Previous Publications

2014

D. Schneider, W. Jo, J. Rödel, D. Rytz, and T. Granzow, “Anisotropy of Ferroelectric Behavior of (1-x)Bi_1/2Na_1/2TiO₃-xBaTiO₃ Single Crystals across the Morphotropic Phase Boundary,” J. Appl. Phys., 116 [4] (2014) 044111, 9pp.

J. Zang, M. Li, D. Sinclair, T. Förmling, W. Jo, and J. Rödel, "Impedance Spectroscopy of (Bi_1/2Na_1/2)TiO₃-BaTiO₃ Based High-Temperature Dielectrics," J. Am. Ceram. Soc., 97 [9] (2014) 2825-31.

C. M. Fancher, W. Jo, J. Rödel, J. E. Blendell, and K. J. Bowen, “Effect of Texture on Temperature Dependent Properties of K_0.5Na_0.5NbO₃ Modified Bi_1/2Na_1/2TiO₃-xBaTiO₃,” J. Am. Ceram. Soc., 97 [8] (2014) 2557-63.

J. Zang, M. Li, D. C. Sinclair, W. Jo, and J. Rödel, “Impedance Spectroscopy of 0.94(Bi_1/2Na_1/2)TiO₃-0.06BaTiO₃ Ceramics Modified with (K_0.5Na_0.5)NbO₃,” J. Am. Ceram. Soc., 97 [5] (2014) 1523-29.

F.-Z. Yao, E. A. Patterson, K. Wang, W. Jo, J. Rödel, and J.-F. Li*, “Enhanced Bipolar Fatigue Resistance in CaZrO₃-Modified (K, Na)NbO₃ Lead-Free Piezoceramics,” Appl. Phys. Lett., 104 [24] (2014) 24291, 5pp.

C. Groh, W. Jo, and J. Rödel, “Frequency and Temperature Dependence of Actuating Performance of Bi_1/2Na_1/2TiO₃-BaTiO₃ Based Relaxor/Ferroelectric Composites," J. Appl. Phys., 115 [23] (2014) 234107, 6pp.

E. Sapper, N. Novak, W. Jo, T. Granzow, and J. Rödel, “Electric-Field-Temperature Phase Diagram of the Ferroelectric Relaxor System (1-x)Bi_1/2Na_1/2TiO₃-xBaTiO₃ Doped with Manganese,” J. Appl. Phys., 115 [19] (2014) 194104, 7pp.

M. Acosta, W. Jo, and J. Rödel, “Temperature and Frequency-Dependent Properties of the 0.75Bi_1/2Na_1/2TiO₃-0.25SrTiO₃,” J. Am. Ceram. Soc., 97 [6] (2014) 1937-43.

C. Groh, W. Jo, and J. Rödel, “Tailoring Strain Properties of (0.94-x)Bi_1/2Na_1/2TiO₃-0.06BaTiO₃-xK_0.5Na_0.5NbO₃ Ferroelectric/Relaxor Composites,” J. Am. Ceram. Soc., 97 [5] (2014) 1465-70.

N. H. Khansur, C. Groh, W. Jo, C. Reinhard, J. A. Kimpton, K. G. Webber, and J. E. Daniels, "Tailoring of Unipolar Strain in Lead-Free Piezoelectrics Using the Ceramic/Ceramic Composite Approach (vol 115, 124108, 2014)," J. Appl. Phys., 115 [17] (2014) 179903, 1pp.

N. H. Khansur, C. Groh, W. Jo, C. Reinhard, J. A. Kimpton, K. G. Webber, and J. E. Daniels, "Tailoring of Unipolar Strain in Lead-Free Piezoelectrics Using the Ceramic/Ceramic Composite Approach," J. Appl. Phys., 115 [12] (2014) 124108, 6pp.

D. I. Woodward, R. Dittmer, W. Jo, D. Walker, D. S. Keeble, M. W. Dale, J. Rödel, and P. A. Thomas, "Investigation of the Depolarisation Transition in Bi-Based Relaxor Ferroelectrics," J. Appl. Phys., 115 [11] (2014) 114109, 10pp.

