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Strain Coupling and Dynamic Relaxation in a Molecular Perovskite-Like Multiferroic Metal–Organic Framework Scopus
期刊论文 | 2018 | Advanced Functional Materials
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© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Magnetic metal–organic frameworks (MOFs) with a perovskite structure AMX3 are emerging single-phased multiferroics with different sources of magnetic and electric ordering. However, the atomic mechanism underlying the multiple ferroic coupling is convincingly clarified. In this work, large single crystals of [(CH3)2NH2][Ni(HCOO)3] are synthesized and shown to exhibit a first-order ferroelectric phase transition at ≈178 K during heating and at ≈151 K during cooling, as confirmed by temperature-dependent differential scanning calorimetry, Raman scattering, and X-ray diffraction studies. Resonant ultrasound spectroscopy (RUS) is used to investigate the elastic and anelastic properties between 5 and 300 K. The RUS results show an abrupt disappearance of resonance peaks above the ferroelectric transition point of ≈178 K. This is probably due to the unfreezing of dimethylammonium cation motion which couples with local strain. Small changes in elastic properties associated with two known magnetic transition at ≈35 and ≈15 K, respectively, are indicative of weak magnetoelastic coupling. An apparent peak in acoustic loss accompanying the canted antiferromagnetic ordering (≈35 K) and spin reorientation transition (≈15 K) is attributed to dynamical magnetoelastic coupling on the RUS time scale of ≈10−6 s. In comparison with the same MOF structures containing Mn2+ and Co2+, the smaller Ni2+ ions effectively generate an internal chemical pressure and induce a compressed ion force on the anion frameworks. This study opens up a new landscape to explore possibilities for ferroic-order coupling in molecular MOFs.

Keyword :

ferroelastic ferroelectric magnetoelastic coupling metal–organic frameworks multiferroic perovskite strain

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GB/T 7714 Xin, Lipeng , Zhang, Zhiying , Carpenter, Michael A. et al. Strain Coupling and Dynamic Relaxation in a Molecular Perovskite-Like Multiferroic Metal–Organic Framework [J]. | Advanced Functional Materials , 2018 .
MLA Xin, Lipeng et al. "Strain Coupling and Dynamic Relaxation in a Molecular Perovskite-Like Multiferroic Metal–Organic Framework" . | Advanced Functional Materials (2018) .
APA Xin, Lipeng , Zhang, Zhiying , Carpenter, Michael A. , Zhang, Ming , Jin, Feng , Zhang, Qingming et al. Strain Coupling and Dynamic Relaxation in a Molecular Perovskite-Like Multiferroic Metal–Organic Framework . | Advanced Functional Materials , 2018 .
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Influence of epitaxial strain on elastocaloric effect in ferroelectric thin films EI SCIE Scopus
期刊论文 | 2015 , 106 (3) | APPLIED PHYSICS LETTERS | IF: 3.142
WoS CC Cited Count: 16
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We report the influence of epitaxial strain u(m) on the elastocaloric properties of BaTiO3 thin films. Using thermodynamic calculations, we show that there exists a critical compressive stress sigma(3c) at which the elastocaloric effect is maximized for any compressive misfit strain we investigate. Moreover, it is found that |sigma(3c)| decreases significantly with decreasing |u(m)|, which is accompanied by a reduction of the elastocaloric response. Interestingly, a several fold enhancement in the electrocaloric effect can be achieved for stress in proximity of sigma(3c). The elastocaloric effect predicted here may find potential cooling applications by combining the stress-mediated electrocaloric effect or designing hybrid elastocaloric/ electrocaloric devices in the future. (C) 2015 AIP Publishing LLC.

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GB/T 7714 Liu, Yang , Wei, Jie , Lou, Xiaojie et al. Influence of epitaxial strain on elastocaloric effect in ferroelectric thin films [J]. | APPLIED PHYSICS LETTERS , 2015 , 106 (3) .
MLA Liu, Yang et al. "Influence of epitaxial strain on elastocaloric effect in ferroelectric thin films" . | APPLIED PHYSICS LETTERS 106 . 3 (2015) .
APA Liu, Yang , Wei, Jie , Lou, Xiaojie , Bellaiche, L. , Scott, James F. , Dkhil, Brahim . Influence of epitaxial strain on elastocaloric effect in ferroelectric thin films . | APPLIED PHYSICS LETTERS , 2015 , 106 (3) .
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Effective driving voltage on polarization fatigue in (Pb,La)(Zr,Ti)O-3 antiferroelectric thin films EI SCIE Scopus
期刊论文 | 2015 , 41 (1) , 109-114 | CERAMICS INTERNATIONAL | IF: 2.758
WoS CC Cited Count: 5
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Polarization fatigue in (Pb0.97La0.02)(Zr0.95Ti0.05)O-3 (PLZT) antiferroelectric thin films deposited onto silicon wafers is studied by investigating the effect of the peak/average/root-mean-square cycling voltage through varying the waveform of the electrical excitation. Interestingly, it is found that the fatigue behavior of the film is determined by the root-mean-square voltage of the external driving excitation rather than by the peak or average voltages. Our results can be well explained in the framework of the local phase decomposition model and indicate that the root-mean-square voltage should be considered as the effective driving voltage determining the polarization fatigue in PLZT antiferroelectric films. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

