ferroelectric behavior at this composition. A phase diagram of the $\mathrm{PMN}\text{\ensuremath{-}}x\mathrm{PT}$ system showing the stability fields of ergodic relaxor, Monoclinic ${M}_{B}$, Monoclinic ${M}_{C}$, tetragonal and cubic phases is presented. Our results suggest the presence of a succession of three phase transitions, not reported earlier, corresponding to structural changes from the Monoclinic ${M}_{B}$ to the Monoclinic ${M}_{C}$ to the tetragonal to the cubic phases for $0.27\ensuremath{\leqslant}x\ensuremath{\leqslant}0.30$ on heating above room temperature. In addition, our studies confirm the earlier findings on transitions from the Monoclinic ${M}_{C}$ to the tetragonal to the cubic phases for $0.31\ensuremath{\leqslant}x\ensuremath{\leqslant}0.34$ on heating above room temperature and tetragonal to Monoclinic ${M}_{C}$ phase on cooling below room temperature for $x=0.36$. All these transitions are found to be accompanied with anomalies either in the temperature dependence of dielectric constant or the piezoelectric resonance frequency or both. Rietveld analyses of the powder neutron diffraction data at various temperatures on a pseudorhombohedral composition with $x=0.25$ suggest that the short range ${M}_{B}$ type Monoclinic order present at room temperature grows to long range Monoclinic order on lowering the temperature. The temperature variations of the unit cell parameters and atomic shifts are also presented to throw light on the nature of the various phase transitions in this mixed system.
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powder neutron diffraction study of phase transitions in and a phase diagram of 1 x pb mg1 3nb2 3 o3 xpbtio3
Physical Review B, 2006Co-Authors: Akhilesh Kumar Singh, Dhananjai Pandey, O ZaharkoAbstract:Dielectric, piezoelectric resonance frequency, and powder neutron diffraction studies as a function of temperature have been performed on several compositions of (1-x)[Pb(Mg{sub 1/3}Nb{sub 2/3})O{sub 3}]-xPbTiO{sub 3} (PMN-xPT) ceramics in and outside the morphotropic phase boundary (MPB) region to investigate the phase transitions and phase stabilities in this mixed system. Anomalies in the temperature dependence of piezoelectric resonance frequency and dielectric constant are correlated with structural changes using Rietveld analysis of powder neutron diffraction data. The frequency dependent dielectric studies reveal relaxor ferroelectric behavior for x =}0.35. The dielectric peak temperature and the Vogel-Fulcher freezing temperature are found to increase linearly with 'x' while their difference, after decreasing linearly with x, vanishes at x=0.35 suggesting a crossover form relaxor ferroelectric to normal ferroelectric behavior at this composition. A phase diagram of the PMN-xPT system showing the stability fields of ergodic relaxor, Monoclinic M{sub B}, Monoclinic M{sub C}, tetragonal and cubic phases is presented. Our results suggest the presence of a succession of three phase transitions, not reported earlier, corresponding to structural changes from the Monoclinic M{sub B} to the Monoclinic M{sub C} to the tetragonal to the cubic phases for 0.27{<=}x{<=}0.30 on heating above roommore » temperature. In addition, our studies confirm the earlier findings on transitions from the Monoclinic M{sub C} to the tetragonal to the cubic phases for 0.31{<=}x{<=}0.34 on heating above room temperature and tetragonal to Monoclinic M{sub C} phase on cooling below room temperature for x=0.36. All these transitions are found to be accompanied with anomalies either in the temperature dependence of dielectric constant or the piezoelectric resonance frequency or both. Rietveld analyses of the powder neutron diffraction data at various temperatures on a pseudorhombohedral composition with x=0.25 suggest that the short range M{sub B} type Monoclinic order present at room temperature grows to long range Monoclinic order on lowering the temperature. The temperature variations of the unit cell parameters and atomic shifts are also presented to throw light on the nature of the various phase transitions in this mixed system.« less
Dhananjai Pandey - One of the best experts on this subject based on the ideXlab platform.