R. Dittmer, D. Gobeljic, W. Jo, V. V. Shvartsman, D. C. Lupascu, J. L. Jones, and J. Rödel, “Ergodicity Reflected in Macroscopic and Microscopic Field-Dependent Behavior of BNT-Based Relaxors,” J. Appl. Phys. 115 [8] (2014) 084111, 10pp.

R. Dittmer, W. Jo, K. G. Webber, J. L. Jones, and J. Rödel, “Local Structure Change Evidenced by Temperature-Dependent Elastic Measurements: Case Study on Bi_1/2Na_1/2TiO₃-Based Lead-Free Relaxor Piezoceramics,” J. Appl. Phys. 115 [8] (2014) 084108, 7pp.

E. Sapper, A. Gassmann, L. Gjødvad, W. Jo, T. Granzow, and J. Rödel, “Cycling Stability of Lead-Free BNT-8BT and BNT-6BT-3KNN Multilayer Actuators and Bulk Ceramics,” J. Eur. Ceram. Soc. 34 [3] (2014) 653-61.

J. Zang, W. Jo, H. Zhang, and J. Rödel, “Bi_1/2Na_1/2TiO₃-BaTiO₃ based thick-film capacitors for high-temperature applications,” J. Eur. Ceram. Soc. 34 [1] (2014) 37-43.

C. Groh, D. J. Franzbach, W. Jo, K. G. Webber, J. Kling, L. A. Schmitt, H.-J. Kleebe, S.-J. Jeong, J.-S. Lee, J. Rödel, “Relaxor/Ferroelectric Composites: A Solution in the Quest for Practically Viable Lead-Free Incipient Piezoceramics,” Adv. Funct. Mater., 24 [3] (2014) 356-62.

H. Zhang, W. Jo, K. Wang, and K. G. Webber, “Compositional dependence of dielectric and ferroelectric properties in Mn-modified BiFeO₃-BaTiO₃ solid solutions” Ceram. Int. 40 [3] (2014) 4759-65.

2013

F.-Z. Yao, J. Glaum, K. Wang*, W. Jo, J. Rödel, and J.-F. Li*, “Fatigue-Free Unipolar Strain Behavior in CaZrO₃ and MnO₂ Co-Modified (K, Na)NbO₃-Based Lead-Free Piezoceramics,“ Appl. Phys. Lett. 103 [19] (2013) 192907, 4pp.

S. Zhukov*, Y. A. Genenko, M. Acosta, H. Humburg, W. Jo, J. Rödel, and H. von Seggern, “Polarization Dynamics across the Morphotropic Phase Boundary in Ba(Zr_0.2Ti_0.8)O₃-x(Ba_0.7Ca_0.3)TiO₃ Ferroelectrics,” Appl. Phys. Lett. 103 [15] (2013) 152904, 5pp.

K. Wang*, F. Yao, W. Jo, D. Gobeljic, V. V. Shvartsman, D. C. Lupascu, J.-F. Li, and J. Rödel, “Temperature-Insensitive (K, Na)NbO₃-Based Lead-Free Piezo Actuator Ceramics,” Adv. Funct. Mater. 23 [33] (2013) 4079-86.

J. Kling*, W. Jo, R. Dittmer, S. Schaab, H.-J. Kleebe, “Temperature Dependent Phase Transitions in the Lead-Free Piezoceramics (1-x-y)(Bi_1/2Na_1/2)TiO₃-xBaTiO₃-y(K_0.5Na_0.5)NbO₃ Observed by In Situ Transmission Electron Microscopy and Dielectric Measurements,” J. Am. Ceram. Soc., 96 [10] (2013) 3312-24.

W. Jo*, J. Daniels, D. Damjanovic, W. Kleemann, J. Rödel, “Two-Stage Processes of Electrically-Induced-Ferroelectric to Relaxor Transition in 0.94(Bi_1/2Na_1/2)TiO₃-0.06BaTiO₃,” Appl. Phys. Lett., 102 [20] (2013) 192903, 4pp.