Keyword :

PLZT Fatigue Sol-gel processes

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GB/T 7714 Geng, Wenping , Lou, Xiaojie , Xu, Jianghong et al. Effective driving voltage on polarization fatigue in (Pb,La)(Zr,Ti)O-3 antiferroelectric thin films [J]. | CERAMICS INTERNATIONAL , 2015 , 41 (1) : 109-114 .
MLA Geng, Wenping et al. "Effective driving voltage on polarization fatigue in (Pb,La)(Zr,Ti)O-3 antiferroelectric thin films" . | CERAMICS INTERNATIONAL 41 . 1 (2015) : 109-114 .
APA Geng, Wenping , Lou, Xiaojie , Xu, Jianghong , Zhang, Fuping , Liu, Yang , Dkhil, Brahim et al. Effective driving voltage on polarization fatigue in (Pb,La)(Zr,Ti)O-3 antiferroelectric thin films . | CERAMICS INTERNATIONAL , 2015 , 41 (1) , 109-114 .
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Insight into Metalized Interfaces in Nano Devices by Surface Analytical Techniques EI SCIE PubMed Scopus
期刊论文 | 2015 , 7 (49) , 27351-27356 | ACS APPLIED MATERIALS & INTERFACES | IF: 7.145
WoS CC Cited Count: 2 SCOPUS Cited Count: 2
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Abstract :

Connections between metals and heterogeneous solid state materials form buried interfaces. These ubiquitous structures play an essential role in determining the performances of many nano- and microdevices. However, the information about the chemistry, structure, and properties of these real interfaces is intrinsically difficult to extract by traditional techniques. Therefore, approaches to efficiently discovering metalized interfaces are in high demand. Here, we demonstrate the transformation of nanoscale metal/oxide interface problems into surface problems through a novel metal-hydrogenation detaching method. We applied this technique to study the thickness dependence in Pb(Zr,Ti)O-3 (PZT) ferroelectric thin films, a long-standing interface problem in a model metal/insulator device,(1-6) and this allowed comprehensive surface analytical techniques to be adapted. A nonstoichiometric interfacial layer of 4.1 nm thick with low mass density, low permittivity, and weak ferro electricity was quantified at the Pt/PZT interface and attributed to the preferential diffusions among the compositional elements. Targeted interface engineering by Pb rebalance led to a substantial recovery of ferroelectric properties. Our results therefore pave the way to a better understanding of metallized interface in ferroelectric and dielectric nanodevices. We hope that more useful information about metalized interfaces of other solid materials could, analogously, be accessed by surface analytical techniques.

Keyword :

Pb(Zr,Ti)O-3 ferroelectric thin films targeted interface engineering metal/oxide interface thickness dependence metal-hydrogenation detaching method

