A5052128075- Ferroelectric and Piezoelectric Materials
- Electronic and Structural Properties of Oxides
- Advanced Memory and Neural Computing
- Acoustic Wave Resonator Technologies
- Multiferroics and related materials
- Electrochemical sensors and biosensors
- Ferroelectric and Negative Capacitance Devices
- Semiconductor materials and devices
- Characterization and Applications of Magnetic Nanoparticles
- Magnetic and transport properties of perovskites and related materials
- Advanced Sensor and Energy Harvesting Materials
- Conducting polymers and applications
- Optical Coatings and Gratings
- Metallic Glasses and Amorphous Alloys
- Neural Networks and Reservoir Computing
- X-ray Diffraction in Crystallography
- Magnetic properties of thin films
- Ultrasonics and Acoustic Wave Propagation
- Shape Memory Alloy Transformations
- Theoretical and Computational Physics
- Transition Metal Oxide Nanomaterials
- Electrochemical Analysis and Applications
- Analytical Chemistry and Sensors
- Microstructure and Mechanical Properties of Steels
- Advanced Condensed Matter Physics
Universitat Autònoma de Barcelona
2021-2025
Institut Català de Nanociència i Nanotecnologia
2021-2023
University of Belgrade
2019
Dissociation and adsorption of water on ferroelectric oxide surfaces play important role in the processes screening switching dynamics polarization, as well catalytic which can be additionally coupled with light, temperature or vibration stimuli. In this work, we present XPS study BaTiO3 thin films determine entanglement between surface chemistry, polarization direction stability, by observing changes upon time exposure to environmental conditions, heating O2 atmosphere irradiation vacuum....
Rapid progress in information technologies has spurred the need for innovative memory concepts, which advanced data-processing methods and tailor-made materials are required. Here we introduce a previously unexplored nanoscale magnetic object: an analog vortex controlled by electric-field-induced ion motion, termed magneto-ionic or "vortion". This state arises from paramagnetic FeCoN through voltage gating gradual N3– extraction within patterned nanodots. Unlike traditional states, vortions...
Magneto-ionics, which refers to the modification of magnetic properties materials through electric-field-induced ion migration, is emerging as one most promising methods develop nonvolatile energy-efficient memory and spintronic magnetoelectric devices. Herein, controlled generation ferromagnetism from paramagnetic Co-Ni oxide patterned microdisks (prepared upon thermal oxidation metallic with dissimilar ratios, i.e., Ni25Co75 Ni50Co50) demonstrated under action voltage. The effect related...
<title>Abstract</title> A fundamental understanding of the interplay between lattice structure, polarization and electrons is pivotal to optical control ferroelectrics. The interaction light matter enables remote wireless ferroelectric on picosecond timescale, while inducing strain, i.e., deformation. At equilibrium, proportional typically assumed be so also out equilibrium. Decoupling from strain would remove constraint sample design provide an effective knob manipulate by light. Here, upon...
With the advent of Big Data, traditional digital computing is struggling to cope with intricate tasks related data classification or pattern recognition. To mitigate this limitation, software‐based neural networks are implemented, but they run in conventional computers whose operation principle (with separate memory and data‐processing units) highly inefficient compared human brain. Brain‐inspired in‐memory achieved through a wide variety methods, for example, artificial synapses, spiking...
Optical means instead of electric fields may offer a new pathway for low-power and wireless control magnetism, holding great potential to design next-generation memory spintronic devices. Artificial multiferroic materials have shown remarkable suitability as platforms towards the optical magnetic properties. However, practical use modulation should be both stable reversible and, particularly, it occur at room temperature. Here we show an unprecedented magnetism using low-intensity visible-light in Fe
Magneto-ionic gating, a procedure that enables the modulation of materials' magnetic properties by voltage-driven ion motion, offers alternative perspectives for emerging low-power storage and spintronic applications. Most previous studies in all-solid-state magneto-ionic systems have focused on control interfacial magnetism ultrathin (i.e., 1–3 nm) films, taking advantage an adjacent ionic conducting oxide, usually GdOx or HfOx, transports functional species (e.g., H+ O2−). Here, we report...
