Publication
In Search of Ferroelectricity in Antiferroelectric Lead Zirconate
Publications associées (44)
Characterizing crystalline defects in single nanoparticles from angular correlations of single-shot diffracted X-rays
Christoph Bostedt, Alessandro Colombo, Giorgio Rossi
Characterizing and controlling the uniformity of nanoparticles is crucial for their application in science and technology because crystalline defects in the nanoparticles strongly affect their unique properties. Recently, ultra-short and ultra-bright X-ray ...
INT UNION CRYSTALLOGRAPHY2020Optoelectronic and magnetic properties induced by atomic defects in two-dimensional semiconductors
Two-dimensional (2D) materials have attracted increasing attention over the last decade owing to their remarkable mechanical, electrical and optical properties. Following the groundbreaking discovery of graphene, a plethora of other atomically-thin materia ...
EPFL2020Energy domain versus time domain precursor fluctuations above the Verwey transition in magnetite
Henrik Moodysson Rønnow, Fabrizio Carbone, Gregory Scott Tucker, Simone Borroni
We study the dynamics and interactions of the critical fluctuations of the Verwey transition in magnetite (Fe3O4) in the pretransition region by means of inelastic neutron scattering experiments on a natural single crystal. We find that a Delta(5) mode int ...
AMER PHYSICAL SOC2020Experimental Investigation of Pulsed Laser Deposition of Ferroelectric Gd:HfO2 in a CMOS BEOL Compatible Process
Mihai Adrian Ionescu, Igor Stolichnov, Eamon Patrick O'Connor, Matteo Cavalieri, Carlotta Gastaldi
In this work, we report an experimental investigation of pulsed laser deposition (PLD) of thin Gd:HfO2 layers at 330 degrees C, which show ferroelectric behavior after annealing at 450 degrees C, compatible with complementary metal-oxide-semiconductor back ...
AMER CHEMICAL SOC2020Large impact of strain on the electro-optic effect in (Ba, Sr)TiO3 thin films: Experiment and theoretical comparison
(001)-epitaxial (Ba0.5Sr0.5)TiO3 (BST) thin films with different magnitudes of compressive strain were fabricated on SrRuO3/SrTiO3 substrates by pulsed laser deposition, and their electro-optic (EO) properties were characterized by modulation ellipsometry ...
AMER INST PHYSICS2019Triggered incommensurate transition in PbHfO3
We report a type of structural phase transitions in dielectric materials: the triggered incommensurate (IC) transition. We demonstrate evidence for such a transition in the perovskite antiferroelectric PbHfO3 by means of single-crystal x-ray diffraction, d ...
AMER PHYSICAL SOC2019Reentrant magnetism at the borderline between long-range antiferromagnetic order and spin-glass behavior in the B-site disordered perovskite system Ca2-x SrxFeRuO6
We report on the coexistence of magnetic order and disorder in the atomically disordered double perovskites Ca2FeRuO6 and CaSrFeRuO6. Powder x-ray and neutron diffraction were used to investigate the crystal structure and magnetic ordering of these oxides. ...
AMER PHYSICAL SOC2018Origins of the macroscopic symmetry breaking in centrosymmetric phases of perovskite oxides
Many perovskite materials experience a temperature-driven phase transition at the Curie temperature from a non-centrosymmetric polar ferroelectric phase to a paraelectric phase, where polarization is lost. The paraelectric phase is usually centrosymmetric ...
EPFL2017Manipulation of the Two-Dimensional States at Titanates Surfaces studied by ARPES
The transition metal oxides are known for their versatile physical properties and are therefore an active field of research towards possible new functionalities and applications. This thesis focuses on the subgroup of titanates with perovskite structure th ...
EPFL2017Dynamics of ferroelectric 180 degrees domain walls at engineered pinning centers
The interaction between domain walls and pinning centers in ferroelectrics is of great interest from both fundamental and practical points of view. In this work, we show that, counter to intuition, the apparent velocity of domain walls can increase as the ...
Amer Inst Physics2017