2019

Schultheiß, Jan ; Kungl, Hans ; Koruza, Jurij (2019)
Influence of crystallographic structure on polarization reversal in polycrystalline ferroelectric/ferroelastic materials.
In: Journal of Applied Physics, 2019 (125)
doi: 10.1063/1.5081086
Artikel, Bibliographie

2018

Schultheiß, Jan ; Liu, Lisha ; Kungl, Hans ; Weber, Michael ; Kodumudi Venkataraman, Lalitha ; Checchia, Stefano ; Damjanovic, Dragan ; Daniels, John E. ; Koruza, Jurij (2018)
Revealing the sequence of switching mechanisms in polycrystalline ferroelectric/ferroelastic materials.
In: Acta Materialia, 2018 (157)
doi: 10.1016/j.actamat.2018.07.018
Artikel, Bibliographie

2016

Zhukov, S. ; Glaum, Julia ; Kungl, Hans ; Sapper, Eva ; Dittmer, Robert ; Genenko, Yuri A. ; Seggern, Heinz von (2016)
Fatigue effect on polarization switching dynamics in polycrystalline bulk ferroelectrics.
In: Journal of Applied Physics, 120 (6)
doi: 10.1063/1.4960691
Artikel, Bibliographie

2015

Schmitt, Ljubomira Ana ; Kungl, Hans ; Hinterstein, Manuel ; Riekehr, Lars ; Kleebe, Hans-Joachim ; Hoffmann, Michael J. ; Eichel, Rüdiger-A. ; Fuess, Hartmut ; Johnson, D. (2015)
The Impact of Heat Treatment on the Domain Configuration and Strain Behavior in Pb[Zr,Ti]O3Ferroelectrics.
In: Journal of the American Ceramic Society, 98 (1)
doi: 10.1111/jace.13253
Artikel, Bibliographie

2014

Zhukov, Sergey ; Kungl, Hans ; Genenko, Yuri A. ; Seggern, Heinz von (2014)
Statistical electric field and switching time distributions in PZT 1Nb2Sr ceramics: Crystal- and microstructure effects.
In: Journal of Applied Physics, 115 (1)
doi: 10.1063/1.4860335
Artikel, Bibliographie

Schmitt, Ljubomira Ana ; Schrade, David ; Kungl, Hans ; Xu, Bai-Xiang ; Mueller, Ralf ; Hoffmann, Michael J. ; Kleebe, Hans-Joachim ; Fuess, Hartmut (2014)
Bimodal domain configuration and wedge formation in tetragonal Pb[Zr1−xTix]O3 ferroelectrics.
In: Computational Materials Science, 81
doi: 10.1016/j.commatsci.2013.07.020
Artikel, Bibliographie

Schmitt, Ljubomira Ana ; Schrade, David ; Kungl, Hans ; Xu, Bai-Xiang ; Müller, Ralf ; Hoffmann, Michael J. ; Kleebe, Hans-Joachim ; Fuess, Hartmut (2014)
Bimodal domain configuration and wedge formation in tetragonal Pb{Zr1}−{xTix}{O3} ferroelectrics.
In: Computational Materials Science, 81
doi: 10.1016/j.commatsci.2013.07.020
Artikel, Bibliographie

2012

Picht, Gunnar ; Webber, Kyle G. ; Zhang, Yining ; Kungl, Hans ; Damjanovic, Dragan ; Hoffmann, Michael J. (2012)
Critical mechanical and electrical transition behavior of BaTiO3: The observation of mechanical double loop behavior.
In: Journal of Applied Physics, 112 (12)
doi: 10.1063/1.4767059
Artikel, Bibliographie

Glaum, Julia ; Genenko, Yuri A. ; Kungl, Hans ; Schmitt, Ljubomira A. ; Granzow, Torsten (2012)
De-aging of Fe-doped lead-zirconate-titanate ceramics by electric field cycling: 180°- vs. non-180° domain wall processes.
In: Journal of Applied Physics, 112 (3)
doi: 10.1063/1.4739721
Artikel, Bibliographie

Genenko, Yuri A. ; Zhukov, Sergey ; Yampolskii, Sergey V. ; Schütrumpf, Jörg ; Dittmer, Robert ; Jo, Wook ; Kungl, Hans ; Hoffmann, Michael J. ; Seggern, Heinz von (2012)
Universal Polarization Switching Behavior of Disordered Ferroelectrics.
In: Advanced Functional Materials, 22 (11)
doi: 10.1002/adfm.201102841
Artikel, Bibliographie