V. D. N. Tran, T. H. Dinh, H.-S. Han, W. Jo, and J.-S. Lee*, “Lead-Free Bi_1/2(Na_0.82K_0.18)_1/2TiO₃ Relaxor Ferroelectrics with Temperature Insensitive Electrostrictive Coefficient,” Ceram. Int. 39 [S1] (2013) S119-S24.

H.-S. Han, W. Jo, J.-K. Kang, C. W. Ahn, I. W. Kim, K.-K. Ahn, and J.-S. Lee*, “Incipient Piezoelectrics and Electrostriction Behavior in Sn-doped BNT-BKT Lead-Free Ceramics,” J. Appl. Phys., 113 [15] (2013) 154102, 6pp.

R. Dittmer, K. G. Webber*, E. Aulbach, W. Jo, X. Tan, and J. Rödel, “Electric Field-Induced Polarization and Strain in 0.94(Bi_1/2Na_1/2)TiO₃-0.06BaTiO₃ Under Uniaxial Stress,” Acta Mater. 61 [4] (2013) 1350-58.

I. Levin*, I. M. Reaney, E.-M. Anton, W. Jo, J. Rödel, J. Pokorny, L. A. Schmitt, H.-J. Kleebe, M. Hinterstein, and J. L. Jones, “Local Structure, Pseudosymmetry, and Phase Transitions in Na_1/2Bi_1/2TiO₃-K_1/2Bi_1/2TiO₃ Ceramics,” Phys. Rev. B 87 [2] (2013) 024113, 11pp.

R. Dittmer, K. G. Webber*, E. Aulbach, W. Jo, X. Tan, and J. Rödel, “Optimal Working Regime of Lead-Zirconate-Titanate for Actuation Applications,” Sens. Actuat. A 189 [1] (2013) 187-94.

J. Zang, W. Jo*, and J. Rödel, “Quenching-Induced Circumvention of integrated aging effect of relaxor PLZT and (Bi_1/2Na_1/2)TiO₃-BaTiO₃,” Appl. Phys. Lett. 102 [3] (2013) 032901, 4pp.

2012

M. Acosta, J. Zang, W. Jo*, and J. Rödel, “High-Temperature Dielectrics in CaZrO₃-Modified Bi_1/2Na_1/2TiO₃-Based Lead-Free Ceramics,” J. Eur. Ceram. Soc. 32 [16] (2012) 4327-34.

R. Dittmer, E.-M. Anton, W. Jo*, H. Simons, J. E. Daniels, M. Hoffman, J. Pokorny, I. M. Reaney, and J. Rödel, “A High-Temperature-Capacitor Dielectric Based on K_0.5Na_0.5NbO₃-Modified Bi_1/2Na_1/2TiO₃-Bi_1/2K_1/2TiO₃,” J. Am. Ceram. Soc. 95 [11] (2012) 3519-24.

R. Dittmer, W. Jo, J. Rödel, S. V. Kalinin, and N. Balke*, “Nanoscale insight into lead-free BNT-BT-xKNN,” Adv. Funct. Mater. 22 [20] (2012) 4208-15.

E.-M. Anton*, L. A. Schmitt, M. Hinterstein, J. Trodahl, B. Kowalski, W. Jo, H.-J. Kleebe, J. Rödel, and J. L. Jones, “Structure and Temperature Dependent Phase Transitions of Lead-Free Bi_1/2Na_1/2TiO₃-Bi_1/2K_1/2TiO₃-K_0.5Na_0.5NbO₃ Piezoceramics,” J. Mater. Res. 27 [19] (2012) 2466-78. A content selected as the cover image.

H.-S. Han, W. Jo*, J. Rödel, I.-K. Hong, W.-P. Tai, and J.-S. Lee, “Coexistence of ergodicity and nonergodicity in LaFeO₃-modified Bi_1/2(Na_0.78K_0.22)_1/2TiO₃ relaxors,” J. Phys: Condens. Matter 24 [36] (2012) 365901, 6pp.