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powder neutron diffraction study of phase transitions in and a phase diagram of 1 x pb mg1 3nb2 3 o3 xpbtio3
Physical Review B, 2006Co-Authors: Akhilesh Kumar Singh, Dhananjai Pandey, O ZaharkoAbstract:Dielectric, piezoelectric resonance frequency, and powder neutron diffraction studies as a function of temperature have been performed on several compositions of $(1\ensuremath{-}x)[\mathrm{Pb}({\mathrm{Mg}}_{1∕3}{\mathrm{Nb}}_{2∕3}){\mathrm{O}}_{3}]\text{\ensuremath{-}}x\mathrm{Pb}\mathrm{Ti}{\mathrm{O}}_{3}$ $(PM\mathrm{N}\text{\ensuremath{-}}x\mathrm{PT})$ ceramics in and outside the morphotropic phase boundary (MPB) region to investigate the phase transitions and phase stabilities in this mixed system. Anomalies in the temperature dependence of piezoelectric resonance frequency and dielectric constant are correlated with structural changes using Rietveld analysis of powder neutron diffraction data. The frequency dependent dielectric studies reveal relaxor ferroelectric behavior for $xl0.35$ and a normal ferroelectric behavior for $x\ensuremath{\geqslant}0.35$. The dielectric peak temperature and the Vogel-Fulcher freezing temperature are found to increase linearly with ``$x$'' while their difference, after decreasing linearly with $x$, vanishes at $x=0.35$ suggesting a crossover form relaxor ferroelectric to normal ferroelectric behavior at this composition. A phase diagram of the $\mathrm{PMN}\text{\ensuremath{-}}x\mathrm{PT}$ system showing the stability fields of ergodic relaxor, Monoclinic ${M}_{B}$, Monoclinic ${M}_{C}$, tetragonal and cubic phases is presented. Our results suggest the presence of a succession of three phase transitions, not reported earlier, corresponding to structural changes from the Monoclinic ${M}_{B}$ to the Monoclinic ${M}_{C}$ to the tetragonal to the cubic phases for $0.27\ensuremath{\leqslant}x\ensuremath{\leqslant}0.30$ on heating above room temperature. In addition, our studies confirm the earlier findings on transitions from the Monoclinic ${M}_{C}$ to the tetragonal to the cubic phases for $0.31\ensuremath{\leqslant}x\ensuremath{\leqslant}0.34$ on heating above room temperature and tetragonal to Monoclinic ${M}_{C}$ phase on cooling below room temperature for $x=0.36$. All these transitions are found to be accompanied with anomalies either in the temperature dependence of dielectric constant or the piezoelectric resonance frequency or both. Rietveld analyses of the powder neutron diffraction data at various temperatures on a pseudorhombohedral composition with $x=0.25$ suggest that the short range ${M}_{B}$ type Monoclinic order present at room temperature grows to long range Monoclinic order on lowering the temperature. The temperature variations of the unit cell parameters and atomic shifts are also presented to throw light on the nature of the various phase transitions in this mixed system.
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powder neutron diffraction study of phase transitions in and a phase diagram of 1 x pb mg1 3nb2 3 o3 xpbtio3
Physical Review B, 2006Co-Authors: Akhilesh Kumar Singh, Dhananjai Pandey, O ZaharkoAbstract:Dielectric, piezoelectric resonance frequency, and powder neutron diffraction studies as a function of temperature have been performed on several compositions of (1-x)[Pb(Mg{sub 1/3}Nb{sub 2/3})O{sub 3}]-xPbTiO{sub 3} (PMN-xPT) ceramics in and outside the morphotropic phase boundary (MPB) region to investigate the phase transitions and phase stabilities in this mixed system. Anomalies in the temperature dependence of piezoelectric resonance frequency and dielectric constant are correlated with structural changes using Rietveld analysis of powder neutron diffraction data. The frequency dependent dielectric studies reveal relaxor ferroelectric behavior for x =}0.35. The dielectric peak temperature and the Vogel-Fulcher freezing temperature are found to increase linearly with 'x' while their difference, after decreasing linearly with x, vanishes at x=0.35 suggesting a crossover form relaxor ferroelectric to normal ferroelectric behavior at this composition. A phase diagram of the PMN-xPT system showing the stability fields of ergodic relaxor, Monoclinic M{sub B}, Monoclinic M{sub C}, tetragonal and cubic phases is presented. Our results suggest the presence of a succession of three phase transitions, not reported earlier, corresponding to structural changes from the Monoclinic M{sub B} to the Monoclinic M{sub C} to the tetragonal to the cubic phases for 0.27{<=}x{<=}0.30 on heating above roommore » temperature. In addition, our studies confirm the earlier findings on transitions from the Monoclinic M{sub C} to the tetragonal to the cubic phases for 0.31{<=}x{<=}0.34 on heating above room temperature and tetragonal to Monoclinic M{sub C} phase on cooling below room temperature for x=0.36. All these transitions are found to be accompanied with anomalies either in the temperature dependence of dielectric constant or the piezoelectric resonance frequency or both. Rietveld analyses of the powder neutron diffraction data at various temperatures on a pseudorhombohedral composition with x=0.25 suggest that the short range M{sub B} type Monoclinic order present at room temperature grows to long range Monoclinic order on lowering the temperature. The temperature variations of the unit cell parameters and atomic shifts are also presented to throw light on the nature of the various phase transitions in this mixed system.« less
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room temperature structure of pb zrxti1 xo3 around the morphotropic phase boundary region a rietveld study
Journal of Applied Physics, 2002Co-Authors: Rajeev Ranjan, Shashank Mishra, Dhananjai PandeyAbstract:We have carried out a detailed Rietveld analysis of x-ray powder diffraction data of Pb(ZrxTi1−x)O3 (PZT) compositions across the morphotropic phase boundary (MPB) region (x=0.515, 0.520, 0.525, 0.530). It is shown that the structure of PZT is pure tetragonal for x⩽0.515 with space group P4mm. In the MPB region, 0.515
Akhilesh Kumar Singh - One of the best experts on this subject based on the ideXlab platform.
