@article{otonicar_bradesko_fulanovic_kos_ursic_bencan_cabral_henriques_jones_riemer_et al._2020, title={Connecting the Multiscale Structure with Macroscopic Response of Relaxor Ferroelectrics}, volume={30}, ISSN={["1616-3028"]}, DOI={10.1002/adfm.202006823}, abstractNote={Abstract}, number={52}, journal={ADVANCED FUNCTIONAL MATERIALS}, author={Otonicar, Mojca and Bradesko, Andraz and Fulanovic, Lovro and Kos, Tomaz and Ursic, Hana and Bencan, Andreja and Cabral, Matthew J. and Henriques, Alexandra and Jones, Jacob L. and Riemer, Lukas and et al.}, year={2020}, month={Dec} }
 @article{bradesko_fulanovic_vrabelj_otonicar_ursic_henriques_chung_jones_malic_kutnjak_et al._2019, title={Electrocaloric fatigue of lead magnesium niobate mediated by an electric-field-induced phase transformation}, volume={169}, ISSN={["1873-2453"]}, DOI={10.1016/j.actamat.2019.03.017}, abstractNote={Electrocaloric fatigue, i.e., the degradation of the electrocaloric temperature change of an active material under continuous electric-field cycling, has not been addressed in detail so far, despite the elevated electric fields expected for EC cooling devices. Here, we investigate the electrocaloric fatigue mechanism of a prototype relaxor material, i.e., Pb(Mg1/3Nb2/3)O3, by directly measuring its temperature response under device-relevant electric-field conditions. We show that after a critical number of field cycles the temperature of the sample begins to increase dramatically, leading to a significant degradation of the cooling properties. The degradation of cooling properties is investigated using a combination of multiscale characterization techniques, revealing that the origin of the degradation is the increased grain boundary conductance caused by an unexpected electric-field-induced phase transformation to a ferroelectric phase. We further show that this transformation and thus the fatigue can be regulated by careful control of the temperature and electric-field conditions. By revealing a previously unexplored fatigue mechanism, this study provides the first guidelines for the integration of high-performance relaxors into cooling devices.}, journal={ACTA MATERIALIA}, author={Bradesko, Andraz and Fulanovic, Lovro and Vrabelj, Marko and Otonicar, Mojca and Ursic, Hana and Henriques, Alexandra and Chung, Ching-Chang and Jones, Jacob L. and Malic, Barbara and Kutnjak, Zdravko and et al.}, year={2019}, month={May}, pages={275–283} }