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GB/T 7714 Xiang, Qing-Yun , Zhang, Kai , Wang, Yu et al. Insight into Metalized Interfaces in Nano Devices by Surface Analytical Techniques [J]. | ACS APPLIED MATERIALS & INTERFACES , 2015 , 7 (49) : 27351-27356 .
MLA Xiang, Qing-Yun et al. "Insight into Metalized Interfaces in Nano Devices by Surface Analytical Techniques" . | ACS APPLIED MATERIALS & INTERFACES 7 . 49 (2015) : 27351-27356 .
APA Xiang, Qing-Yun , Zhang, Kai , Wang, Yu , Lou, Xiao-Jie , Yao, Wen-Qing , Bai, Yang et al. Insight into Metalized Interfaces in Nano Devices by Surface Analytical Techniques . | ACS APPLIED MATERIALS & INTERFACES , 2015 , 7 (49) , 27351-27356 .
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Prediction of giant elastocaloric strength and stress-mediated electrocaloric effect in BaTiO3 single crystals SCIE Scopus
期刊论文 | 2014 , 90 (10) | PHYSICAL REVIEW B | IF: 3.736
WoS CC Cited Count: 26
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An applied stress field sigma(3) can reversibly change the temperature of an elastocaloric material under adiabatic conditions, and the temperature change Delta T-sigma 3 is usually maximized near phase transitions. Using a thermodynamic approach, we demonstrate that an elastocaloric strength alpha = vertical bar Delta T-sigma 3 vertical bar/vertical bar sigma(3)vertical bar of 0.016 K/MPa can be achieved benefiting from the full first-order phase transition in BaTiO3 single crystals, which is comparable with typical elastocaloric materials reported in the literature. The elastocaloric temperature change is found to be giant (3.2 K) under a stress of 200 MPa with a temperature span of over 50 K, which can be significantly larger than its electrocaloric counterpart (similar to 1 K). Moreover, it is found that the elastocaloric strength can be remarkably enhanced (2.32 K/MPa) as long as the phase transition is triggered even by a modest stress near the sharp first-order phase transition, which is two orders of magnitude larger than those accomplished by full transition. Therefore, even a low stress (< 30 MPa) can induce a modest elastocaloric effect (1.3 K) comparable with the electrocaloric counterpart, which is accompanied by a reduction of the working temperature span. In addition, it is found that the electrocaloric peak under tensile stresses moves towards higher temperatures with its magnitude slightly enhanced. Hopefully, our study will stimulate further investigations on elastocaloric and stress-mediated electrocaloric effects in ferroelectrics.

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GB/T 7714 Liu, Yang , Wei, Jie , Janolin, Pierre-Eymeric et al. Prediction of giant elastocaloric strength and stress-mediated electrocaloric effect in BaTiO3 single crystals [J]. | PHYSICAL REVIEW B , 2014 , 90 (10) .
MLA Liu, Yang et al. "Prediction of giant elastocaloric strength and stress-mediated electrocaloric effect in BaTiO3 single crystals" . | PHYSICAL REVIEW B 90 . 10 (2014) .
APA Liu, Yang , Wei, Jie , Janolin, Pierre-Eymeric , Infante, Ingrid C. , Kreisel, Jens , Lou, Xiaojie et al. Prediction of giant elastocaloric strength and stress-mediated electrocaloric effect in BaTiO3 single crystals . | PHYSICAL REVIEW B , 2014 , 90 (10) .
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Phase transitions and the piezoelectricity around morphotropic phase boundary in Ba(Zr0.2Ti0.8)O-3-x(Ba0.7Ca0.3)TiO3 lead-free solid solution EI SCIE Scopus
期刊论文 | 2014 , 105 (16) | APPLIED PHYSICS LETTERS | IF: 3.302
WoS CC Cited Count: 55
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In this paper, two displacive phase transitions around the morphotropic phase boundary (MPB) in Ba(Zr0.2Ti0.8)O-3-x(Ba0.7Ca0.3)TiO3 (BZT-xBCT) ceramics were detected by inspecting two anomalies of the Raman Ti4+-O2- longitudinal optical mode (similar to 725 cm(-1)). Further, permittivity and X-ray diffraction results demonstrated these two phase transitions originate from tetragonal (T) to rhombohedral (R) through an intermediate orthorhombic (O) phase. Importantly, we found that the maximum piezoelectric response (d(33) = 545pC/N) was achieved at the boundary between the T and O phase, indicating that the giant piezoelectricity of BZT-xBCT may mainly stem from the T-O phase boundary due to easier polarization rotation and larger lattice softening. (C) 2014 AIP Publishing LLC.

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GB/T 7714 Zhang, Le , Zhang, Ming , Wang, Liang et al. Phase transitions and the piezoelectricity around morphotropic phase boundary in Ba(Zr0.2Ti0.8)O-3-x(Ba0.7Ca0.3)TiO3 lead-free solid solution [J]. | APPLIED PHYSICS LETTERS , 2014 , 105 (16) .
MLA Zhang, Le et al. "Phase transitions and the piezoelectricity around morphotropic phase boundary in Ba(Zr0.2Ti0.8)O-3-x(Ba0.7Ca0.3)TiO3 lead-free solid solution" . | APPLIED PHYSICS LETTERS 105 . 16 (2014) .
APA Zhang, Le , Zhang, Ming , Wang, Liang , Zhou, Chao , Zhang, Zhen , Yao, Yonggang et al. Phase transitions and the piezoelectricity around morphotropic phase boundary in Ba(Zr0.2Ti0.8)O-3-x(Ba0.7Ca0.3)TiO3 lead-free solid solution . | APPLIED PHYSICS LETTERS , 2014 , 105 (16) .
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Enhanced electrocaloric effect in lead-free BaTi1-xSnxO3 ceramics near room temperature SCIE
期刊论文 | 2014 , 105 (10) | APPLIED PHYSICS LETTERS | IF: 3.302
WoS CC Cited Count: 64
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The electrocaloric effect in lead-free BaTi1-xSnxO3 (BTSn, x = 0.08, 0.105, and 0.14) ferroelectric ceramics was studied by using an indirect method. It was found that the largest electrocaloric response could be achieved in BTSn with x = x(QP) = 0.105 near room temperature with an adiabatic temperature change Delta T of 0.61K and an electrocaloric strength Delta T/Delta E of 0.31K mm kV(-1), under a modest electric field Delta E of 20 kV cm(-1), which is comparable with the best values reported in lead-free materials. These enhanced values are attributed to the multiphase (four phases) coexistence at x = x(QP) corresponding to the quasi-quadruple point composition. (C) 2014 AIP Publishing LLC.