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powder neutron diffraction study of phase transitions in and a phase diagram of 1 x pb mg1 3nb2 3 o3 xpbtio3
Physical Review B, 2006Co-Authors: Akhilesh Kumar Singh, Dhananjai Pandey, O ZaharkoAbstract:Dielectric, piezoelectric resonance frequency, and powder neutron diffraction studies as a function of temperature have been performed on several compositions of $(1\ensuremath{-}x)[\mathrm{Pb}({\mathrm{Mg}}_{1∕3}{\mathrm{Nb}}_{2∕3}){\mathrm{O}}_{3}]\text{\ensuremath{-}}x\mathrm{Pb}\mathrm{Ti}{\mathrm{O}}_{3}$ $(PM\mathrm{N}\text{\ensuremath{-}}x\mathrm{PT})$ ceramics in and outside the morphotropic phase boundary (MPB) region to investigate the phase transitions and phase stabilities in this mixed system. Anomalies in the temperature dependence of piezoelectric resonance frequency and dielectric constant are correlated with structural changes using Rietveld analysis of powder neutron diffraction data. The frequency dependent dielectric studies reveal relaxor ferroelectric behavior for $xl0.35$ and a normal ferroelectric behavior for $x\ensuremath{\geqslant}0.35$. The dielectric peak temperature and the Vogel-Fulcher freezing temperature are found to increase linearly with ``$x$'' while their difference, after decreasing linearly with $x$, vanishes at $x=0.35$ suggesting a crossover form relaxor ferroelectric to normal ferroelectric behavior at this composition. A phase diagram of the $\mathrm{PMN}\text{\ensuremath{-}}x\mathrm{PT}$ system showing the stability fields of ergodic relaxor, Monoclinic ${M}_{B}$, Monoclinic ${M}_{C}$, tetragonal and cubic phases is presented. Our results suggest the presence of a succession of three phase transitions, not reported earlier, corresponding to structural changes from the Monoclinic ${M}_{B}$ to the Monoclinic ${M}_{C}$ to the tetragonal to the cubic phases for $0.27\ensuremath{\leqslant}x\ensuremath{\leqslant}0.30$ on heating above room temperature. In addition, our studies confirm the earlier findings on transitions from the Monoclinic ${M}_{C}$ to the tetragonal to the cubic phases for $0.31\ensuremath{\leqslant}x\ensuremath{\leqslant}0.34$ on heating above room temperature and tetragonal to Monoclinic ${M}_{C}$ phase on cooling below room temperature for $x=0.36$. All these transitions are found to be accompanied with anomalies either in the temperature dependence of dielectric constant or the piezoelectric resonance frequency or both. Rietveld analyses of the powder neutron diffraction data at various temperatures on a pseudorhombohedral composition with $x=0.25$ suggest that the short range ${M}_{B}$ type Monoclinic order present at room temperature grows to long range Monoclinic order on lowering the temperature. The temperature variations of the unit cell parameters and atomic shifts are also presented to throw light on the nature of the various phase transitions in this mixed system.
