4 papers
Direct visualization of antiferroelectric switching dynamics via electrocaloric imaging
Pablo Vales-Castro, Miquel Vellvehi, Xavier Perpiñà +8
The large electrocaloric coupling in PbZrO3 allows using high-speed infrared imaging to visualize antiferroelectric switching dynamics via the associated temperature change. We fin…
Origin of the Large Negative Electrocaloric Effect in Antiferroelectric PbZrO3
Pablo Vales-Castro, Romain Faye, Miquel Vellvehi +9
We have studied the electrocaloric response of the archetypal antiferroelectric PbZrO3 as a function of voltage and temperature in the vicinity of its antiferroelectric-paraelectri…
Unconventional co-existence of insulating nano-regions and conducting filaments in reduced SrTiO3: mode softening, local piezoelectricity and metallicity
Annette Bussmann-Holder, Hugo Keller, Arndt Simon +2
Doped SrTiO3 becomes a metal at extremely low doping concentrations n and is even superconducting with the superconducting transition temperature adopting a dome-like shape with th…
Flexoelectricity in antiferroelectric ceramics
P. Vales-Castro, Krystian Roleder, Lei Zhao +3
Flexoelectricity (coupling between polarization and strain gradients) is a property of all dielectric materials that has been theoretically known for decades, but it is only relati…