Two-step phase changes in cubic relaxor ferroelectrics

Colla, Eugene V.; Weissman, M. B.

doi:10.1103/physrevb.72.104106

Cited by 33 publications

(20 citation statements)

References 27 publications

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“…This observation is in good agreement with the results obtained for polycrystalline BNT‐100 x BT samples doped with manganese, where a single‐peak depolarization current curve was observed for low BT‐content, but multiple peaks appeared as the composition entered the MPB region. A similar process has been observed by Colla and Weissmann in the temperature‐induced depolarization of rhombohedral 0.94(PbMg 1/3 Nb 2/3 O 3 )‐0.06PbTiO 3 (PMN‐6PT) . Their explanation is based on the relaxor character of the transition and the existence of different types of PNR.…”

Section: Discussionmentioning

confidence: 99%

“…4(c) and (f)]. This type of loop is again an indication for a multistep polarization reversal process, 44 but this time it does not involve the decay of long-range ordered ferroelectric domains into PNR. Two observations lead to this conclusion: first, polarization reversal via PNR was never observed more than 20°C below T F-R in previous studies.…”

Section: (1) Depolarization Behavior and Thermal Phase Stabilitymentioning

confidence: 91%

“…A similar process has been observed by Colla and Weissmann in the temperature-induced depolarization of rhombohedral 0.94(PbMg 1/3 Nb 2/3 O 3 )-0.06PbTiO 3 (PMN-6PT). 44 Their explanation is based on the relaxor character of the transition and the existence of different types of PNR. If these PNR have different dynamics, this would lead to the observation of distinct decay processes at separate temperatures.…”

Section: (1) Depolarization Behavior and Thermal Phase Stabilitymentioning

confidence: 99%

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Orientation‐Dependence of Thermal Depolarization and Phase Development in Bi_1/2Na_1/2TiO₃‐BaTiO₃ Single Crystals

et al. 2015

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The direction-dependence of pyroelectric properties of (1 -x) Bi 1/2 Na 1/2 TiO 3 -xBaTiO 3 (BNT -100xBT) is investigated, using single crystal samples with well-defined orientations for x = 0.036 and x = 0.063. The results are compared with those of temperature-dependent measurements of the ferroelectric and dielectric hysteresis. The depolarization temperature T d of each crystal composition is found to depend on crystal orientation, a fact that is explained by differences in the stability of respective domain configurations. A rationalization is offered for the observation that T d differs from the ferroelectric-relaxor transition temperature, depending on orientation. The hysteresis curves of BNT -3.6BT are typical for a rhombohedral system with a ferroelectric-relaxor transition, with polarization reversal close to T d occurring in a multistep process that includes decay of ferroelectric domains into polar nanoregions and re-formation of domains. BNT -6.3BT, a composition in the region of the morphotropic phase boundary, shows the same feature, but additionally is characterized by a field-induced transition between rhombohedral and tetragonal symmetry. This combination results in an effective piezoelectric coefficient of d

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Section: Discussionmentioning

confidence: 99%

Section: (1) Depolarization Behavior and Thermal Phase Stabilitymentioning

confidence: 91%

Section: (1) Depolarization Behavior and Thermal Phase Stabilitymentioning

confidence: 99%

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Orientation‐Dependence of Thermal Depolarization and Phase Development in Bi_1/2Na_1/2TiO₃‐BaTiO₃ Single Crystals

et al. 2015

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“…16,17 The most fascinating aspect of PMN lies in its nonergodic states under bias electric fields. [18][19][20][21][22][23][24][25][26][27][28][29] The polar nanoregions in PMN can grow into micrometer-sized ferroelectric domains when driven by external electric fields, which corresponds to a field-induced phase transition. 20,30,31 The transition kinetics study has shown that when a static field is applied to a zerofield-cooled crystal along the ͗111͘ direction, the phase transition takes place abruptly after an incubation period.…”

Section: Introductionmentioning

confidence: 99%

Electric field-induced phase transitions in (111)-, (110)-, and (100)-orientedPb(Mg1∕3Nb2∕3)O3
Zhao
¹
,
Qu
²
,
Tan
³

