The structure change of PMN in the diffuse phase transition region

Shebanov, L. A.; Kapostinš, P.; Zvirgzds, Jānis

doi:10.1080/00150198408012718

Cited by 38 publications

(13 citation statements)

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“…25 So, the B-site ions, exhibiting he well-known existence of 1 : 1 ordered cluster, shift from the center position to the offcenter position of the octahedral along ͗111͘ direction. 25 So, the B-site ions, exhibiting he well-known existence of 1 : 1 ordered cluster, shift from the center position to the offcenter position of the octahedral along ͗111͘ direction.…”

Section: Resultsmentioning

confidence: 99%

Photoluminescence in PbMg_1/3Nb_2/3O₃–PbIn_1/2Nb_1/2O₃ systems

et al. 1998

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Photoluminescence for PbMg1/3Nb2/3O3 (PMN)– PbIn1/2Nb1/2O3 (PIN) solid solutions in the temperature ranging from 35 to 295 K have been obtained for the first time. An abrupt photoluminescence enhancement of the system has been observed to occur at ∼210 K, which can be attributed to the growing and merging of dynamic polar microregions or to the phase transformation of the material at this temperature. The PIN content has been found to affect the photoluminescence of the PMN-PIN system significantly. The photoluminescence mechanism for PMN-PIN has been studied.

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Section: Resultsmentioning

confidence: 99%

Photoluminescence in PbMg_1/3Nb_2/3O₃–PbIn_1/2Nb_1/2O₃ systems

et al. 1998

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“…In other words, the ratio of spontaneous polarization components along ͗110͘ and ͗211͘ oriented rhombohedral states is ͱ3/2Ϸ0.87, which is quite consistent with the ratio of measured spontaneous polarizations ͑obtained at Such a crystalline anisotropy of dielectric properties indicates that PMN-32%PT crystal has stronger crystalline distortion than the pure PMN whose average symmetry is cubic near room temperature. 1,5 Temperature-dependent behaviors of remanent polarization ( P r ) and E c are plotted in Fig. 5.…”

Section: Methodsmentioning

confidence: 99%

“…Near 280 K the PMN crystal undergoes a diffuse phase transition characterized by a broad frequency-dependent dielectric maximum. PMN has cubic symmetry at room temperature with space group Pm3m, whereas a small rhombohedral distortion ͑pseudocubic͒ was observed below 200 K. 1,5 Transmission electron microscopy ͑TEM͒ investigation has revealed the presence of nanometric scale polar clusters in the relaxor state. 6 The normal FE crystal PbTiO 3 ͑PT͒ has tetragonal symmetry with space group P4mm at room temperature and has a normal FE phase transition taking place at T c ϭ760 K with long-range FE order occurring below T c .…”

Section: Introductionmentioning

confidence: 99%

Orientation dependence and electric-field effect in the relaxor-based ferroelectric crystal(PbMg1/3Nb2/3
Tu
¹
,
Tsai
²
,
Chen
³

et al. 2002
Phys. Rev. B
51
2
17
0
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Dielectric permittivities, polarization-electric-field hysteresis loops, and domain structures have been measured as a function of temperature in relaxor-based ferroelectric single crystals (PbMg 1/3 Nb 2/3 O 3 ) 0.68 (PbTiO 3 ) 0.32 ͑PMN-32%PT͒ for ͗110͘ cub and ͗211͘ cub orientations. Contrary to the pure PbMg 1/3 Nb 2/3 O 3 ͑PMN͒, PMN-32%PT exhibits apparent crystallographic orientation dependences of dielectric permittivities, polarizations, domain structures and phase transitions. With a prior field-cooled treatment, a field-induced state, perhaps of orthorhombic symmetry, is evidenced and coexists with the rhombohedral symmetry in the low-temperature region. This field-induced phase is manifested by an extra dielectric peak observed near 373 K for the ͗211͘ cub orientation. A relaxation mechanism which is responsible for the so-called diffuse phase transition crosses a wide temperature region of ϳ340-400 K and results from fluctuations between rhombohedral and tetragonal states. In order of increasing temperature ͑without a prior field-cooled treatment͒, PMN-32%PT undergoes successive phase transformations: rhombohedral phase→coexistence of rhombohedral and tetragonal phases→tetragonal phase→coexistence of tetragonal and cubic phases→cubic phase.

