47 citations · 197 across the 7 of their papers we have counts for
7 papers
Mesoscopic Origin of Ferroelectric-Ferroelectric Transition in BaTiO3
Asaf Hershkovitz, Florian Johann, Maya Barzilay +2
Ferroelectric materials are the core of common technologies, such as medical ultrasound, mobile-phone antennae and low-power memory devices. The technological interest in ferroelec…
Stability of 71° stripe domains in epitaxial BiFeO3 films upon repeated electrical switching
Florian Johann, Alessio Morelli, Ionela Vrejoiu
The 71° stripe domain patterns of epitaxial BiFeO3 thin films are frequently being explored to achieve new functional properties, dissimilar from the BiFeO3 bulk properties. We sho…
Impact of Electrostatic Forces in Contact Mode Scanning Force Microscopy
F. Johann, Á. Hoffmann, E. Soergel
In this contribution we address the question to what extent surface charges affect contact-mode scanning force microscopy measurements. % We therefore designed samples where…
Quantitative measurement of the surface charge density
Florian Johann, Elisabeth Soergel
We present a method of measuring the charge density on dielectric surfaces. Similar to electrostatic force microscopy we record the electrostatic interaction between the probe and…
Lateral Signals in Piezoresponse Force Microscopy at Domain Boundaries of Ferroelectric Crystals
Florian Johann, Tobias Jungk, Martin Lilienblum +2
In piezoresponse force microscopy a lateral signal at the domain boundaries is occasionally observed. In recent years, a couple of experiments have been reported and varying explan…
Sol-Gel Derived Ferroelectric Nanoparticles Investigated by Piezoresponse Force Microscopy
F. Johann, T. Jungk, S. Lisinski +3
Piezoresponse force microscopy (PFM) was used to investigate the ferroelectric properties of sol-gel derived LiNbO nanoparticles. To determine the degree of ferroelectricity we…
Depth Resolution of Piezoresponse Force Microscopy
Florian Johann, Yongjun J. Ying, Tobias Jungk +5
Given that a ferroelectric domain is generally a three dimensional entity, the determination of its area as well as its depth is mandatory for full characterization. Piezoresponse…