ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Preparation and Physical Properties of CuAl1-xMnxO2 (0 ≤ x ≤ 0.2) Delafossites. -The title solid solutions are synthesized by solid state reactions of stoichiometric mixtures of Cu, CuO, Al2O3, and Mn2O3 (pressed pellets; evacuated silica tubes, 1020°C) and characterized by powder XRD, electrical conductivity, and magnetic susceptibility measurements. They crystallize with the 3R delafossite structure in the hexagonal space group R3m. The Mn 3+ ions are in the high-spin state and the predominant interactions are antiferromagnetic. The solid solutions are semiconductors with an activation energy decreasing with x. -(TOEPFER*, J.; TRARI, M.; DOUMERC, J.-P.; Solid State Sci. 9 (2007) 3-4, 236-239;
Magnetic properties
Magnetic properties D 9000Structure, Nonstoichiometry and Magnetic Properties of the Perovskites Sr1-xCaxMnO3-δ. -The structural, thermal, and magnetic properties of the series of title compounds (0 ≤ x ≤ 1) are characterized as a function of nonstoichiometry δ by XRD, thermal analysis, and magnetic measurements. A cubic to hexagonal phase transformation of the Sr-rich samples is accompanied by a large expansion of the lattice that is reduced by Ca substitution. The Ca/Sr-manganites are antiferromagnets with TN = 170 K for x = 0.5 and δ = 0.02, and TN = 120 K for x = 1 and δ = 0.05. -(TOEPFER*, J.; PIPPARDT, U.; VOIGT, I.; KIEGEL, R.; Solid State Sci. 6 (2004) 7, 647-654; FB Werkstofftech.,
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
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