Kailash M. Mogare

Incommensurate spin correlations in highly oxidized cobaltates La2-xSrxCoO4.

We observe quasi-static incommensurate magnetic peaks in neutron scattering experiments on layered cobalt oxides La2−xSrxCoO4 with high Co oxidation states that have been reported to be paramagnetic. This enables us to measure the magnetic excitations in this highly hole-doped incommensurate regime and compare our results with those found in the low-doped incommensurate regime that exhibit hourglass magnetic spectra. The hourglass shape of magnetic excitations completely disappears given a high Sr doping. Moreover, broad low-energy excitations are found, which are not centered at the incommensurate magnetic peak positions but around the quarter-integer values that are typically exhibited by excitations in the checkerboard charge ordered phase. Our findings suggest that the strong inter-site exchange interactions in the undoped islands are critical for the emergence of hourglass spectra in the incommensurate magnetic phases of La2−xSrxCoO4.

Weak orbital ordering of Ir t(2g) states in the double perovskite Sr2CeIrO6

The electronic and magnetic properties of monoclinic double perovskite Sr

Erratum: Sr{sub 2}CrOsO{sub 6}: End point of a spin-polarized metal-insulator transition by 5d band filling [Phys. Rev. B 75, 020404(R) (2007)]

_2

K{sub 2}NaOsO{sub 5.5} and K{sub 3}NaOs{sub 2}O{sub 9}: The first osmium perovskites containing alkali cations at the 'A' site

CeIrO

Sr{sub 2}CrOsO{sub 6}: End point of a spin-polarized metal-insulator transition by 5d band filling

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Syntheses, Crystal Structures and Magnetic Properties of Rb2RuO4 and K2RuO4

were examined based on both experiments and first-principles density functional theory calculations. From the calculations we conclude that low-spin-state Ir

Sr2CrOsO6 : End point of a spin-polarized metal-insulator transition by 5d band filling

^{4+}

Syntheses and Crystal Structures of Two Sodium Ruthenates: Na2RuO4 and Na2RuO3

(5

K3Na(RuO4)2 and Rb3Na(RuO4)2, two new ruthenates with glaserite structure

\textit{d}^5

Synthesis, Crystal Structure and Magnetic Properties of Na3OsO5

, S=