Li, Large electrocaloric effect in (Bi 0.5Na 0.5) 0.94Ba 0.06TiO 3 lead-free ferroelectric ceramics by La 2O 3 addition. Guerra, The effect of La-substitution on the energy-storage properties of NBT–BT lead-free ceramics. Lebrun, Enhancement of dielectric, piezoelectric, ferroelectric, and electrocaloric properties in slightly doped (Na 0.5Bi 0.5) 0.94Ba 0.06TiO 3 ceramic by samarium. Mouli, Observation of diffuse relaxor activity and normal thermal stability in Ho-modified NBT–BT lead free ceramics. Rödel, Giant electric-field-induced strains in lead-free ceramics for actuator applications-status and perspective. Zhao, Origin of enhanced depolarization temperature in quenched Na 0.5Bi 0.5TiO 3-BaTiO 3 ceramics. Hlinka, Piezoelectric properties of tetragonal single-domain Mn-doped NBT-6%BT single crystals. Rödel, Effect of Nb-donor and Fe-acceptor dopants in (Bi 1/2Na 1/2)TiO 3–BaTiO 3–(K 0.5Na 0.5)NbO 3 lead-free piezoceramics. Zhang, Progress and perspective of high strain NBT-based lead-free piezoceramics and multilayer actuators. Lebrun, Structural, dielectric, ferroelectric, and electrocaloric properties of 2% Gd 2O 3 doping (Na 0.5Bi 0.5) 0.94Ba 0 06TiO 3 ceramics. Kutnjak, Impact of critical point on piezoelectric and electrocaloric response in barium titanate. Kutnjak, Influence of the critical point on the electrocaloric response of relaxor ferroelectrics. Ishibashi, Electric field induced critical points and polarization rotations in relaxor ferroelectrics. Kang, Study of the morphotropic phase boundary in the lead-free Na 1/2Bi 1/2TiO 3-BaTiO 3 system by Raman spectroscopy. Tan, Creation and destruction of morphotropic phase boundaries through electrical poling: a case study of Lead-free (Bi 1/2Na 1/2)TiO 3-BaTiO 3 piezoelectrics. Galassi, Phase transitions and phase diagram of the ferroelectric perovskite of (Na 0.5Bi 0.5) 1−xBa xTiO 3 by anelastic and dielectric measurements. Yan, Type-I pseudo-first-order phase transition induced electrocaloric effect in lead-free Bi 0.5Na 0.5TiO 3–0.06BaTiO 3 ceramics. Lahmar, Structural, dielectric, and ferroelectric properties of Na 0.5(Bi 1-xNd x) 0.5TiO 3 ceramics for energy storage and electrocaloric applications. Zhu, Static and dynamic polar nanoregions in relaxor ferroelectric Ba(Ti 1−xSn x)O 3 system at high temperature. Bishop, Origin of polar nanoregions in relaxor ferroelectrics: nonlinearity, discrete breather formation, and charge transfer. Rödel, On the phase identity and its thermal evolution of lead free (Bi 1/2Na 1/2)TiO 3-6 mol% BaTiO 3. Trodahl, Structural complexity of NBT-BT as revealed by Raman spectroscopy. Sakata, (Bi 1/2Na 1/2)TiO 3-BaTiO 3 system for lead-free piezoelectric ceramics. Rabe, First-principles investigation of ferromagnetism and ferroelectricity in bismuth manganite. Spaldin, Theoretical prediction of new high-performance lead-free piezoelectrics. Zhang, Lead-free piezoelectric ceramics: alternatives for PZT? J. Jones, Advances in lead-free piezoelectric materials for sensors and actuators. Damjanovic, Perspective on the development of lead-free piezoceramics. Ren, Large piezoelectric effect in pb-free ceramics. The incorporation of Dy was found to enhance the EC responsivity coefficient ζ = iT/ΔE), with a best value of ζ = 0.24 K.mm/kV for y = 0.02. Using the direct EC measurement, the ceramic corresponding to y = 0.02 exhibited a significant EC response, where ΔT = 1.2 K under 5 kV/mm. Higher stability of the ferroelectric (FE) phase was obtained at room temperature for the compositions y = 0.01, 0.02 and 0.05, with optimum values for y = 0.02 as remanent polarization P r = 32♜/cm 2, as well as piezoelectric coefficients d 33 = 137 pC/N, k p = 0.27 and k t = 0.16, whereas a higher content of Dy ( y = 0.08) induced a remarkable decrease of the ferroelectric and piezoelectric properties. The evolution of the Raman spectra with temperature was found to be strongly correlated with the dielectric measurements. The structural changes with the introduction of Dy were confirmed by Raman spectroscopy at room temperature. X-ray diffraction analysis revealed the coexistence of tetragonal (P4mm) and rhombohedral (R3c) structural phases at low content of Dy ( y = 0.01, 0.02 and 0.05). The structural, vibrational dielectric, ferroelectric and electrocaloric (EC) properties of all samples were systematically investigated. We report the impact of dysprosium (Dy, with y = 0.01, 0.02, 0.05 and 0.08) substitution in (Na 0.5 Bi 0.5) 0.94 Ba 0.06TiO 3 (NBT-6BT) lead-free ceramics.
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