Showing 24 results for Author: Duncan H. Moseley
Aug, 2026
ORNL Report
The automated particle analysis (APA) method of scanning electron microscopy (SEM) energy dispersive X-ray spectroscopy (EDS/EDX) is a useful tool for analyzing the elemental and morphological data of particulate samples. Often, such datasets have many thousands of particles, and it can be difficult to sift through the data to find meaningful trends. EDXplorer is a softwar…
Jul, 2026
Journal
In this work, we evaluated the ability of single-particle inductively coupled plasma time-of-flight mass spectrometry (SP-ICP-TOF-MS) to characterize particulates generated from 300 series stainless steels and oxide dispersion–strengthened (ODS) steels. Particulates were produced using two different rotary tools (cutting disk and grinding bit) to assess the influence of pa…
Feb, 2026
Journal
Although oxidation mechanisms have been exhaustively studied for graphite, similar analyses of carbon fibers are comparatively sparse. Most prior work has focused on quantifying weight loss or assessing protective surface coatings designed to slow oxidation. The use of optical spectroscopic techniques for oxidation analyses is comparatively unexplored, but such techniques…
Nov, 2025
Journal
Elemental iridium presents surprising challenges for both inelastic neutron scattering (INS) and theoretical thermal transport calculations due to its high neutron absorption cross-section and strong electron-phonon interactions, respectively. Here, we overcome these challenges to measure temperature-dependent phonon dispersion curves, compare these with calculations based…
Oct, 2025
ORNL Report
Oct, 2025
Journal
Uranium-based intermetallic Laves phases (UM$_2$) provide valuable insight into the interplay of 5f electron hybridization and magnetic properties. However, ferromagnetism in these compounds is rare. UFe$_2$ is a cubic C15 Laves phase with largest Curie temperature ($T_C$) of all such compounds, at 162 K. In this study, we report the synthesis and characterization of a nov…
Aug, 2025
Journal
Recent computational work evaluated the phase stability of UCo2 and UNi2 in the C14, C15, and C36 Laves phases and reported their computationally determined phonon density of states. To corroborate these computational findings, we report the experimentally determined phonon density of states for UCo2 and UNi2 using inelastic neutron scattering at the wide angular-range cho…
Aug, 2024
Journal
The field of spintronics has seen a surge of interest in altermagnetism due to novel predictions and many possible applications. MnTe is a leading altermagnetic candidate that is of significant interest across spintronics due to its layered antiferromagnetic structure, high Neel temperature (TN ≈ 310 K) and semiconducting properties. The results on molecular beam epitaxy (…
Jul, 2024
Journal
Manganese telluride (MnTe) is a prospective platform for ultrafast carrier dynamics, spin-based thermoelectrics, and magnon-drag transport due to its unique electronic and magnetic properties. We use inelastic neutron scattering to study both pure and lithium-doped MnTe, focusing on the influence of doping in opening a magnon gap. We use neutron powder diffraction to deter…
Nov, 2023
Journal
α-Sb2O3 (senarmontite), β-Sb2O3 (valentinite), and α-TeO2 (paratellurite) are compounds with pronounced stereochemically active Sb and Te lone pairs. The vibrational and lattice properties of each have been previously studied but often lead to incomplete or unreliable results due to modes being inactive in infrared or Raman spectroscopy. Here, we present a study of the rel…