Abstract
A complex oxide of the Y2Mn2/3Re4/3O7 composition with pyrochlore-like structure and parameters of hexagonal unit cell a=14.91(1) A c=17.53(1) A was synthesized. The magnetic susceptibility and magnetization measurements showed that below 190 K this oxide possesses spontaneous magnetic moment. In the paramegnetic region, the magnetic susceptibility obeys the Curie-Weiss law χ=C/(T−Θ), with C=2.07 cm3 K mol−1 and Θ=−160 K, and the effective magnetic moment corresponding to the cationic combination Mn2+-Re5+. The data obtained allow one to assume that the compound has a noncollinear antiferromagnetic structure.
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