2011

Hinterstein, Manuel ; Hoelzel, Markus ; Kungl, Hans ; Hoffmann, Michael J. ; Ehrenberg, Helmut ; Fuess, Hartmut (2011)
In situ neutron diffraction study of electric field induced structural transitions in lanthanum doped lead zirconate titanate.
In: Zeitschrift für Kristallographie, 226 (2)
doi: 10.1524/zkri.2011.1338
Artikel, Bibliographie

2010

Hinterstein, Manuel ; Schönau, Kristin A. ; Kling, Jens ; Fuess, Hartmut ; Knapp, Michael ; Kungl, Hans ; Hoffmann, Michael J. (2010)
Influence of lanthanum doping on the morphotropic phase boundary of lead zirconate titanate.
In: Journal of Applied Physics, 108 (2)
doi: 10.1063/1.3437399
Artikel, Bibliographie

Kungl, Hans ; Hoffmann, Michael J. (2010)
Effects of sintering temperature on microstructure and high field strain of niobium-strontium doped morphotropic lead zirconate titanate.
In: Journal of Applied Physics, 107 (5)
doi: 10.1063/1.3294648
Artikel, Bibliographie

Eichel, Rüdiger-A. ; Kungl, Hans (2010)
Recent developments and future perspectives of lead-free ferroelectrics.
In: Functional Materials Letters, 3 (1)
doi: 10.1142/S179360471000097X
Artikel, Bibliographie

2009

Genenko, Yuri A. ; Glaum, Julia ; Hirsch, O. ; Kungl, Hans ; Hoffmann, Michael J. ; Granzow, Torsten (2009)
Aging of poled ferroelectric ceramics due to relaxation of random depolarization fields by space-charge accumulation near grain boundaries.
In: Physical Review B, 80 (224109)
doi: 10.1103/PhysRevB.80.224109
Artikel, Bibliographie

Van Tol, J. ; Dinse, Klaus-Peter ; Kungl, Hans ; Hoffmann, Michael J. (2009)
Pulsed High-Frequency EPR Investigation of Gadolinium-Doped PbZrO3 and PbTiO3.
In: Applied Magnetic Resonance, 36 (2-4)
doi: 10.1007/s00723-009-0026-2
Artikel, Bibliographie

Eichel, Rüdiger-A. ; Erünal, Ebru ; Drahus, Michael D. ; Smyth, Donald M. ; Van Tol, Johan ; Acker, Jérôme ; Kungl, Hans ; Hoffmann, Michael J. (2009)
Local variations in defect polarization and covalent bonding in ferroelectric Cu2+-doped PZT and KNN functional ceramics at the morphotropic phase boundary.
In: Physical Chemistry Chemical Physics, 11 (39)
doi: 10.1039/b905642d
Artikel, Bibliographie

Silvestroni, Laura ; Kleebe, Hans-Joachim ; Kungl, Hans ; Lauterbach, Stefan ; Müller, Mathis M. ; Hoffmann, Michael J. (2009)
Lead Zirconate Titanate-Magnetoplumbite Composites: A First Step Toward Multiferroic Ceramics?
In: Journal of the American Ceramic Society, 92 (10)
doi: 10.1111/j.1551-2916.2009.03192.x
Artikel, Bibliographie

Eichel, Rüdiger-A. ; Drahus, Michael D. ; Jakes, Peter ; Erünal, Ebru ; Erdem, Emre ; Parashar, Sandeep Kumar ; Kungl, Hans ; Hoffmann, Michael J. (2009)
Defect structure and formation of defect complexes in Cu2+-modified metal oxides derived from a spin-Hamiltonian parameter analysis.
In: Molecular Physics, 107 (19)
doi: 10.1080/00268970903084920
Artikel, Bibliographie

Kleebe, Hans-Joachim ; Lauterbach, Stefan ; Silvestroni, Laura ; Kungl, Hans ; Hoffmann, Michael J. ; Erdem, Emre ; Eichel, Rüdiger-A. (2009)
Formation of magnetic grains in ferroelectric Pb[Zr0.6Ti0.4]O3 ceramics doped with Fe3+ above the solubility limit.
In: Applied Physics Letters, 94 (14)
doi: 10.1063/1.3103313
Artikel, Bibliographie

Westram, Ilona ; Kungl, Hans ; Hoffmann, Michael J. ; Rödel, Jürgen (2009)
Influence of crystal structure on crack propagation under cyclic electric loading in lead–zirconate–titanate.
In: Journal of the European Ceramic Society, 29 (3)
doi: 10.1016/j.jeurceramsoc.2008.05.050
Artikel, Bibliographie