W. Jo*, R. Dittmer, M. Acosta, J. Zang, C. Groh, E. Sapper, K. Wang, and J. Rödel, “Giant electric-field-induced strains in lead-free ceramics for actuator applications – status and perspective,” INVITED Feature Article at J. Electroceram. 29 [1] (2012) 71-93.

R. Dittmer, W. Jo*, E. Aulbach, T. Granzow, and J. Rödel, “Frequency Dependence of Large-Signal Properties in Lead-Free Piezoceramics,” J. Appl. Phys. 112 [1] (2012) 014101, 7pp.

R. Dittmer, E. Aulbach, W. Jo, K. G. Webber*, and J. Rödel, ”Large Blocking Force in Bi_1/2Na_1/2TiO₃-Based Lead-Free Piezoceramics,” Scripta Mater. 67 [1] (2012) 100-103.

K. Wang, A. Hussein, W. Jo*, and J. Rödel, “Temperature Dependent Properties of (Bi_1/2Na_1/2)TiO₃-(Bi_1/2K_1/2)TiO₃-SrTiO₃ Lead-free Piezoceramics,” J. Am. Ceram. Soc. 95 [7] (2012) 2241-47.

E. Erdem, S. Schaab, W. Jo, A. Ozarowski, J. van Tol, R.-A. Eichel*, “High-Frequency EPR Analysis of MnO₂-Doped [Bi_0.5Na_0.5]TiO₃-BaTiO₃ Piezoelectric Ceramics – Manganese Oxidation States and Materials ‘Hardening’,” Ferroelectrics 428 [1] (2012) 116-21.

O-J. Kwon, Jo, S. Yoon, D. Shin, H. You, K. Choi, J.-S. Kim, and C. Park*, “Relation between Seebeck Coefficient and Lattice Parameters in (Ca_2-ySr_yCoO₃)_xCoO₂,” J. Electro. Mater. 41 [6] (2012) 1513-18.

T. Sebastian, I. Sterianou*, I. M. Reaney, T. Leist, W. Jo, and J. Rödel, “Piezoelectric Activity of (1-x)[0.35Bi(Mg_1/2Ti_1/2)O₃-0.3BiFeO₃-0.35BiScO₃] – xPbTiO₃ Ceramics as a Function of Temperature,” J. Electroceram. 28 [2-3] (2012) 95-100.

Y. A. Genenko*, S. V. Yampolskii, S. Zhukov, J. Schütrumpf, R. Dittmer, W. Jo, H. Kungl, M. J. Hoffmann, and H. von Seggern, ”Universal Polarization Switching Behaviour of Disordered Ferroelectrics,” Adv. Funct. Mater. 22 [10] (2012) 2058-66.

T. Leist, J. Chen, W. Jo*, E. Aulbach, J. Suffner, and J. Rödel, “Temperature Dependence of the Piezoelectric Coefficient in BiMeO₃-PbTiO₃ (Me=Fe, Sc, (Mg_1/2Ti_1/2)) Ceramics,” J. Am. Ceram. Soc. 95 [2] (2012) 711–15.

2011

Z. Luo, J. Glaum, T. Granzow, W. Jo, R. Dittmer, M. Hoffman*, and J. Rödel, “Bipolar and Unipolar Fatigue of Ferroelectric BNT based Lead-free Piezoceramics,” J. Am. Ceram. Soc. 94 [2] (2011) 529-35.

J. E. Daniels*, W. Jo, and W. Donner, “High-Energy Synchrotron X-Ray Diffraction for In-Situ Diffuse Scattering Studies of Bulk Single Crystals,” Journal of Metals (JOM) 64 [1] (2012) 174-80 (invited).

E. Sapper*, S. Schaab, W. Jo, T. Granzow, and J. Rödel, “Influence of Electric Fields on the Depolarization Temperature of Mn-Doped BNT-100xBT,” J. Appl. Phys. 111 [1] (2012) 014105, 6pp.

