Abstract
Abstract The crystal structure of the newly discovered compound Ce3MnBi5 was determined from X-ray single crystal diffraction data. The space group is P63/mcm with the lattice parameters a=9.627(3), c=6.456(1) A. The compound crystallizes in the Ga4Ti5 structure type. There are no isostructural compounds in ternary systems with Sb and Pb substituted for Bi. The Ce3MnBi5 remains paramagnetic down to ∼4.2 K, even though the paramagnetic Curie temperature (θp=−53 K) suggests an antiferromagnetic ground state. The value of effective magnetic moment (ρeff=5.85 μB) per formula unit could be accounted for by two different electronic configurations of Ce and Mn atoms: 3Ce3+ and 1Mn4+ or 3Ce4+ and 1Mn2+. Bond distances arguments favor the first possibility. Magnetization measurements at 5 K indicate two metamagnetic (field-induced) transitions at ∼1.3 and ∼5 T, which we believe are due to impurities in the sample.
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