2008

Hall, D. A. ; Mori, T. ; Withers, P. J. ; Kungl, Hans ; Hoffmann, Michael J. ; Wright, J. (2008)
Domain switching in rhombohedral PZT ceramics under electrical and mechanical loading.
In: Materials Science and Technology, 24 (8)
doi: 10.1179/174328408X302611
Artikel, Bibliographie

Farooq, M. U. ; Villaurrutia, R. ; MacLaren, I. ; Burnett, T. L. ; Comyn, Timothy P. ; Bell, Andrew J. ; Kungl, Hans ; Hoffmann, Michael J. (2008)
Electron backscatter diffraction mapping of herringbone domain structures in tetragonal piezoelectrics.
In: Journal of Applied Physics, 104 (2)
doi: 10.1063/1.2956704
Artikel, Bibliographie

Erdem, Emre ; Drahus, Michael D. ; Eichel, Rüdiger-A. ; Kungl, Hans ; Hoffmann, Michael J. ; Ozarowski, Andrew ; Van Tol, Johan ; Brunel, Louis Claude (2008)
DEFECT STRUCTURE IN "SOFT" (Gd,Fe)-CODOPED PZT 52.5/47.5 PIEZOELECTRIC CERAMIC.
In: Functional Materials Letters, 1 (1)
doi: 10.1142/S1793604708000034
Artikel, Bibliographie

Kungl, Hans ; Hoffmann, Michael J. (2008)
Method for the estimation of the total displacement of ferroelectric actuators under mixed thermal and electrical loading.
In: Sensors and Actuators A: Physical, 144 (2)
doi: 10.1016/j.sna.2008.01.021
Artikel, Bibliographie

Farooq, M. U. ; Villaurrutia, R. ; MacLaren, I. ; Kungl, Hans ; Hoffmann, Michael J. ; Fundenberger, J.-J. ; Bouzy, E. (2008)
Using EBSD and TEM-Kikuchi patterns to study local crystallography at the domain boundaries of lead zirconate titanate.
In: Journal of Microscopy, 230 (3)
doi: 10.1111/j.1365-2818.2008.02004.x
Artikel, Bibliographie

Erdem, Emre ; Eichel, Rüdiger-A. ; Kungl, Hans ; Hoffmann, Michael J. ; Ozarowski, Andrew ; Van Tol, Johan ; Brunei, L. C. (2008)
Characterization of (Fe_Zr,Ti-V_o ^ldrldr)^ldr defect dipoles in (La,Fe)-codoped PZT 52.5/47.5 piezoelectric ceramics by multifrequency electron paramagnetic resonance spectroscopy.
In: IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 55 (5)
doi: 10.1109/TUFFC.2008.757
Artikel, Bibliographie

Schmitt, Ljubomira A. ; Theissmann, Ralf ; Kling, Jens ; Kungl, Hans ; Hoffmann, Michael J. ; Fuess, Hartmut (2008)
In situ hot-stage transmission electron microscopy of Pb(Zr0.52Ti0.48)O3.
In: Phase Transitions, 81 (4)
doi: 10.1080/01411590701695778
Artikel, Bibliographie

Eichel, Rüdiger-A. ; Erhart, Paul ; Träskelin, Petra ; Albe, Karsten ; Kungl, Hans ; Hoffmann, Michael J. (2008)
Defect-Dipole Formation in Copper-Doped PbTiO3 Ferroelectrics.
In: Physical Review Letters, 100 (9)
doi: 10.1103/PhysRevLett.100.095504
Artikel, Bibliographie

2007

Balke, Nina ; Kungl, Hans ; Granzow, Torsten ; Lupascu, Doru C. ; Hoffmann, Michael J. ; Rödel, Jürgen (2007)
Bipolar Fatigue Caused by Field Screening in Pb(Zr,Ti)O3Ceramics.
In: Journal of the American Ceramic Society, 90 (12)
doi: 10.1111/j.1551-2916.2007.02041.x
Artikel, Bibliographie

Erdem, Emre ; Eichel, Rüdiger-A. ; Kungl, Hans ; Hoffmann, Michael J. ; Ozarowski, Andrew ; Van Tol, Hans ; Brunel, Louis Claude (2007)
Local symmetry-reduction in tetragonal (La,Fe)-codoped Pb[Zr0.4Ti0.6]O3 piezoelectric ceramics.
In: Physica Scripta, (T129)
doi: 10.1088/0031-8949/2007/T129/003
Artikel, Bibliographie