Abstract The switching dynamics of ferroelectric polarization under electric fields depends on the availability screening charges in order to stabilize switched polarization. In ferroelectrics, thin films with exposed surfaces investigated by piezoresponse force microscopy (PFM), main source external is atmosphere and water neck, therefore relative humidity (RH) plays a major role. Here, it shown how dynamic writing domains BaTiO 3 changes varying scanning speeds range RH between 2.5% 60%....
Rapid progress in information technologies has spurred the need for innovative memory concepts, which advanced data-processing methods and tailor-made materials are required. Here we introduce a previously unexplored nanoscale magnetic object: an analog vortex controlled by electric-field-induced ion motion, termed magneto-ionic or "vortion". This state arises from paramagnetic FeCoN through voltage gating gradual N3-ion extraction within patterned nanodots. Unlike traditional states,...
<title>Abstract</title> Understanding the mechanisms underlying a stable polarization at surface of ferroelectric thin films is particular importance both from fundamental point view and to achieve control itself. In this study, we demonstrate that X-ray standing wave technique allows profile film, as opposed average film polarity, be probed directly. The provides, with picometer accuracy, Ti Ba atomic positions near three differently strained BaTiO3 films. This gives direct access local...
Abstract Understanding the mechanisms underlying a stable polarization at surface of ferroelectric thin films is particular importance both from fundamental point view and to achieve control itself. In this study, we demonstrate that X-ray standing wave technique allows profile film, as opposed average film polarity, be probed directly. The provides Ti Ba atomic positions, along out-of-plane direction, near three differently strained $$\mathrm {BaTiO_3}$$ films. This gives direct access...
Abstract The polar discontinuity at any ferroelectric surface creates a depolarizing field that must be screened for the polarization to stable. In capacitors, screening is done by electrodes, while in bare surfaces it typically accomplished atmospheric adsorbates. Although chemisorbed species can have even better efficiency than conventional they are subject unpredictable environmental fluctuations and, moreover, dominant charged favor one polarity over opposite. This paper proposes new...
Porous FeMn alloys with additions of 0, 1, 3 and 5 wt.% Ag were fabricated using powder metallurgy sintering. The microstructure the was characterized X-ray diffraction, transmission electron microscopy selected area diffraction. While equiatomic FeMn-1Ag possess a fully austenitic structure, change in crystallographic structure is observed upon addition Ag, where mixture γ austenite ε martensite phases observed. Compression tests reveal that such structural transition causes an increase...
A series of MgxFe3-xO₄ (x ═ 0-1) nanoparticles was synthesized in order to prepare novel MgxFe3-xO₄/glassy carbon modified electrodes. Effects magnesium content (x) on the analytical performance electrodes detection gallic acid were evaluated. It found that concentration and crystallite/particle size prepared play significant roles sensing properties The increase up value x 0.4 paste accompanied by an corresponding oxidation current acid. However, further growth caused decline obtained...
Understanding the mechanisms underlying a stable polarization at surface of ferroelectric thin films is particular importance both from fundamental point view and to achieve control itself. In this study, it demonstrated that X-ray standing wave technique allows near film be probed directly. The employed determine, with picometer accuracy, Ti Ba atomic positions three differently strained $\mathrm{BaTiO_3}$ grown on scandate substrates, $\mathrm{SrRuO_3}$ as bottom electrode. This gives...
Ferroelectric Thin Film-Based Memories In article number 2100650, Gustau Catalan, Neus Domingo, and co-workers demonstrate that the maximum speed at which ferroelectric thin film-based memories can be written accelerates with atmospheric humidity – and, conversely, slows down in dry conditions. The domain width as a function of relative follows behavior water adsorption isotherm, revealing interplay between layer thickness screening. Image by Damaso Torres, ICN2.