R. Dittmer, W. Jo*, J. Daniels, S. Schaab, and J. Rödel, “Relaxor Characteristics of Morphotropic Phase Boundary (Bi_1/2Na_1/2)TiO₃-(Bi_1/2K_1/2)TiO₃ Modified with Bi(Zn_1/2Ti_1/2)O₃,” J. Am. Ceram. Soc. 94 [12] (2011) 4283-90.

E.-M. Anton, W. Jo*, D. Damjanovic, and J. Rödel, ”Determination of Depolarization Temperature of (Bi_1/2Na_1/2)TiO₃-Based Lead-Free Piezoceramics,” J. Appl. Phys. 110 [9] (2011) 094108, 14pp.

Z. Luo, T. Granzow, J. Glaum, W. Jo, J. Rödel, and M. Hoffman*, “Effect of Ferroelectric Long-Range Order on the Unipolar and Bipolar Electric Fatigue in Bi_1/2Na_1/2TiO₃-Based Lead-Free Piezoceramics,” J. Am. Ceram. Soc. 94 [11] (2011) 3927–33.

W. Jo, J.-B. Ollagnier, E.-M. Anton, J.-L. Park, O-J. Kwon, C. Park*, H.-H. Seo, J.-S. Lee, E. Erdem, R.-A. Eichel, and J. Rödel, “CuO as a Sintering Additive for (Bi_1/2Na_1/2)TiO₃-BaTiO₃-(K_0.5Na_0.5)NbO₃ Lead-Free Piezoceramics,” J. Eur. Ceram. Soc. 31 [1-2] (2011) 2107-17.

W. Jo*, S. Schaab, E. Sapper, L. A. Schmitt, H.-J. Kleebe, A. J. Bell, and J. Rödel, “On the Phase Identity and Its Thermal Evolution of Lead-Free (Bi_1/2Na_1/2)TiO₃ - 6 mol% BaTiO₃,” J. Appl. Phys. 110 [7] (2011) 074106, 9pp. The second most cited paper in J. Appl. Phys. during 2012.

V. D. N. Tran, H.-S. Han, C.-H. Yoon, J.-S. Lee*, W. Jo, and J. Rödel, “Lead-Free Electrostrictive Bismuth Perovskite Ceramics with Thermally Stable Field-Induced Strains,” Mater. Lett. 65 [17-18] (2011) 2607-09.

K. G. Webber, Y. Seo, H.-Y. Lee, E. Aulbach, W. Jo*, and J. Rödel, “R-curve Behavior of Pb(Mg_1/3Nb_2/3)O₃-29 mol% PbTiO₃ single crystals: The Effect of Crystallographic Orientation and Grain Structure,” J. Am. Ceram. Soc. 94 [9] (2011) 2728-30.

M. Ehmke*, J. Glaum, W. Jo, T. Granzow, and J. Rödel, “Stabilization of the Fatigue Resistant Phase by CuO-Addition in (Bi_1/2Na_1/2)TiO₃-BaTiO₃,” J. Am. Ceram. Soc. 94 [8] (2011) 2473-78.

W. Jo* and J. Rödel, “Electric-Field-Induced Volume Change and Room Temperature Phase Stability of (Bi_1/2Na_1/2)TiO₃-x mol% BaTiO₃ Piezoceramics,” Appl. Phys. Lett. 99 [4] (2011) 042901, 3pp. Selected as a Research Highlight.

Y.-B. Chung, H.-K. Park, W. Jo, J.-H. Song, S.-H. Lee, and N.-M. Hwang*, “Low Temperature Deposition of Crystalline Silicon on a Glass Substrate,” J. Cryst. Growth 327 [1] (2011) 57-62.

L. A. Schmitt*, J. Kling, M. Hinterstein, M. Hölzel, W. Jo, H.-J. Kleebe, and H. Fuess, “Structural Investigations on Lead-Free Bi_0.5Na_0.5TiO₃-Based Piezoceramics,” INVITED Review Article at J. Mater. Sci. 46 [12] (2011) 4368-76.

