Long-Time Relaxation of the Dielectric Response in Lead Magnoniobate

Colla, Eugene V.; Koroleva, Ekaterina; Okuneva, N. M.; Vakhrushev, S. B.

doi:10.1103/physrevlett.74.1681

Cited by 283 publications

(141 citation statements)

References 22 publications

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“…11 E-T phase diagrams have been constructed in several studies for ͓111͔-oriented PbMg 1/3 Nb 2/3 O 3 ͑PMN͒ 4,12,13 and PMN-xPT crystals. 3 The main conclusion stemming from experiment 4 is that the phase transition between the relaxor and ferroelectric phases, in PMN, is first order and it happens at a bias field exceeding some critical field. Such a supposition is also supported by the character of the field dependence of permittivity in ͓111͔ PMN crystals.…”

Section: Introductionmentioning

confidence: 99%

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Bias-field effect on the temperature anomalies of dielectric permittivity inPbMg1∕3Nb2∕3

et al. 2005

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In contrast to ordinary ferroelectrics where the temperature T m of the permittivity maximum monotonically increases with bias field E in ͑1−x͒PbMg 1/3 Nb 2/3 O 3 -͑x͒PbTiO 3 ͑0 ഛ x ഛ 0.35͒ single crystals, T m was found to remain constant or to decrease with E up to a certain threshold field E t , above which T m starts increasing. The threshold field E t decreases with increasing x, tending toward zero at approximately x = 0.4. We explain this dependence in the framework of models which take into account quenched random fields and random bonds. For crystals with 0.06ഛ x ഛ 0.13, the E-T phase diagrams are constructed. In contrast to PMN, they exhibit an additional, nearly field-independent boundary, in the vicinity of the Vogel-Fulcher temperature. We believe this boundary to correspond to an additional phase transition and the appearing order parameter is likely to be nonpolar.

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Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4][5][6][7][8][9][10] Besides, they serve as model objects for studying relaxor properties. Relaxors represent a class of disordered crystals exhibiting a broad and frequency-dependent temperature maximum of the dielectric permittivity versus temperature instead of a sharp maximum inherent to normal ferroelectrics.…”

Section: Introductionmentioning

confidence: 99%

Bias-field effect on the temperature anomalies of dielectric permittivity inPbMg1∕3Nb2∕3

et al. 2005

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“…The mechanism of the relaxor ferroelectric behavior continues to be a fascinating puzzle. Experimental data from neutron scattering, 2 nuclear magnetic resonance (NMR) 3 and measurements of nonlinear dielectric susceptibility, 3,4 pointed to the existence of a nonergodic structural glassy state in relaxors below a certain temperature. It is usually believed 3,5,6 that reorientational polar species responsible for the glassy behavior are composed of the clusters of low-symmetry structure having a size of a few nanometers, which were observed in relaxors.…”

Section: Introductionmentioning

confidence: 99%

Development of ferroelectric order in relaxor(1−x)Pb(Mg1/3
Ye
¹
,
Bing
²
,
Gao
³

et al. 2003
Phys. Rev. B

165

106

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The microstructure and phase transition in relaxor ferroelectric Pb(Mg 1/3 Nb 2/3 )O 3 (PMN) and its solid solution with PbTiO 3 (PT), PMN-xPT, remain to be one of the most puzzling issues of solid state science. In the present work we have investigated the evolution of the phase symmetry in PMN-xPT ceramics as a function of temperature (20 K < T < 500 K) and composition (0 ≤ x ≤ 0.15) by means of high-resolution synchrotron x-ray diffraction. Structural analysis based on the experimental data reveals that the substitution of Ti 4+ for the complex B-site (Mg 1/3 Nb 2/3 ) 4+ ions results in the development of a clean rhombohedral phase at a PT-concentration as low as 5%. The results provide some new insight into the development of the ferroelectric order in PMN-PT, which has been discussed in light of the kinetics of polar nanoregions and the physical models of the relaxor ferroelectrics to illustrate the structural evolution from a relaxor to a ferroelectric state.

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“…2,7,8 The polar nanoregions in Pb͑Mg 1/3 Nb 2/3 ͒O 3 can grow into micrometer-sized ferroelectric domains when driven by external electric fields, which correspond to a field-induced first order phase transition. [9][10][11][12][13][14] Measurements of the fieldinduced polarization and the x-ray diffraction peak shifts under bias at low temperatures suggested that the phase transition takes place abruptly after an incubation period. [11][12][13] It is inferred that the polar nanoregions get coarsened during the incubation period.…”

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In situ transmission electron microscopy study of the nanodomain growth in a Sc-doped lead magnesium niobate ceramic

Zhao

Tan

2006

Applied Physics Letters

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In situ transmission electron microscopy study of the nanodomain growth in a Sc-doped lead magnesium niobate ceramic AbstractSc doping enhances the B-site 1:1 cation ordering in the Pb(Mg1/3Nb2/3)O3ceramic. At low doping levels, the electrical polar domains remain at the nanometer scale and the relaxor ferroelectric behavior persists. The electric field-induced relaxor to normal ferroelectric phase transition process was directly observed with an in situtransmission electron microscopy technique in a Sc-doped Pb(Mg1/3Nb2/3)O3 polycrystalline sample. It was found that the phase transition started at the grain boundary and took two steps to complete: the gradual coalescence of the polar nanodomains and the abrupt formation of the large wedge-shaped ferroelectric domains.

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Long-Time Relaxation of the Dielectric Response in Lead Magnoniobate

Cited by 283 publications

References 22 publications

Bias-field effect on the temperature anomalies of dielectric permittivity inPbMg1∕3Nb2∕3

Bias-field effect on the temperature anomalies of dielectric permittivity inPbMg1∕3Nb2∕3

Development of ferroelectric order in relaxor(1−x)Pb(Mg1/3
Ye
¹
,
Bing
²
,
Gao
³

et al. 2003
Phys. Rev. B

In situ transmission electron microscopy study of the nanodomain growth in a Sc-doped lead magnesium niobate ceramic

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Long-Time Relaxation of the Dielectric Response in Lead Magnoniobate

Cited by 283 publications

References 22 publications

Bias-field effect on the temperature anomalies of dielectric permittivity inPbMg1∕3Nb2∕3

Bias-field effect on the temperature anomalies of dielectric permittivity inPbMg1∕3Nb2∕3

Development of ferroelectric order in relaxor(1−x)Pb(Mg1/3Ye1, Bing2, Gao3 et al. 2003Phys. Rev. B

In situ transmission electron microscopy study of the nanodomain growth in a Sc-doped lead magnesium niobate ceramic

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Development of ferroelectric order in relaxor(1−x)Pb(Mg1/3
Ye
¹
,
Bing
²
,
Gao
³

et al. 2003
Phys. Rev. B