Schönau, Kristin ; Knapp, Michael ; Kungl, Hans ; Hoffmann, Michael J. ; Fuess, Hartmut (2007)
In situ synchrotron diffraction investigation of morphotropic Pb[Zr1−xTix]O3 under an applied electric field.
In: Physical Review B, 76 (14)
doi: 10.1103/PhysRevB.76.144112
Artikel, Bibliographie

Fett, Theo ; Kungl, Hans ; Hoffmann, Michael J. (2007)
Permittivity and loss tangent of unpoled LaSr-doped PZT under compressive loading.
In: Journal of Materials Science, 42 (20)
doi: 10.1007/s10853-007-1962-6
Artikel, Bibliographie

Kungl, Hans ; Hoffmann, Michael J. (2007)
Temperature dependence of poling strain and strain under high electric fields in LaSr-doped morphotropic PZT and its relation to changes in structural characteristics.
In: Acta Materialia, 55 (17)
doi: 10.1016/j.actamat.2007.06.035
Artikel, Bibliographie

Puff, Werner ; Balke, Nina ; Kungl, Hans ; Hoffmann, Michael J. ; Balogh, Adam G. (2007)
Effect of Fe-doping and electrical load on the defect structure of Pb(ZrxTi1-x)O3ferroelectric ceramics.
In: physica status solidi (c), 4 (10)
doi: 10.1002/pssc.200675863
Artikel, Bibliographie

Theissmann, Ralf ; Schmitt, Ljubomira A. ; Kling, Jens ; Schierholz, Roland ; Schönau, Kristin A. ; Fuess, Hartmut ; Knapp, Michael ; Kungl, Hans ; Hoffmann, Michael J. (2007)
Nanodomains in morphotropic lead zirconate titanate ceramics: On the origin of the strong piezoelectric effect.
In: Journal of Applied Physics, 102 (2)
doi: 10.1063/1.2753569
Artikel, Bibliographie

Schönau, Kristin A. ; Schmitt, Ljubomira A. ; Knapp, Michael ; Fuess, Hartmut ; Eichel, Rüdiger-A. ; Kungl, Hans ; Hoffmann, Michael J. (2007)
Nanodomain structure of Pb[Zr_{1−x}Ti_{x}]O_{3} at its morphotropic phase boundary: Investigations from local to average structure.
In: Physical Review B, 75 (18)
doi: 10.1103/PhysRevB.75.184117
Artikel, Bibliographie

Schmitt, Ljubomira A. ; Schönau, Kristin A. ; Theissmann, Ralf ; Fuess, Hartmut ; Kungl, Hans ; Hoffmann, Michael J. (2007)
Composition dependence of the domain configuration and size in Pb(Zr[sub 1−x]Ti[sub x])O[sub 3] ceramics.
In: Journal of Applied Physics, 101 (7)
doi: 10.1063/1.2715476
Artikel, Bibliographie

Kungl, Hans ; Theissmann, Ralf ; Knapp, Michael ; Baehtz, Carsten ; Fuess, Hartmut ; Wagner, Susanne ; Fett, Theo ; Hoffmann, Michael J. (2007)
Estimation of strain from piezoelectric effect and domain switching in morphotropic PZT by combined analysis of macroscopic strain measurements and synchrotron X-ray data.
In: Acta Materialia, 55 (6)
Artikel, Bibliographie

Kungl, Hans ; Fett, Theo ; Wagner, Susanne ; Hoffmann, Michael J. (2007)
Nonlinearity of strain and strain hysteresis in morphotropic LaSr-doped lead zirconate titanate under unipolar cycling with high electric fields.
In: Journal of Applied Physics, 101 (4)
doi: 10.1063/1.2434836
Artikel, Bibliographie

Schoenau, Kristin A. ; Knapp, Michael ; Kungl, Hans ; Hoffmann, Michael J. ; Fuess, Hartmut (2007)
In situ synchrotron diffraction investigation of morphotropic Pb[Zr1-xTix]O-3 under an applied electric field.
In: Physical Review B, 76
Artikel, Bibliographie

Theissmann, Ralf ; Schmitt, Ljubomira A. ; Kling, Jens ; Schierholz, Roland ; Schoenau, Kristin A. ; Fuess, Hartmut ; Knapp, Michael ; Kungl, Hans ; Hoffmann, Michael J. (2007)
Nanodomains in morphotropic lead zirconate titanate ceramics : on the origin of the strong piezoelectric effect.
In: Journal of Applied Physics, 102
Artikel, Bibliographie