J. E. Daniels*, W. Jo, J. Rödel, D. Rytz, and W. Donner, “Structural Origins of Relaxor Behavior of a 0.96(Bi_1/2Na_1/2)TiO₃-0.04BaTiO₃ Single Crystal under Electric Field,” Appl. Phys. Lett. 98 [25] (2011) 252904, 3pp.

E.-M. Anton, W. Jo*, J. Trodahl, D. Damjanovic, and J. Rödel, “Effect of K_0.5Na_0.5NbO₃ on Properties at and off the Morphotropic Phase Boundary in Bi_1/2Na_1/2TiO₃-Bi_1/2K_1/2TiO₃ Ceramics,” Jpn. J. Appl. Phys. 50 [5] (2011) 055802, 7pp.

O-J. Kwon, Jo, K.-E. Ko, J.-Y. Kim, S.-H. Bae, H. Koo, S.-M. Jeong, J.-S. Kim, and C. Park*, “Thermoelectric Properties and Texture Evaluation of Ca₃Co₄O₉ Prepared by a Cost-Effective Multisheet Cofiring Technique,” J. Mater. Sci. 46 [10] (2011) 2887-94.

J. Frederick, X. Tan*, and W. Jo, “Strain and Polarization during Antiferroelectric-Ferroelectric Phase Switching in Pb_0.99Nb_0.02[(Zr_0.57Sn_0.43)_1-yTi_y]_0.98O₃ Ceramics,” J. Am. Ceram. Soc. 94 [4] (2011) 1149-55.

T. Leist*, K. G. Webber, W. Jo, T. Granzow, E. Aulbach, J. Suffner, and J. Rödel, “Domain Switching Energies: Mechanical versus Electrical Loading in La-Doped Bismuth Ferrite – Lead Titanate,” J. Appl. Phys. 109 [5] (2011) 054109, 9pp.

H. Simons, J. Daniels, W. Jo, R. Dittmer, A. Studer, M. Avdeev, J. Rödel, and M. Hoffman*, “Electric-Field-Induced Strain Mechanisms in Lead-Free 94%(Bi_1/2Na_1/2)TiO₃-6%BaTiO₃,” Appl. Phys. Lett. 98 [8] (2011) 082901, 3pp.

R. Dittmer, W. Jo*, D. Damjanovic, and J. Rödel, “Lead-Free High-Temperature Dielectrics with Wide Operational Range,” J. Appl. Phys. 109 [3] (2011) 034107, 5pp.

W. Jo*, J. E. Daniels, J. L. Jones, X. Tan, P. A. Thomas, D. Damjanovic, and J. Rödel, "Evolving Morphotropic Phase Boundary in Lead-Free (Bi_1/2Na_1/2)TiO₃-BaTiO₃ Piezoceramics,” J. Appl. Phys. 109 [1] (2011) 014110, 7pp. The most cited paper in J. Appl. Phys. during 2012 & one of 14 most cited during 2000-2014.

2010

X. Tan*, J. Frederick, C. Ma, W. Jo, and J. Rödel, “Can Electric Field Induce an Antiferroelectric Phase out of a Ferroelectric Phase?,” Phys. Rev. Lett. 105 [25] (2010) 255702, 4pp.

M. Hinterstein*, M. Knapp, M. Hölzel, W. Jo, A. Cervellino, H. Ehrenberg, and H. Fuess, “Field Induced Phase Transition in Lead-Free 0.92BNT-0.06BT-0.02KNN,” J. Appl. Cryst. 43 [6] (2010) 1314-21.

T. Leist*, K. G. Webber, W. Jo, E. Aulbach, J. Rödel, A. D. Prewitt, J. L. Jacob, J. Schmidlin, and C. R. Hubbard, “Stress-Induced Structural Changes in La-Doped BiFeO₃-PbTiO₃ High Temperature Piezoceramics,” Acta Mater. 58 [18] (2010) 5962-71.

