Shalinee Chikara

Partial antiferromagnetism in spin-chain Sr5Rh4O12, Ca5Ir3O12, and Ca4IrO6 single crystals

We report a structural, thermodynamic and transport study of the newly synthesized Sr5Rh4O12, Ca5Ir3O12 and Ca4IrO6 single crystals. These quasi-one-dimensional insulators consist of a triangular lattice of spin chains running along the c-axis, and are commonly characterized by a partial antiferromagnetic (AFM) order, a small entropy removal associated with the phase transitions and a sizable low-temperature specific heat linearly proportional to temperature. Sr5Rh4O12 is defined by an AFM order below 23 K with strong evidence for an Ising character and two step-like transitions in isothermal magnetization leading to a ferrimagnetic state at 2.4 T and a ferromagnetic state at 4.8 T, respectively. Ca5Ir3O12 and Ca4IrO6 are also antiferromagnetically ordered below 7.8 K and 12 K, respectively, and show an unusually large ratio of the Curie-Weiss temperature to the Neel temperature. In particular, Ca5Ir3O12, which includes both Ir4+ and Ir5+ ions, reveals that only S=1/2 spins of the Ir4+ ions are involved in the magnetic ordering whereas S=3/2 spins of the Ir5+ ions remain disordered. All results suggest the presence of the geometrical frustration that causes incomplete long-range AFM order in these quasi-one-dimensional compounds.

Electric polarization observed in single crystals of multiferroic Lu2MnCoO6

\mathrm{S}{\mathrm{r}}_{2}\mathrm{Ir}{\mathrm{O}}_{4}

Pressure-induced insulating state in Ba1-xRxIrO3 (R = Gd, Eu) single crystals

is a spin-orbit-coupled insulator with an antiferromagnetic (AFM) transition at

Anomalous itinerant magnetism in single-crystal Sr4Ru3O10 : A thermodynamic and transport investigation

{T}_{N}=240\phantom{\rule{0.16em}{0ex}}\mathrm{K}

Charge partitioning and anomalous hole doping in Rh-doped Sr2IrO4

. We report results of a comprehensive study of single-crystal

Fermi-surface topologies and low-temperature phases of the filled skutterudite compounds CeOs4Sb12 and NdOs4Sb12

\mathrm{S}{\mathrm{r}}_{2}\mathrm{I}{\mathrm{r}}_{1\ensuremath{-}x}\mathrm{T}{\mathrm{b}}_{x}{\mathrm{O}}_{4}\phantom{\rule{0.16em}{0ex}}(0\ensuremath{\le}x\ensuremath{\le}0.03)

Giant magnetoelectric effect in theJeff=12Mott insulatorSr2IrO4

. This study found that a mere 3%

Highly anisotropic magnetism in Cr-doped perovskite ruthenates

(x=0.03)

Observation of Strong Spin Valve Effect in Bulk Ca3(Ru1-xCrx)2O7

of tetravalent