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powder neutron diffraction study of phase transitions in and a phase diagram of 1 x pb mg1 3nb2 3 o3 xpbtio3
Physical Review B, 2006Co-Authors: Akhilesh Kumar Singh, Dhananjai Pandey, O ZaharkoAbstract:Dielectric, piezoelectric resonance frequency, and powder neutron diffraction studies as a function of temperature have been performed on several compositions of (1-x)[Pb(Mg{sub 1/3}Nb{sub 2/3})O{sub 3}]-xPbTiO{sub 3} (PMN-xPT) ceramics in and outside the morphotropic phase boundary (MPB) region to investigate the phase transitions and phase stabilities in this mixed system. Anomalies in the temperature dependence of piezoelectric resonance frequency and dielectric constant are correlated with structural changes using Rietveld analysis of powder neutron diffraction data. The frequency dependent dielectric studies reveal relaxor ferroelectric behavior for x =}0.35. The dielectric peak temperature and the Vogel-Fulcher freezing temperature are found to increase linearly with 'x' while their difference, after decreasing linearly with x, vanishes at x=0.35 suggesting a crossover form relaxor ferroelectric to normal ferroelectric behavior at this composition. A phase diagram of the PMN-xPT system showing the stability fields of ergodic relaxor, Monoclinic M{sub B}, Monoclinic M{sub C}, tetragonal and cubic phases is presented. Our results suggest the presence of a succession of three phase transitions, not reported earlier, corresponding to structural changes from the Monoclinic M{sub B} to the Monoclinic M{sub C} to the tetragonal to the cubic phases for 0.27{<=}x{<=}0.30 on heating above roommore » temperature. In addition, our studies confirm the earlier findings on transitions from the Monoclinic M{sub C} to the tetragonal to the cubic phases for 0.31{<=}x{<=}0.34 on heating above room temperature and tetragonal to Monoclinic M{sub C} phase on cooling below room temperature for x=0.36. All these transitions are found to be accompanied with anomalies either in the temperature dependence of dielectric constant or the piezoelectric resonance frequency or both. Rietveld analyses of the powder neutron diffraction data at various temperatures on a pseudorhombohedral composition with x=0.25 suggest that the short range M{sub B} type Monoclinic order present at room temperature grows to long range Monoclinic order on lowering the temperature. The temperature variations of the unit cell parameters and atomic shifts are also presented to throw light on the nature of the various phase transitions in this mixed system.« less
Jun Chen - One of the best experts on this subject based on the ideXlab platform.
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unique piezoelectric properties of the Monoclinic phase in pb zr ti o 3 ceramics large lattice strain and negligible domain switching
Physical Review Letters, 2016Co-Authors: Jun Chen, Linxing Zhang, Xianran XingAbstract:: The origin of the excellent piezoelectric properties at the morphotropic phase boundary is generally attributed to the existence of a Monoclinic phase in various piezoelectric systems. However, there exist no experimental studies that reveal the role of the Monoclinic phase in the piezoelectric behavior in phase-pure ceramics. In this work, a single Monoclinic phase has been identified in Pb(Zr,Ti)O_{3} ceramics at room temperature by in situ high-energy synchrotron x-ray diffraction, and its response to electric field has been characterized for the first time. Unique piezoelectric properties of the Monoclinic phase in terms of large intrinsic lattice strain and negligible domain switching have been observed. The extensional strain constant d_{33} and the transverse strain constant d_{31} are calculated to be 520 and -200 pm/V, respectively. These large piezoelectric coefficients are mainly due to the large intrinsic lattice strain, with very little extrinsic contribution from domain switching. The unique properties of the Monoclinic phase provide new insights into the mechanisms responsible for the piezoelectric properties at the morphotropic phase boundary.
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unique piezoelectric properties of the Monoclinic phase in pb zr ti o 3 ceramics large lattice strain and negligible domain switching
Physical Review Letters, 2016Co-Authors: Longlong Fan, Jun Chen, Linxing Zhang, Yang Ren, Zhao Pan, Xianran XingAbstract:The origin of the excellent piezoelectric properties at the morphotropic phase boundary is generally attributed to the existence of a Monoclinic phase in various piezoelectric systems. However, there exist no experimental studies that reveal the role of the Monoclinic phase in the piezoelectric behavior in phase-pure ceramics. In this work, a single Monoclinic phase has been identified in $\mathrm{Pb}(\mathrm{Zr},\mathrm{Ti}){\mathrm{O}}_{3}$ ceramics at room temperature by in situ high-energy synchrotron x-ray diffraction, and its response to electric field has been characterized for the first time. Unique piezoelectric properties of the Monoclinic phase in terms of large intrinsic lattice strain and negligible domain switching have been observed. The extensional strain constant ${d}_{33}$ and the transverse strain constant ${d}_{31}$ are calculated to be 520 and $\ensuremath{-}200\text{ }\text{ }\mathrm{pm}/\mathrm{V}$, respectively. These large piezoelectric coefficients are mainly due to the large intrinsic lattice strain, with very little extrinsic contribution from domain switching. The unique properties of the Monoclinic phase provide new insights into the mechanisms responsible for the piezoelectric properties at the morphotropic phase boundary.
