Effect of Mn-doping on optical properties of lead-free (K0.4Na0.6)NbO3 ferroelectric single crystals

Hu, Yue; Xie, Qingxiu; Wu, Yang; Zhao, Xiangyong; Tang, Yanxue; Wang, Feifei; Duan, Zhihua; Lin, Di; Luo, Haosu; Liang, Ruihong

doi:10.1016/j.jeurceramsoc.2020.03.017

Cited by 12 publications

(11 citation statements)

References 29 publications

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“…Enhanced electromechanical transducer efficiency has been achieved in lead zirconate titanate (PZT)‐based ceramics by Mn doping 21 . For bulk ferroelectrics, the addition of oxides has been verified to be the most simple and flexible approach to engineer defects 22–27 . Therefore, different kinds of oxides (CuO, MnO 2 , and CeO 2 ) have been selected here to manipulate the domain configuration and relaxor state in BF‐BT‐based ceramics.…”

Section: Introductionmentioning

confidence: 99%

Multiple property enhancement in bismuth ferrite‐based ferroelectrics by balancing nanodomain and relaxor state

Zheng

2021

J Am Ceram Soc.

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Bismuth ferrite‐barium titanate (BF‐BT)‐based ferroelectrics have received widespread attention due to its adjustable structure features and multifunctional characteristics. Property optimization (ferroelectricity, piezoelectricity, electrostrain, electrostriction) for different application scenarios can be realized by increasing BT content gradually, while it is still difficult to integrate multiple performance advantages in the same component. To solve the problem and achieve the simultaneous enhancement of property parameters, defect engineering was adopted in this work to balance domain configuration and relaxor state via selective oxides modification strategy. Compared with the nanodomain engineered relaxor ferroelectrics with improved electrostrain and degraded ferroelectricity, the defect‐mediated ceramics doped with MnO2 present both enhanced electrostrain and ferroelectricity. Multiscale structure analysis (crystal structure, defect structure, and domain structure) and property characterization (ferroelectricity, strain property, and leakage current density) suggested that the defect dipoles induced by Mn substitution can effectively refine domain size and maintain ferroelectric state at room temperature, and the easier domain switching caused by weak‐correlated polar dipoles greatly improves both the strain and ferroelectricity. Especially, the defect dipoles‐mediated nanodomain and property enhancement can be only observed in BFO‐Mn ceramics, and infeasible for other oxides (e.g., CuO and CeO2). We believe that this work can provide some guidance to modify electrical properties in BF‐BT‐based ferroelectrics.

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Section: Introductionmentioning

confidence: 99%

Multiple property enhancement in bismuth ferrite‐based ferroelectrics by balancing nanodomain and relaxor state

Zheng

2021

J Am Ceram Soc.

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Section: Resultsmentioning

confidence: 99%

“…This shows the weaker dispersion in the 6PSN-61PMN-33PT crystal compared to that in the PMN-32PT crystal, which is conducive for improving the image quality. For ferroelectrics with a perovskite structure, lattice dynamical theories indicate that the optical properties are mainly determined by the coupling of the d orbits in the B-site cation and the 2p orbits in the O anions related to each BO6 octahedron [21], suggesting For ferroelectrics with a perovskite structure, lattice dynamical theories indicate that the optical properties are mainly determined by the coupling of the d orbits in the B-site cation and the 2p orbits in the O anions related to each BO 6 octahedron [21], suggesting that the BO 6 octahedron plays a dominant role in the refractive index behavior in perovskite structure ferroelectrics. Based on the results in Figure 2, we propose that the decrease of the refractive indices in the ternary 6PSN-61PMN-33PT crystals are related to the expansion of the BO 6 oxygen octahedron because the Sc 3+ (r ion = 0.0745 nm) ions enter into the B-site to replace the Mg 2+ (r ion = 0.072 nm) and Nb 5+ (r ion = 0.064 nm) ions [20,22].…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…Compared with the PMN-32PT, the 6PSN-61PMN-33PT crystal showed larger E0 and Ed values (see Table 1). Therefore, we suggest that the 6PSN-61PMN-33PT crystal had a larger band gap and structure order than the PMN-32PT crystal [20,21]. Figure 7 shows the change in optical absorption coefficient α of the 6PSN-61PMN-33PT and PMN-32PT crystals as a function of the wavelength.…”

Section: Resultsmentioning

confidence: 99%

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Optical Properties and Band Gap of Ternary PSN-PMN-PT Single Crystals

et al. 2021

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This study investigated the optical properties and the interband transition of a ternary [100]-oriented 6PSN-61PMN-33PT relaxor ferroelectric single crystal. Compared with the binary [100]-oriented PMN-32PT crystal, the [100]-oriented 6PSN-61PMN-33PT crystal exhibited excellent optical properties, including high transmittance, low refractive index, weak frequency dispersion, and low reflection and absorption coefficients. All these differences can be attributed to the structural changes of the 6PSN-61PMN-33PT crystal, such as its large lattice size and increased band gap. The crystal’s transmittance was significantly improved after alternating current electric field poling due to the increased domain size and the order domain structure. The largest transmittance for the 6PSN-61PMN-33PT crystal was up to 66%. Our experimental results indicate that the ternary 6PSN-61PMN-33PT ferroelectric single crystal has great application potential in the optical field.

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Effects of the calcined temperature of ingredients on the growth, structure and electrical properties of (K0.5Na0.5)NbO3-based single crystals

Yao

Jiang

et al. 2020

J Mater Sci: Mater Electron

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Effect of Mn-doping on optical properties of lead-free (K0.4Na0.6)NbO3 ferroelectric single crystals

Cited by 12 publications

References 29 publications

Multiple property enhancement in bismuth ferrite‐based ferroelectrics by balancing nanodomain and relaxor state

Multiple property enhancement in bismuth ferrite‐based ferroelectrics by balancing nanodomain and relaxor state

Optical Properties and Band Gap of Ternary PSN-PMN-PT Single Crystals

Effects of the calcined temperature of ingredients on the growth, structure and electrical properties of (K0.5Na0.5)NbO3-based single crystals

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