2006

Granzow, Torsten ; Suvaci, Ender ; Kungl, Hans ; Hoffmann, Michael J. (2006)
Deaging of heat-treated iron-doped lead zirconate titanate ceramics.
In: Applied Physics Letters, 89 (26)
doi: 10.1063/1.2425035
Artikel, Bibliographie

Meštrić, Hrvoje ; Eichel, Rüdiger-A. ; Dinse, Klaus-Peter ; Ozarowski, Andrew ; Van Tol, Johan ; Brunel, Louis ; Kungl, Hans ; Hoffmann, Michael ; Schönau, Kristin ; Knapp, Michael ; Fuess, Hartmut (2006)
Iron-oxygen vacancy defect association in polycrystalline iron-modified PbZrO3 antiferroelectrics: Multifrequency electron paramagnetic resonance and Newman superposition model analysis.
In: Physical Review B, 73 (18)
doi: 10.1103/PhysRevB.73.184105
Artikel, Bibliographie

Eichel, Rüdiger-A. ; Meštrić, Hrvoje ; Kungl, Hans ; Hoffmann, Michael J. (2006)
Multifrequency electron paramagnetic resonance analysis of polycrystalline gadolinium-doped PbTiO[sub 3]—Charge compensation and site of incorporation.
In: Applied Physics Letters, 88 (12)
doi: 10.1063/1.2185258
Artikel, Bibliographie

2005

Eichel, Rüdiger-A. ; Meštrić, Hrvoje ; Dinse, Klaus-Peter ; Ozarowski, Andrew ; Van Tol, Johan ; Brunel, Louis Claude ; Kungl, Hans ; Hoffmann, Michael J. (2005)
High-field/high-frequency EPR of paramagnetic functional centers in Cu2+- and Fe3+-modified polycrystalline Pb[ZrxTi1−x]O3 ferroelectrics.
In: Magnetic Resonance in Chemistry, 43 (S1)
doi: 10.1002/mrc.1696
Artikel, Bibliographie

MacLaren, Ian ; Schmitt, Ljubomira A. ; Fuess, Hartmut ; Kungl, Hans ; Hoffmann, Michael J. (2005)
Experimental measurement of stress at a four-domain junction in lead zirconate titanate.
In: Journal of Applied Physics, 97 (9)
doi: 10.1063/1.1886910
Artikel, Bibliographie

Eichel, Rüdiger-A. ; Dinse, Klaus-Peter ; Kungl, Hans ; Hoffmann, Michael J. ; Ozarowski, Andrew ; Van Tol, Johan ; Brunel, Louis Claude (2005)
Exploring the morphotropic phase boundary in copper(II)-modified Pb[Zr0.54Ti0.46]O3 ferroelectrics.
In: Applied Physics A, 80 (1)
Artikel, Bibliographie

2004

Gottschalk, Sebastian ; Hahn, Horst ; Balogh, Adam G. ; Puff, Werner ; Kungl, Hans ; Hoffmann, Michael J. (2004)
A positron lifetime study of lanthanum and niobium doped Pb(Zr[sub 0.6]Ti[sub 0.4])O[sub 3].
In: Journal of Applied Physics, 96 (12)
doi: 10.1063/1.1810198
Artikel, Bibliographie

Puff, Werner ; Kungl, Hans ; Hoffmann, Michael J. ; Gottschalk, Sebastian ; Balogh, Adam G. (2004)
Vacancy-like defects in doped Pb(Zr60Ti40)O-3 observed by positron lifetime and coincident Doppler spectroscopy.
In: POSITRON ANNIHILATION, ICPA-13, PROCEEDINGS, 445 (6)
Artikel, Bibliographie

Eichel, Rüdiger-A. ; Kungl, Hans ; Hoffmann, Michael J. (2004)
Determination of functional center local environment in copper-modified Pb[Zr[sub 0.54]Ti[sub 0.46]]O[sub 3] ceramics.
In: Journal of Applied Physics, 95 (12)
doi: 10.1063/1.1728310
Artikel, Bibliographie

Hoffmann, Michael J. ; Kungl, Hans (2004)
High strain lead-based perovskite ferroelectrics.
In: Current Opinion in Solid State and Materials Science, 8 (1)
doi: 10.1016/j.cossms.2003.12.003
Artikel, Bibliographie