Shift in Morphotropic Phase Boundary in La-Doped BiFeO<sub>3</sub>–PbTiO<sub>3</sub>Piezoceramics

Leist, Thorsten; Jo, Wook; Comyn, T.P.; Bell, Andrew J.; Rödel, Jürgen

doi:10.1143/jjap.48.120205

Cited by 32 publications

(41 citation statements)

References 20 publications

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“…An increase in the La content leads to a reduction of the c/a ratio of the tetragonal phase from 1.10 to 1.01, in agreement with previous reports. 26,27 As expected, an increase in temperature leads to a decrease in the tetragonal distortion. Measurement fits are provided to visualize the changes in the c/a ratios for each temperature.…”

Section: Resultssupporting

confidence: 73%

“…However, it has been shown that even significant deviations from this ratio have little influence on material properties. 27 Details of the powder preparation and sintering procedures can be found in detail elsewhere. 27,29,34 As an effect of the lanthanum doping it was possible to tune the tetragonality from 1.10 to 1.01, 27 which was accompanied by a reduced Curie temperature.…”

Section: Methodsmentioning

confidence: 99%

“…27 Details of the powder preparation and sintering procedures can be found in detail elsewhere. 27,29,34 As an effect of the lanthanum doping it was possible to tune the tetragonality from 1.10 to 1.01, 27 which was accompanied by a reduced Curie temperature. 26 The Curie temperature was found to decrease from 632 C in the undoped material to 189 C in the material doped with 30 mol.…”

Section: Methodsmentioning

confidence: 99%

“…26,27 A case study on this material showed a near-complete suppression of switching processes due to electrical loading for low La content. 28,29 This effect was attributed to the high internal stresses that are directly related to a large c/a ratio.…”

Section: Introductionmentioning

confidence: 95%

“…The BF/PT ratio was adjusted to obtain a structure in the region of the morphotropic phase boundary (MPB) for each given La content. 27 From the stress-strain curves the energy dissipated at different maximum loads was assessed 20 and compared to the energy dissipation during electrical a)…”

Section: Introductionmentioning

confidence: 99%

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Domain switching energies: Mechanical versus electrical loading in La-doped bismuth ferrite–lead titanate

Leist

Webber

et al. 2011

Journal of Applied Physics

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Articles you may be interested inEffect of tetragonal distortion on ferroelectric domain switching: A case study on La-doped BiFeO 3 -PbTiO 3 ceramics J. Appl. Phys. 108, 014103 (2010) The mechanical stress-induced domain switching and energy dissipation in morphotropic phase boundary (1Àx)(Bi 1 À y La y )FeO 3 -xPbTiO 3 during uniaxial compressive loading have been investigated at three different temperatures. The strain obtained was found to decrease with increasing lanthanum content, although a sharp increase in strain was observed for compositions doped with 7.5 and 10 at. % La. Increased domain switching was found in compositions with decreased tetragonality. This is discussed in terms of the competing influences of the amount of domain switching and the spontaneous strain on the macroscopic behavior under external fields. Comparison of the mechanically and electrically dissipated energy showed significant differences, discussed in terms of the different microscopic interactions of electric field and stress.

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Section: Resultssupporting

confidence: 73%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Domain switching energies: Mechanical versus electrical loading in La-doped bismuth ferrite–lead titanate

Leist

Webber

et al. 2011

Journal of Applied Physics

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Achieving Large Switchable Polarization and Enhanced Piezoelectric Response in BiFeO₃‐PbTiO₃ Solid Solution Ceramics

