Planar XY magnetic glass state in the GdScNbOpyrochlore.

Here a spin glass system with emergent planar ordered spin clusters is investigated. The mixed B-site pyrochlore GdScNbOhas been synthesized and characterized through a variety of techniques, including x-ray diffraction, magnetic susceptibility, muon spin relaxation, heat capacity and neutron scattering. Despite a Curie-Weiss temperature of -3.

Non-magnetic ion site disorder effects on the quantum magnetism of a spin-1/2 equilateral triangular lattice antiferromagnet.

With the motivation to study how non-magnetic ion site disorder affects the quantum magnetism of BaCoSbO, a spin-1/2 equilateral triangular lattice antiferromagnet, we performed DC and AC susceptibility, specific heat, elastic and inelastic neutron scattering measurements on single crystalline samples of BaSrCoSbOwith Sr doping on non-magnetic Baion sites. The results show that BaSrCoSbOexhibits (i) a two-step magnetic transition at 2.7 K and 3.

Valence tautomerism in a [2 × 2] Co grid complex containing a ditopic arylazo ligand.

We describe the structural and magnetic properties of a tetranuclear [2 × 2] Co4 grid complex containing a ditopic arylazo ligand. At low temperatures and in solution the complex is comprised of Co3+ and singly reduced trianion-radical ligands. In the solid state we demonstrate the presence of valence tautomerization via variable temperature magnetic susceptibility experiments and powder-pattern EPR spectroscopy.

Magnetic ordering in the Ising antiferromagnetic pyrochlore NdScNbO.

The question of structural disorder and its effects on magnetism is relevant to a number of spin liquid candidate materials. Although commonly thought of as a route to spin glass behaviour, here we describe a system in which the structural disorder results in long-range antiferromagnetic order due to local symmetry breaking. NdScNbOis shown to have a dispersionless gapped excitation observed in other neodymium pyrochlores below= 0.

Understanding the Interplay of Vacancy, Cation, and Charge Ordering in the Tunable ScVO Defect Fluorite System.

We report the synthesis, structure, and redox behavior of the cation-ordered tetragonal ScVO defect fluorite superstructure previously thought to be the oxygen precise ABO phase. Four synthesis routes in oxidative, reductive, and inert atmospheres are demonstrated. and powder X-ray and neutron diffraction analyses reveal vanadium disproportionation reactions.

Absence of magnetic ordering in the spin liquid candidate CaCuGeVO.

Typically, quantum spin liquid candidates can be found in materials with a combination of geometrical frustration along with low spin. Due to its spin of S  =  1/2 the copper (II) ion is often present in the discussion on spin liquid candidates. The solid state compound CaCuGeVO is a material that crystallizes in the garnet structure (s.

Evidence for the confinement of magnetic monopoles in quantum spin ice.

Magnetic monopoles are hypothesised elementary particles connected by Dirac strings that behave like infinitely thin solenoids (Dirac 1931 Proc. R. Soc.

Structure and Magnetic Properties of KRuO.

The crystal structure of KRuO is refined at both 280 and 3.5 K from neutron powder data, and magnetic properties are reported for the first time. The scheelite structure, I4/a, is confirmed at both temperatures.