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GB/T 7714 Luo, Zhengdong , Zhang, Dawei , Liu, Yang et al. Enhanced electrocaloric effect in lead-free BaTi1-xSnxO3 ceramics near room temperature [J]. | APPLIED PHYSICS LETTERS , 2014 , 105 (10) .
MLA Luo, Zhengdong et al. "Enhanced electrocaloric effect in lead-free BaTi1-xSnxO3 ceramics near room temperature" . | APPLIED PHYSICS LETTERS 105 . 10 (2014) .
APA Luo, Zhengdong , Zhang, Dawei , Liu, Yang , Zhou, Di , Yao, Yonggang , Liu, Chenqi et al. Enhanced electrocaloric effect in lead-free BaTi1-xSnxO3 ceramics near room temperature . | APPLIED PHYSICS LETTERS , 2014 , 105 (10) .
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Rhombohedral-tetragonal phase coexistence and piezoelectric properties based on potassium-sodium niobate ternary system EI SCIE Scopus
期刊论文 | 2014 , 610 , 86-91 | JOURNAL OF ALLOYS AND COMPOUNDS | IF: 2.999
WoS CC Cited Count: 19
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In this work, the rhombohedral-tetragonal (R-T) phase coexistence has been designed using the ternary system consisting of (0.99-x)K0.48Na0.52NbO3-0.01B(0.5)Na(0.5)TiO(3) xBi(0.5)(Na0.7K0.2K0.2Li0.1)(0.5)ZrO3. The R-T phase coexistence zone was identified in the ceramics with 0.03 <= x < 0.05, as confirmed by the phase diagram derived from both temperature-dependent dielectric constant and the X-ray diffraction patterns. The relationship between R and T phase boundary and their electrical properties is investigated. For the compositions near the R-T phase boundary, the ceramics show the enhanced dielectric, ferroelectric, and piezoelectric properties. The ceramic with x = 0.035 has an optimum electrical behavior (e.g., d33 similar to 310 pC/N, kp similar to 0.45, P-r similar to 23.4 mu C/cm(2), E-c similar to 17.4 kV/cm, epsilon(r) similar to 1249, tan delta similar to 0.025, and T-c similar to 338 degrees C). In addition, the good temperature and thermal stability of ferroelectric and piezoelectric properties were shown in the ceramic with x = 0.035. Underlying physical mechanisms for enhanced electrical properties were addressed. As a result, the design of ternary system can effectively promote the piezoelectricity of potassium-sodium niobate materials. (C) 2014 Elsevier B.V. All rights reserved.

Keyword :

Lead-free piezoceramic High Curie temperature Phase boundary Electrical properties

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GB/T 7714 Cheng, Xiaojing , Wu, Jiagang , Zheng, Ting et al. Rhombohedral-tetragonal phase coexistence and piezoelectric properties based on potassium-sodium niobate ternary system [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2014 , 610 : 86-91 .
MLA Cheng, Xiaojing et al. "Rhombohedral-tetragonal phase coexistence and piezoelectric properties based on potassium-sodium niobate ternary system" . | JOURNAL OF ALLOYS AND COMPOUNDS 610 (2014) : 86-91 .
APA Cheng, Xiaojing , Wu, Jiagang , Zheng, Ting , Wang, Xiaopeng , Zhang, Binyu , Xiao, Dingquan et al. Rhombohedral-tetragonal phase coexistence and piezoelectric properties based on potassium-sodium niobate ternary system . | JOURNAL OF ALLOYS AND COMPOUNDS , 2014 , 610 , 86-91 .
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Rayleigh-like nonlinear dielectric response and its evolution during electrical fatigue in antiferroelectric (Pb,La)(Zr,Ti)O-3 thin film EI SCIE Scopus
期刊论文 | 2014 , 104 (14) | APPLIED PHYSICS LETTERS | IF: 3.302
WoS CC Cited Count: 9
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The Rayleigh-like nonlinear dielectric response and its evolution during electrical fatigue were systematically studied in antiferroelectric (Pb,La)(Zr,Ti)O-3 thin film. It is shown that the nonlinearity of dielectric permittivity can be described by the Rayleigh law under subswitching conditions. Electrical fatigue tests demonstrate that both the saturated polarization and the reversible/irreversible Rayleigh parameters show significant degradation after 10(9) switching cycles. These phenomena could be explained by considering the growth of an interface degraded layer between the electrode and the film resulting from the charge injection induced by repetitive electrical switching during bipolar fatigue. (C) 2014 AIP Publishing LLC.