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“…PMN undergoes a diffuse phase transition around 280 K in the dielectric permittivity and has cubic symmetry at room temperature with space group Pm3m, whereas below 200 K a small rhombohedral distortion (or pseudo-cubic structure) was observed. [1][2] The normal ferroelectric PbTiO 3 has tetragonal symmetry with space group P4mm at room temperature and has a sharp FE phase transition taking place at Te=760 K. 3 The mixed solid solution (PbMgli3Nb230 3 )j.•(PbTiO 3 ). (PMN-xPT) naturally has a morphotropic phase boundary [tetragonal FE ordering<-> rhombohedral FE ordering], where huge dielectric and piezoelectric constants appear, as is similar to the case in the PbZrO 3 -PbTiO 3 (PZT) system.…”

Section: Introductionmentioning

confidence: 99%

Hypersonic and Dielectric Studies of Relaxor Ferroelectric Single Crystal

Schmiidt

Yeh

et al. 1999

MRS Proc.

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Both the longitudinal (LA) Brillouin back-scattering spectra and dielectric permittivity along the [001] direction have been measured as a function of temperature for a relaxor ferroelectric single crystal (PbMgl, 3 Nb230 3 )0. 6 s(PbTiO 3 )0. 32 (PMN-32%PT). A sharp ferroelectric phase transition (which is associated with a Landau-Khalatnikov-like phonon damping maximum) was observed near 445 K. As temperature increases, a diffuse phase transition was detected near 280 K. In addition, the nature of the thermal hysteresis for the dielectric permittivity confirms that these transitions (near 280 and 445 K for heating procedure) are diffuse first-order and first-order, It

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The structure change of PMN in the diffuse phase transition region

Cited by 38 publications

References 0 publications

Photoluminescence in PbMg_1/3Nb_2/3O₃–PbIn_1/2Nb_1/2O₃ systems

Photoluminescence in PbMg_1/3Nb_2/3O₃–PbIn_1/2Nb_1/2O₃ systems

Orientation dependence and electric-field effect in the relaxor-based ferroelectric crystal(PbMg1/3Nb2/3
Tu
¹
,
Tsai
²
,
Chen
³

et al. 2002
Phys. Rev. B
51
2
17
0
View full text Add to dashboard Cite

Hypersonic and Dielectric Studies of Relaxor Ferroelectric Single Crystal

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The structure change of PMN in the diffuse phase transition region

Cited by 38 publications

References 0 publications

Photoluminescence in PbMg1/3Nb2/3O3–PbIn1/2Nb1/2O3 systems

Photoluminescence in PbMg1/3Nb2/3O3–PbIn1/2Nb1/2O3 systems

Orientation dependence and electric-field effect in the relaxor-based ferroelectric crystal(PbMg1/3Nb2/3Tu1, Tsai2, Chen3 et al. 2002Phys. Rev. B512170View full textAdd to dashboardCite

Hypersonic and Dielectric Studies of Relaxor Ferroelectric Single Crystal

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Photoluminescence in PbMg_1/3Nb_2/3O₃–PbIn_1/2Nb_1/2O₃ systems

Photoluminescence in PbMg_1/3Nb_2/3O₃–PbIn_1/2Nb_1/2O₃ systems

Orientation dependence and electric-field effect in the relaxor-based ferroelectric crystal(PbMg1/3Nb2/3
Tu
¹
,
Tsai
²
,
Chen
³

et al. 2002
Phys. Rev. B
51
2
17
0
View full text Add to dashboard Cite