  We report an experimental and computational study of magnetic and electronic
properties of the layered Ru(V) oxide SrRu2O6 (hexagonal, P-3 1m), which shows
antiferromagnetic order with a N\'eel temperature of 563(2) K, among the
highest for 4d oxides. Magnetic order occurs both within edge-shared octahedral
sheets and between layers and is accompanied by anisotropic thermal expansivity
that implies strong magnetoelastic coupling of Ru(V) centers. Electrical
transport measurements using focused ion beam induced deposited contacts on a
micron-scale crystallite as a function of temperature show p-type
semiconductivity. The calculated electronic structure using hybrid density
functional theory successfully accounts for the experimentally observed
magnetic and electronic structure and Monte Carlo simulations reveals how
strong intralayer as well as weaker interlayer interactions are a defining
feature of the high temperature magnetic order in the material.
