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Spatially Resolved Observation of Ferroelectric‐to‐Paraelectric Phase Transition in a Two‐Dimensional Halide Perovskite

open access: yesAdvanced Materials, EarlyView.
Temperature‐dependent nanoscale ferroelectric domain evolution and the ferroelectric‐to‐paraelectric phase transition in 2D halide perovskites is visualized using piezoresponse force microscopy. The phase transition initiates locally below the Curie temperature and progressively propagates as paraelectric regions expand.
Tae Hyun Jung   +14 more
wiley   +1 more source

Multi‐Scale Modeling of a 3D Soft Magnetoelectric Patch for Wireless Nerve Stimulation

open access: yesAdvanced Materials Interfaces, EarlyView.
Core‐shell, magnetoelectric nanoparticles (MENPs) can serve as wireless electric nano‐sources, thanks to their ability to generate high levels of electricity, when stimulated by a human‐safe external magnetic field. By combining MENPs with soft, biocompatible polymeric matrices and optimizing its composite configuration and electrical behavior via ...
Giulia Suarato   +6 more
wiley   +1 more source

Heating Simulation of Film Heaters Fabricated by EHD Inkjet Printing for Satellite Applications

open access: yesAdvanced Materials Interfaces, EarlyView.
New processes utilizing next‐generation printing technology are proposed to manufacture film heaters for satellite applications. In addition, the material properties of composite inks produced for application to this printing technology are derived. Film heaters are manufactured using the inks produced in this way, and heater verification is performed ...
Ju‐Hun Ahn   +2 more
wiley   +1 more source

Room Temperature Dy Spin‐Flop Switching in Strained DyFeO3 Thin Films

open access: yesAdvanced Materials Interfaces, EarlyView.
The two‐spin system DyFeO3, a canted bulk antiferromagnet with a spin reorientation between 40 and 50 K is epitaxially grown as thin film with compressive in‐plane strain. As a result, the spin reorientation increased by more than 20 K and a sign‐dependent linear M(T) dependence between 100 and 400 K is measured due to an induced alignment of Dy spins.
Banani Biswas   +5 more
wiley   +1 more source

Large Photoinduced Tuning of Ferroelectricity in Sliding Ferroelectrics

open access: yesPhysical Review Letters
Stacking nonpolar, monolayer materials has emerged as an effective strategy to harvest ferroelectricity in two-dimensional (2D) van de Waals (vdW) materials. At a particular stacking sequence, interlayer charge transfer allows for the generation of out-of-plane dipole components, and the polarization magnitude and direction can be altered by an ...
Lingyuan Gao, Laurent Bellaiche
openaire   +2 more sources

Subsurface State Bilayer in Tetragonal Ferroelectric BaTiO3

open access: yesAdvanced Materials Interfaces, EarlyView.
The subsurface Ba2+disorder, reveals the pairs of O vacancies (VO++$V_O^{ + + }$ s) and small polarons (SPe‐SPe−$SP_e^ - $ s) (Figure a–b), with the charge balance, as the following: Ti3++[VO+++SPe−]pair↔Ti4+${{T}_i}^{3 + } + {{[V_O^{ + + } + SP_e^ - ]}_{pair}} \leftrightarrow T_i^{4 + }$ which is consistent with observed low‐energy electron ...
Junhao Chen   +12 more
wiley   +1 more source

Self‐Recovery of Carbonate‐Contaminated Strontium Titanate (100) Vicinal Surfaces Imaged by Tip‐Enhanced Raman Spectroscopy

open access: yesAdvanced Materials Interfaces, EarlyView.
Strontium titanate, a widely used perovskite material, undergoes changes in surface properties under CO2 adsorption. This study demonstrates a self‐regeneration process where strontium carbonate gradually delaminates, leaving a TiO2 termination. The findings, supported by optical near‐field spectroscopy and density functional theory, have broad ...
Mohammad Bakhtbidar   +5 more
wiley   +1 more source

Organic Ferroelectric Synaptic Transistors for Neural Image Recognition Networks

open access: yesAdvanced Materials Interfaces, EarlyView.
All organic transistors, where both the dielectric and semiconducting layers are polymeric, are developed as electrical synaptic devices. Two copolymers of PVDF as the dielectric layer with large differences in their saturation polarizability and memory window are chosen.
Evan Restuccia   +2 more
wiley   +1 more source

Interlayer‐Mediated Stabilization of Metastable P63cm ScFeO3 on Al2O3

open access: yesAdvanced Materials Interfaces, EarlyView.
This work develops an interlayer‐mediated stabilization method, demonstrated by the deposition of the P63cm phase of ScFeO3 ‐a metastable polymorph that exhibits multiferroic and optical properties not possible in the ground state. Thin films of the P63cm phase of ScFeO3 are stabilized on (0001) Al2O3 by the spontaneous formation of two atomic layers ...
Marshall B. Frye   +4 more
wiley   +1 more source

The Rise of Refractory Transition‐Metal Nitride Films for Advanced Electronics and Plasmonics

open access: yesAdvanced Materials Interfaces, EarlyView.
Transition‐metal nitrides (TMNs) are exceptional materials with high stability, biocompatibility, and semiconductor integration, which have been extensively employed in various fields. However, the epitaxial growth of TMN films remains a challenge. The absence of high‐quality TMNs limits the understanding of their condensed matter physics and hinders ...
Jiachang Bi   +3 more
wiley   +1 more source

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