Publications related to Structural phase transition in NH₄F under extreme pressure conditions

Related publications (17)

Phase formation and texture evolution in 316L-CuCrZr multi-material structures fabricated by laser powder bed fusion

Christian Leinenbach, Johann Michler, Antonios Nikolaos Baganis

Steel-copper multi-material structures produced via Additive Manufacturing pose challenges in laser co-processing and microstructural control. This work employs neutron imaging, Electron Backscatter Diffraction (EBSD), and Energy Dispersive Spectroscopy (E ...

2025

Observation of plastic ice VII by quasi-elastic neutron scattering

Richard Gaal, Livia Eleonora Bove Kado, Maria Rescigno

Water is the third most abundant molecule in the universe and a key component in the interiors of icy moons, giant planets and Uranus- and Neptune-like exoplanets1, 2–3. Owing to its distinct molecular structure and flexible hydrogen bonds that readily ada ...

2025

Synthesis and characterization of low-dimensional organic-inorganic perovskites for detection and photovoltaic applications

Colin Jeanguenat

Low-dimensional perovskite such as layered halide perovskite and perovskite nanocrystals have attracted attention in the past decade. These materials have impressive optoelectronic properties such as high photoluminescence and improved stability relative t ...

EPFL2025

N2O Activation and NO Adsorption Control the Simultaneous Conversion of N2O and NO Using NH3 over Fe-ZSM-5

Oliver Kröcher, Filippo Buttignol

Fe-exchanged zeolites are heterogeneous catalysts that can potentially ensure simultaneous conversion of nitrous oxide (N2O) and nitric oxide (NO) using ammonia (NH3) as a selective reducing agent through their selective catalytic reduction reaction (N2O-N ...

AMER CHEMICAL SOC2025

Superconductivity in nickelate and cuprate superconductors with strong bilayer coupling

Bruce Normand

The discovery of superconductivity at 80 K under high pressure in La3Ni2O7 3 Ni 2 O 7 presents the groundbreaking confirmation that high-Tc T c superconductivity is a property of strongly correlated materials beyond cuprates. We use density functional theo ...

AMER PHYSICAL SOC2024

Meta-Substituted Asymmetric Azobenzenes: Insights into Structure-Property Relationship

Tatiana Antonova Pachova, Giuseppe Sforazzini

This article presents a comprehensive investigation into the functionalization of methoxyphenylazobenzene using electron-directing groups located at the meta position relative to the azo group. Spectroscopic analysis of meta-functionalized azobenzenes reve ...

MDPI2024

Characterizing the diffuse continuum excitations in the classical spin liquid h-YMnO3

Jakob Lass

We extend previous inelastic neutron scattering results on the geometrically frustrated antiferromagnet hexagonal-YMnO3, 3 , which has been suggested to belong to the class of classical spin liquids. We expand the energy transfer range of the diffuse signa ...

AMER PHYSICAL SOC2024

Oxygen isotope fractionation during amorphous to crystalline calcium carbonate transformation at varying relative humidity and temperature

Anders Meibom, Arthur Adams

Crystalline calcium carbonate isotope compositions have been widely used to reconstruct past environments. However, if their isotopic compositions are modified because of crystallization from an amorphous precursor, their reliability as paleo-geochemical p ...

Elsevier BV2024

The BPHZ Theorem for Regularity Structures via the Spectral Gap Inequality

Martin Hairer

We provide a relatively compact proof of the BPHZ theorem for regularity structures of decorated trees in the case where the driving noise satisfies a suitable spectral gap property, as in the Gaussian case. This is inspired by the recent work (Linares et ...

Springer2024

Observation of a Plastic Crystal in Water-Ammonia Mixtures under High Pressure and Temperature

Livia Eleonora Bove Kado

Solid mixtures of ammonia and water, the so-called ammonia hydrates, are thought to be major components of solar and extra-solar icy planets. We present here a thorough characterization of the recently reported high pressure (P)-temperature (T) phase VII o ...

AMER CHEMICAL SOC2023

Synthesis and crystal structure of Fe[SeO4]OH and prediction of polytypes in the extended R[MO4]Z family

Arnaud Magrez, Alla Arakcheeva, Wen Hua Bi, Benoît Guilhem Michel Binh Truc

Single crystals of Fe[SeO4]OH have been synthesized by hydrothermal treatment. The Fe[SeO4]OH structure was investigated using the superspace approach. It is shown that the structure belongs to a family of compounds including kieserite-like and pauflerite- ...

ROYAL SOC CHEMISTRY2023

Atomistic simulation of martensite microstructural evolution during temperature driven beta -> alpha transition in pure titanium

Carolina Baruffi

Titanium and its alloys undergo temperature-driven martensitic phase transformation leading to the development of complex microstructures at mesoscale. Optimizing the mechanical properties of these materials requires an understanding of the correlations be ...

2022

Development of a Collisional Radiative Model for Hydrogen-Cesium Plasmas and Its Application to SPIDER

Basile Marie Jacques Pouradier Duteil

SPIDER is the full scale prototype for the ITER Heating Neutral Beam (HNB) source. The production of negative ions in the source mostly relies on the conversion of H/D atoms and positive ions on a 1.6 m x 0.8 m converter surface, which is covered with cesi ...

2022

Ba-5(IO6)(2): crystal structure evolution from room temperature to 80 K

Arnaud Magrez, Priya Ranjan Baral

The crystal structure of Ba-5(IO6)(2), pentabarium bis(orthoperiodate), has been re-investigated at room temperature based on single-crystal X-ray diffraction data. In comparison with a previous crystal structure determination by the Rietveld method, an im ...

2021

A critical assessment of experimental investigation of dynamic recrystallization of metallic materials

Roland Logé, Ke Huang

Dynamic recrystallization (DRX) often takes place during hot deformation of metallic materials, which then exerts significant influence on the final microstructures and mechanical properties of the formed components. A considerable number of published pape ...

2020

A High-Throughput Computational Study Driven by the AiiDA Materials Informatics Framework and the PAULING FILE as Reference Database

Nicola Marzari, Giovanni Pizzi, Nicolas Frank Mounet, Martin Uhrin

Confronted with the explosion of computing power and the vast quantities of materials data thus produced, Gray proposed in 2009 the “Fourth Paradigm of Science: Data-Intensive Discovery through Data Exploration (eScience)" [Gray, J. (2009). The Fourth Para ...

Wiley-VCH2019

Organic-inorganic hybrid perovskite CH3NH3PbI3: structural consequences of water absorption

László Forró, Endre Horvath, Alla Arakcheeva, Massimo Spina

IUCr/Wiley2016