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- W2352204472 abstract "Compounds of the layered transition-metal-sulfide series $mathrm{Ba}{mathrm{Co}}_{1ensuremath{-}x}{mathrm{Cu}}_{x}{mathrm{S}}_{2}$ $(0ensuremath{leqslant}xensuremath{leqslant}0.5)$ were prepared, and structural, electrical, and magnetic properties were investigated. The semiconductor $mathrm{Ba}mathrm{Co}{mathrm{S}}_{2}$ is antiferromagnetically ordered below $310phantom{rule{0.3em}{0ex}}mathrm{K}$. With increasing Cu content $x$ the structure becomes more anisotropic as the lattice parameter perpendicular to the layers elongates while the parallel parameter contracts. The resistivity is nonmetallic for all the compounds in this series. The N'eel temperature ${T}_{N}$ decreases with $x$, reaching ${T}_{N}ensuremath{approx}0$ by $xensuremath{approx}0.2$. The susceptibility in the high-temperature paramagnetic phase, which for $mathrm{Ba}mathrm{Co}{mathrm{S}}_{2}$ is consistent with ${mathrm{Co}}^{2+}$ ions in the low-spin $S=1∕2$ state, shows a Curie constant that is very much smaller than expected for ${mathrm{Cu}}^{1+}$ and a mixture of ${mathrm{Co}}^{2+}$ and ${mathrm{Co}}^{3+}$ in the ratio of $1--2x$ to $x$. At sufficiently low temperatures there is a spin-glass phase for all $x>0$. The magnetic phase diagram obtained is remarkably similar to that of normal state ${mathrm{La}}_{2ensuremath{-}x}{mathrm{Sr}}_{x}mathrm{Cu}{mathrm{O}}_{4}$ $(xensuremath{leqslant}0.06)$." @default.
- W2352204472 created "2016-06-24" @default.
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- W2352204472 date "2006-03-20" @default.
- W2352204472 modified "2023-09-23" @default.
- W2352204472 title "Structural, electrical, and magnetic properties ofBaCo1−xCuxS2" @default.
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- W2352204472 doi "https://doi.org/10.1103/physrevb.73.104426" @default.
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