Periodic Trends in M-Fe Interactions across an Isostructural and Isoelectronic Series of [MFeS] Clusters (M = V, Cr, Mo, W).

The Mo nitrogenase is more efficient for N reduction than the alternative nitrogenases for reasons that are not fully understood. A set of related hypotheses center on the Mo ion facilitating electron delocalization, which could aid in substrate activation and/or provide enhanced stability during turnover, among other possibilities. To understand how the incorporation of Mo or other 'heterometals' influences the electronic structures of Fe-S clusters, we prepared and characterized an isostructural and isoelectronic series of [MFeS] clusters (M = V, Cr, Mo, W) that includes the first example of a [CrFeS] cluster.

Production of Anisotropic NdFeB Permanent Magnets with In Situ Magnetic Particle Alignment Using Powder Extrusion.

This study investigates the sustainable production of NdFeB permanent magnets using powder extrusion molding (PEM) with in situ magnetic alignment, utilizing recycled powder from an end-of-life (Eol) wind turbine magnet obtained via hydrogen processing of magnetic scrap (HPMS). Finite Element Method (FEM) simulations were conducted to design and optimize alignment tool geometries and magnetic field parameters. A key challenge in the PEM process is achieving effective particle alignment while the continuous strand moves through the magnetic field during extrusion.

Tailoring the energy landscape of a bloch point domain wall with curvature.

Topological defects, or singularities, play a key role in the statics and dynamics of complex systems. In magnetism, Bloch point singularities represent point defects that mediate the nucleation of textures such as skyrmions and hopfions. While these textures are typically stabilised in chiral magnets, the influence of chirality and symmetry breaking on Bloch point singularities remains relatively unexplored.

Nonreciprocal Spin Waves in Nanoscale Hybrid Néel-Bloch-Néel Domain Walls Detected by Scanning X-Ray Microscopy in Perpendicular Magnetic Anisotropic Fe/Gd Multilayers.

Spin wave nonreciprocity is crucial for signal processing in magnonic circuits. Domain walls (DWs) have been suggested as channels for nonreciprocal spin waves (magnons) with directional-dependent properties. However, the experimental investigations are challenging due to the low-damping magnetic material with DWs demanded and the nanoscale length scales involved.

Virtual experiments in computational magnetism with mag2exp.

We have designed and implemented the Python package mag2exp, which enables researchers to perform a range of virtual experiments given a spatially resolved vector field for the magnetization, a typical result from computational methods to simulate magnetism such as micromagnetics. This software allows experimental measurements such as magnetometry, microscopy, and reciprocal space based techniques to be simulated in order to obtain observables that are comparable to those of the corresponding experimental measurement. Such virtual experiments tend to be more economic to carry out than actual experiments.