Zhuang

Tang

Lü

et al. 2021

Adv Elect Materials

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As important multifunctional oxides, BiFeO 3 -PbTiO 3 (BFPT) based perovskite materials have drawn increasing research interests due to their promising roomtemperature magnetoelectric (ME), [1] piezoelectric/ferroelectric, [2,3] photovoltaic, [4] and tuneable thermal expansion performances. [5] The two end members, BiFeO 3 (BFO) and PbTiO 3 (PT), can form complete solid solution in the (1−x)BFO-xPT system, where a morphotropic phase boundary (MPB) with coexisting rhombohedral and tetragonal phases was found in the composition range around x = 0.3. [6] Due to the high Curie temperatures (T C ) in both end members, the T C for the MPB compositions in BFPT is as high as ≈ 630 °C. [7] Moreover, the MPB is of metastable nature in a relatively wide composition range, [8] where a phase transition can be induced by an applied electric field. [1] Such an MPB-related phase transition could result in a giant and stable piezoelectric response. [9] Indeed, enhanced electromechanical effects were obtained recently in the vicinity of MPB of BFPT and Mn-doped BFPT, [1,10] making the BFPT system particularly interesting for high-temperature piezoelectric/ferroelectric applications.In prototype piezoelectrics such as Pb(Zr x Ti 1−x )O 3 (PZT) and Pb(Mg 1/3 Nb 2/3 )O 3 -PbTiO 3 (PMN-PT), [11,12] monoclinic phases are found to exist and act as a bridge connecting two phases on both sides of the MPB. In contrast, the MPB compositions of BFPT system show coexistence of two distinct ferroelectric phases inherited from the two respective end members. In addition, it is found in modified BFPT materials [13] that the two different ferroelectric phases also reveal diverse magnetic orderings. In our previous work, the substitution of rare earth Dy for Bi in the BFPT system is proved to induce ferromagnetism in the rhombohedral compositions with magnetic hysteresis loops, while the antiferromagnetic state is retained in the tetragonal compositions [14] at room temperature. These characteristics also make the BFPT system promising materials for the so-called phase-change large ME effects, where large ME Perovskite materials based on BiFeO 3 -PbTiO 3 (BFPT) solid solutions are promising for various applications thanks to the extremely large spontaneous polarization (P s ) and existence of multiferroic morphotropic phase boundary. For applications in piezoelectric and memory devices, complete switching of P s is needed, which is hard to achieve practically. In this work, a simple modified mixed-oxide reaction method is developed allowing to prepare Dy-and Smmodified BFPT ceramics with significantly improved properties. The MPB compositions demonstrate well-saturated ferroelectric hysteresis loops with large switchable remanent polarization of 60 µC cm −2 and enhanced piezoelectric properties with a large-signal piezoelectric coefficient d 33 * = 214 pm V −1 and a direct piezoelectric coefficient d 33 = 128 pC N −1 , which is one and a half times larger than the best d 33 value reported for the BFPT ceramics so far. The Curie temperature reaches...

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High thermally stable BiFeO3–PbTiO3–BaTiO3 ceramics with improved ferroelectric properties

Ning

Lin

Hou

et al. 2014

J Mater Sci: Mater Electron

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Shift in Morphotropic Phase Boundary in La-Doped BiFeO₃–PbTiO₃Piezoceramics

Cited by 32 publications

References 20 publications

Domain switching energies: Mechanical versus electrical loading in La-doped bismuth ferrite–lead titanate

Domain switching energies: Mechanical versus electrical loading in La-doped bismuth ferrite–lead titanate

Achieving Large Switchable Polarization and Enhanced Piezoelectric Response in BiFeO₃‐PbTiO₃ Solid Solution Ceramics

High thermally stable BiFeO3–PbTiO3–BaTiO3 ceramics with improved ferroelectric properties

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Shift in Morphotropic Phase Boundary in La-Doped BiFeO3–PbTiO3Piezoceramics

Cited by 32 publications

References 20 publications

Domain switching energies: Mechanical versus electrical loading in La-doped bismuth ferrite–lead titanate

Domain switching energies: Mechanical versus electrical loading in La-doped bismuth ferrite–lead titanate

Achieving Large Switchable Polarization and Enhanced Piezoelectric Response in BiFeO3‐PbTiO3 Solid Solution Ceramics

High thermally stable BiFeO3–PbTiO3–BaTiO3 ceramics with improved ferroelectric properties

Contact Info

Product

Resources

About

Shift in Morphotropic Phase Boundary in La-Doped BiFeO₃–PbTiO₃Piezoceramics

Achieving Large Switchable Polarization and Enhanced Piezoelectric Response in BiFeO₃‐PbTiO₃ Solid Solution Ceramics