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GB/T 7714 Luo, Zhengdong , Lou, Xiaojie , Zhang, Fuping et al. Rayleigh-like nonlinear dielectric response and its evolution during electrical fatigue in antiferroelectric (Pb,La)(Zr,Ti)O-3 thin film [J]. | APPLIED PHYSICS LETTERS , 2014 , 104 (14) .
MLA Luo, Zhengdong et al. "Rayleigh-like nonlinear dielectric response and its evolution during electrical fatigue in antiferroelectric (Pb,La)(Zr,Ti)O-3 thin film" . | APPLIED PHYSICS LETTERS 104 . 14 (2014) .
APA Luo, Zhengdong , Lou, Xiaojie , Zhang, Fuping , Liu, Yang , Chang, Dingding , Liu, Chenqi et al. Rayleigh-like nonlinear dielectric response and its evolution during electrical fatigue in antiferroelectric (Pb,La)(Zr,Ti)O-3 thin film . | APPLIED PHYSICS LETTERS , 2014 , 104 (14) .
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High strain in (K0.40Na0.60)(Nb0.955Sb0.045)O-3-Bi0.50Na0.50ZrO3 lead-free ceramics with large piezoelectricity EI SCIE Scopus
期刊论文 | 2014 , 2 (41) , 8796-8803 | JOURNAL OF MATERIALS CHEMISTRY C | IF: 4.696
WoS CC Cited Count: 45
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We have attained both large piezoelectricity and high strain in (1 - x)(K0.40Na0.60)(Nb0.955Sb0.045)O-3-xBi(0.50)Na(0.50)ZrO(3) [(1 - x)KNNS-xBNZ] lead-free ceramics by forming a rhombohedral (R) and tetragonal (T) phase boundary. The ceramics with 0.035 < x < 0.05 possess R and T phases' coexistence. A large d(33) value of similar to 450 pC N-1 has been attained when the x value reached 0.04 owing to the involved R-T phase boundary, which is higher with respect to d(33) similar to 416 pC N-1 of textured (K,Na,Li)(Nb,Ta,Sb)O-3 ceramics reported by Saito et al. [Nature, 2004, 432, 84]. In addition, it is worth noting that such a ceramic simultaneously possesses a high electric field-induced strain (0.2%) under a low driving electric field of similar to 2 kV mm(-1), and its S-max/E-max value is equal to be 1071 pm V-1. As a result, we can believe that the (1 - x)KNNS-xBNZ ceramics will become one of the promising material systems in the practical applications of electrical devices.

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GB/T 7714 Zheng, Ting , Wu, Jiagang , Cheng, Xiaojing et al. High strain in (K0.40Na0.60)(Nb0.955Sb0.045)O-3-Bi0.50Na0.50ZrO3 lead-free ceramics with large piezoelectricity [J]. | JOURNAL OF MATERIALS CHEMISTRY C , 2014 , 2 (41) : 8796-8803 .
MLA Zheng, Ting et al. "High strain in (K0.40Na0.60)(Nb0.955Sb0.045)O-3-Bi0.50Na0.50ZrO3 lead-free ceramics with large piezoelectricity" . | JOURNAL OF MATERIALS CHEMISTRY C 2 . 41 (2014) : 8796-8803 .
APA Zheng, Ting , Wu, Jiagang , Cheng, Xiaojing , Wang, Xiaopeng , Zhang, Binyu , Xiao, Dingquan et al. High strain in (K0.40Na0.60)(Nb0.955Sb0.045)O-3-Bi0.50Na0.50ZrO3 lead-free ceramics with large piezoelectricity . | JOURNAL OF MATERIALS CHEMISTRY C , 2014 , 2 (41) , 8796-8803 .
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