Known antiferronlagnetic nlaterials far out nwnber known ferronlagnetic and ferrinlagnetic nlaterials. More­ over, the antife rronlagnets display a wide variety of phase transitions in addition to the paranlagnetic to antiferro­ nlagnetic transition at the Neel point, that nlake thenl a rich source of infornlation about the relations hip between exchange interactions, structure, and phase trans...

Garnet-type Li7La3Zr2O12 (LLZO) is a solid electrolyte material with a low-conductivity tetragonal and a high-conductivity cubic phase. Using density-functional theory and variable cell shape molecular dynamics simulations, we show that the tetragonal phase stability is dependent on a simultaneous ordering of the Li ions on the Li sublattice and a volume-preserving tetragonal distortion that re...

Many materials processes are thermally activated, and a full understanding of the microscopic details often requires characterization on the nanoscale. In situ heating in the TEM is a powerful technique for observing temperature effects on the atomic scale. We use in situ TEM to study octahedral rotations, which play a key role in the strain-driven coupling of order parameters in multifunctiona...

Let Ψ : Z → Z be an affine-linear map, and Ψ̇ be its linear part. A famous and difficult open conjecture of Dickson predicts the distribution of prime points in the affine sublattice Ψ(Z) of Z. Assuming the Gowers Inverse conjecture GI(s) and the Möbius and nilsequences conjecture MN(s) for some finite s > 1, GreenTao [GT3] verified Dickson’s conjecture for Ψ of complexity s. Let Φ : Z → Z be an...

The thermodynamic and mechanical stabilities of the Al3Ti-Zn3Ti pseudobinary alloy system is investigated from first-principles through density-functional theory calculations within the generalized gradient approximation. Both supercells calculations and sublattice cluster expansion methods are used to demonstrate that the addition of Zn to the Al sublattice of Al3Ti stabilizes the cubic L12 st...

A combination of novel technological and fundamental physics prospects has sparked a huge interest in pure spin transport in magnets, starting with ferromagnets and spreading to antiferro- and ferrimagnets. We present a theoretical study of spin transport across a ferrimagnet-nonmagnetic conductor interface, when a magnetic eigenmode is driven into a coherent state. The obtained spin current ex...