J. Kling, X. Tan, W. Jo, H.-J. Kleebe, H. Fuess, and J. Rödel, “In situ Transmission Electron Microscopy of Electric Field-Triggered Reversible Domain Formation in Bi-Based Lead Free Piezoceramics,” J. Am. Ceram. Soc. 93 [9] (2010) 2452-55.

W. Jo*, E. Erdem, R.-A. Eichel, J. Glaum, T. Granzow, D. Damjanovic, and J. Rödel, “Effect of Nb-Donor and Fe-Acceptor Dopants in (Bi_1/2Na_1/2)TiO₃-BaTiO₃-(K_0.5Na_0.5)NbO₃ Lead-Free Piezoceramics,” J. Appl. Phys. 108 [1] (2010) 014110, 6pp.

T. Leist*, T. Granzow, W. Jo, and J. Rödel, "Effect of Tetragonal Distortion on Ferroelectric Domain Switching: A Case Study on La-doped BiFeO₃-PbTiO₃ Ceramics,“ J. Appl. Phys. 108 [1] (2010) 014103, 6pp.

K. G. Webber*, Y. Zhang, W. Jo, J. Daniels, and J. Rödel, “High Temperature Stress-Induced “Double Loop-Like” Phase Transitions in Bi-Based Perovskites,” J. Appl. Phys. 108 [1] (2010) 014101, 6pp.

J. Chen*, X. Wang, W. Jo, and J. Rödel, “Microstructure and Electrical Properties of (1-x)PbTiO₃-xBi(Li_1/3Zr_2/3)O₃ Piezoelectric Ceramics,” J. Am. Ceram. Soc. 93 [6] (2010) 1692-96.

K. T. P. Seifert, W. Jo*, and J. Rödel, “Temperature Insensitive Large Strain of (Bi_1/2Na_1/2)TiO₃-(Bi_1/2K_1/2)TiO₃-(K_0.5Na_0.5)NbO₃ Lead-Free Piezoceramics,” J. Am. Ceram. Soc. 93 [5] (2010) 1392-96.

J. E. Daniels*, W. Jo, J. Rödel, V. Honkimäki, and J. L. Jones, “Electric-Field-Induced Phase Change Behavior in (Bi_0.5Na_0.5)TiO₃-BaTiO₃-(K_0.5Na_0.5)NbO₃: A Combinatorial Investigation,” Acta Mater. 58 [6] (2010) 2103-11.

W. Jo*, J. Rödel, J.-S. Lee, Y.-H. Baek, and C. Park, “Effect of Substitution of K for Na on the Ferroelectric Stability and Properties in (Bi_1/2Na_1/2)TiO₃-BaTiO₃-(K_0.5Na_0.5)NbO₃,” Special Issue on Ferroelectrics in Funct. Mater. Lett. 3 [1] (2010) 41-44 (invited).

X. Tan*, J. Frederick, C. Ma, E. Aulbach, M. Marsilius, W. Hong, T. Granzow, W. Jo, and J. Rödel, “Electric-Field-Induced Antiferroelectric to Ferroelectric Phase Transition in Mechanically Confined Pb_0.99Nb_0.02[(Zr_0.57Sn_0.43)_0.94Ti_0.06]_0.98O₃,” Phys. Rev. B 81 [1] (2010) 014103, 5pp.

2009

S.-T. Zhang, A. B. Kounga, W. Jo, C. Jamin, K. Seifert, T. Granzow, J. Rödel*, and D. Damjanovic, “High-Strain Lead-Free Antiferroelectric Electrostrictors,” Adv. Mater. 21 [46] (2009) 4716-20.

T. Leist, W. Jo*, J. Rödel, T. Comyn, and A. Bell, “Shift in Morphotropic Phase Boundary in La-Doped BiFeO₃-PbTiO₃ Piezoceramics,” Jpn. J. Appl. Phys. 48 [12] (2009) 120205, 3pp.

J-S. Hong, W. Jo*, K.-J. Ko, N.-M. Hwang, and D.-Y. Kim, “Equilibrium Shape of Nickel Crystal,” Phil. Mag. 89 [32] (2009) 2989-99.

