Abstract:
A complex oxide of the Y22Mn2/32/3Re4/34/3O77 composition with pyrochlore-like structure and parameters of hexagonal unit cell α=14.91(1)α=14.91(1) Å, c=17.53(1)c=17.53(1) Å 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)χ=C/(T−θ), with C=2.07C=2.07cm3⋅3⋅K/mol−1−1 and θ=−160θ=−160 K, and the effective magnetic moment corresponding to the cationic combination Mn2+2+-Re5+5+. The data obtained allow one to assume that the compound has a noncollinear antiferromagnetic structure
Citation:
G. V. Bazuev, T. I. Chupakhina, V. N. Krasil'nikov, “Synthesis of a new magnetic Y22Mn2/32/3Re4/34/3O77 with pyrochlore-like structure”, Pis'ma v Zh. Èksper. Teoret. Fiz., 74:7 (2001), 440–442; JETP Letters, 74:7 (2001), 401–403