et al. 2007
Phys. Rev. B
110
8
68
0
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Electric field-induced phase transitions were investigated in (111), (110), and (100) thin platelets of relaxor ferroelectric Pb(Mg 1∕3 Nb 2∕3 )O 3 single crystals with electric fields applied along the ⟨111⟩, ⟨110⟩, and ⟨100⟩ directions, respectively. Temperature dependences of complex dielectric permittivity, pyroelectric current and dielectric hysteresis loops were investigated. Electric field-temperature (E-T) phase diagrams were proposed for the different directions of the field. Alongside with the high-temperature ergodic relaxor phase and the low-temperature glassy nonergodic relaxor phase existing at E=0, the ferroelectric phase may appear in the diagram at the fields higher than the threshold field (E th ). The temperature of the first-order transition between ergodic relaxor and ferroelectric phases (T C ) was located in field cooling and field heating after fieldcooling regimes. For the ⟨111⟩ field direction, T C is higher and E th is lower than for the other directions. For the ⟨100⟩ direction, T C is the lowest and E th is the highest. The critical point bounding the T C (E) line when the field is applied in ⟨111⟩ direction [ Z. Kutnjak, J. Petzelt and R. Blinc Nature 441 956 (2006)] is not observed in the ⟨110⟩ and ⟨100⟩ directions up to the highest applied field of 7.5 kV∕cm. Extrapolation of experimental data suggests that the critical point for the ⟨110⟩ and ⟨100⟩ directions (if any) can be expected only at much higher fields. In the hysteresis loops experiments performed after zero-field cooling, the lower temperature limit is determined above which a ferroelectric phase can be induced from the frozen glassy state at a given field strength or the polarization of the induced ferroelectric phase can be reversed. This limit is located at much lower temperatures in the (100) platelet than in the (110) or (111) platelets. An additional ferroelectric rhombohedral to ferroelectric orthorhombic phase transition occurs in the (110) platelet at high electric fields (∼20 kV∕cm). The mechanisms of the field-induced transformation from the glassy nonergodic relaxor phase or the ergodic relaxor phase to the ferroelectric phase are discussed.Electric field-induced phase transitions were investigated in ͑111͒, ͑110͒, and ͑100͒ thin platelets of relaxor ferroelectric Pb͑Mg 1/3 Nb 2/3 ͒O 3 single crystals with electric fields applied along the ͗111͘, ͗110͘, and ͗100͘ directions, respectively. Temperature dependences of complex dielectric permittivity, pyroelectric current and dielectric hysteresis loops were investigated. Electric field-temperature ͑E-T͒ phase diagrams were proposed for the different directions of the field. Alongside with the high-temperature ergodic relaxor phase and the low-temperature glassy nonergodic relaxor phase existing at E = 0, the ferroelectric phase may appear in the diagram at the fields higher than the threshold field ͑E th ͒. The temperature of the first-order transition between ergodic relaxor and ferroelectric phases ͑T C ͒ was located in field cooling and field heating after fi...

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“…% Mn doped BN6BT 25 and high-strain relaxor (PbMg 1/3 Nb 2/3 O 3 ) 0.94 (PbTiO 3 ) 0.06 (Ref. 38) were attributed to different types of PNRs. The coexistence of tetragonal and rhombohedral PNRs, which respond differently to external field, is likely responsible for the irregular depolarization behavior.…”

Section: Resultsmentioning

confidence: 99%

Structural stability and depolarization of manganese-doped (Bi0.5Na0.5)1−xBaxTiO3 relaxor ferroelectrics

Wang

Chang

et al. 2014

Journal of Applied Physics

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This work reveals that 0.5 mol. % manganese (Mn) doping in (Bi0.5Na0.5)1−xBaxTiO3 (x = 0 and 0.075) solid solutions can increase structural thermal stability, depolarization temperature (Td), piezoelectric coefficient (d33), and electromechanical coupling factor (kt). High-resolution X-ray diffraction and transmission electron microscopy reveal coexistence of rhombohedral (R) R3c and tetragonal (T) P4bm phases in (Bi0.5Na0.5)0.925Ba0.075TiO3 (BN7.5BT) and 0.5 mol. % Mn-doped BN7.5BT (BN7.5BT-0.5Mn). (Bi0.5Na0.5)TiO3 (BNT) and BN7.5BT show an R − R + T phase transition, which does not occur in 0.5 mol. % Mn-doped BNT (BNT-0.5Mn) and BN7.5BT-0.5Mn. Dielectric permittivity (ε′) follows the Curie-Weiss equation, ε′ = C/(T − To), above the Burns temperature (TB), below which polar nanoregions begin to develop. The direct piezoelectric coefficient (d33) and electromechanical coupling factor (kt) of BN7.5BT-0.5Mn reach 190 pC/N and 47%.

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Two-step phase changes in cubic relaxor ferroelectrics

Cited by 33 publications

References 27 publications

Orientation‐Dependence of Thermal Depolarization and Phase Development in Bi_1/2Na_1/2TiO₃‐BaTiO₃ Single Crystals

Orientation‐Dependence of Thermal Depolarization and Phase Development in Bi_1/2Na_1/2TiO₃‐BaTiO₃ Single Crystals

Electric field-induced phase transitions in (111)-, (110)-, and (100)-orientedPb(Mg1∕3Nb2∕3)O3
Zhao
¹
,
Qu
²
,
Tan
³

et al. 2007
Phys. Rev. B
110
8
68
0
View full text Add to dashboard Cite

Structural stability and depolarization of manganese-doped (Bi0.5Na0.5)1−xBaxTiO3 relaxor ferroelectrics

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Two-step phase changes in cubic relaxor ferroelectrics

Cited by 33 publications

References 27 publications

Orientation‐Dependence of Thermal Depolarization and Phase Development in Bi1/2Na1/2TiO3‐BaTiO3 Single Crystals

Orientation‐Dependence of Thermal Depolarization and Phase Development in Bi1/2Na1/2TiO3‐BaTiO3 Single Crystals

Electric field-induced phase transitions in (111)-, (110)-, and (100)-orientedPb(Mg1∕3Nb2∕3)O3Zhao1, Qu2, Tan3 et al. 2007Phys. Rev. B1108680View full textAdd to dashboardCite

Structural stability and depolarization of manganese-doped (Bi0.5Na0.5)1−xBaxTiO3 relaxor ferroelectrics

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Product

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Orientation‐Dependence of Thermal Depolarization and Phase Development in Bi_1/2Na_1/2TiO₃‐BaTiO₃ Single Crystals

Orientation‐Dependence of Thermal Depolarization and Phase Development in Bi_1/2Na_1/2TiO₃‐BaTiO₃ Single Crystals

Electric field-induced phase transitions in (111)-, (110)-, and (100)-orientedPb(Mg1∕3Nb2∕3)O3
Zhao
¹
,
Qu
²
,
Tan
³

et al. 2007
Phys. Rev. B
110
8
68
0
View full text Add to dashboard Cite