X. Tan*, E. Aulbach, W. Jo, T. Granzow, J. Kling, M. Marsilius, H. J. Kleebe, and J. Rödel, ”Effect of Uniaxial Stress on Ferroelectric Properties of Lead-Free (Bi_1/2Na_1/2)TiO₃–BaTiO₃–(K_0.5Na_0.5)NbO₃ Piezoelectric Ceramics: a Comparative Study,” J. Appl. Phys. 106 [4] (2009) 044107, 7pp.

J. Chen*, X. Tan, W. Jo, and J. Rödel, “Temperature Dependence of Piezoelectric Properties of High-T_C Bi(Mg_1/2Ti_1/2)O₃-PbTiO₃,” J. Appl. Phys. 106 [3] (2009) 034109, 7pp.

J. E. Daniels*, W. Jo, J. Rödel, and J. L. Jones, “Electric-Field-Induced Phase Transformation at a Lead-Free Morphotropic Phase Boundary: Case Study in a 93%(Bi_0.5Na_0.5)TiO₃-7%BaTiO₃ Piezoelectric Ceramic,” Appl. Phys. Lett. 95 [3] (2009) 032904, 3pp.

J. Rödel*, W. Jo, K. T. P. Seifert, E.-M. Anton, T. Granzow, and D. Damjanovic, “Perspective on the Development of Lead-Free Piezoceramics,” INVITED Feature Article at J. Am. Ceram. Soc. 92 [6] (2009) 1153-77.

J-L. Park, C. Park*, D.-Y. Kim, W. Jo, C.-J. Park, S.-Y. Jeon, and J.-S. Lee, “Polarity Engineering in Polycrystalline ZnO by Inversion Boundaries,” Appl. Phys. Lett. 94 [25] (2009) 252108, 3pp.

W. Jo*, T. Granzow, E. Aulbach, J. Rödel, and D. Damjanovic, “Origin of the Large Strain Response in (K_0.5Na_0.5)NbO₃-Modified (Bi_0.5Na_0.5)TiO₃-BaTiO₃ Lead-Free Piezoceramics,” J. Appl. Phys. 105 [9] (2009) 094102, 5pp.

E. Dul’kin, E. Mojaev, M. Roth, W. Jo, and T. Granzow*, “Acoustic Emission Study of Domain Wall Motion and Phase Transition in (1−x−y)Bi_0.5Na_0.5TiO₃–xBaTiO₃–yK_0.5Na_0.5NbO₃ Lead-Free Piezoceramics,” Scripta Mater. 60 [4] (2009) 251-53.

T. X. Tan*, W. Jo, T. Granzow, J. Frederick, E. Aulbach, and J. Rödel, “Auxetic Behavior Under Electrical Loads in an Induced Ferroelectric Phase,” Appl. Phys. Lett. 94 [4] (2009) 042909 3pp.

2008

A .B. Kounga, S. Zhang, W. Jo*, T. Granzow, and J. Rödel, “Morphotropic Phase Boundary in (1-x)Bi_0.5Na_0.5TiO₃-xK_0.5Na_0.5NbO₃ Lead-Free Piezoceramics,” Appl. Phys. Lett. 92 [2] (2008) 222902, 3pp.

S. Zhang, A. B. Kounga, E. Aulbach, T. Granzow, W. Jo*, H.-J. Kleebe, and J. Rödel, “Lead-Free Piezoceramics with Giant Strain in the System Bi_0.5Na_0.5TiO₃-BaTiO₃-K_0.5Na_0.5NbO₃. I. Structure and Room Temperature Properties,” J. Appl. Phys. 103 [3] (2008) 034107, 8pp.

S. Zhang, A. B. Kounga, E. Aulbach, W. Jo*, T. Granzow, H. Ehrenberg, and J. Rödel, “Lead-Free Piezoceramics with Giant Strain in the System Bi_0.5Na_0.5TiO₃-BaTiO₃-K_0.5Na_0.5NbO₃. II. Temperature Dependent Properties,” J. Appl. Phys. 103 [3] (2008) 034108, 7pp.

2007