Synthesis, characterization and magnetic properties of complex oxides Ln2Mn2/3Re4/3O7 (Ln = Er, Y) and Y2Zn2/3Re4/3O7

Complex oxides Ln2Mn2/3Re4/3O7 (Ln = Y, Er) and Y2Zn2/3Re4/3O7 with a zirkelite structure and hexagonal unit cells (space group P3121, z = 6) have been obtained. Static and dynamic magnetic susceptibility measurements show that these oxides possess spin-glass behavior at low temperatures. Valence combinations of d-metals in the oxides are Mn2+(Zn2+)–Re5+. It is supposed that the examined specimens Ln2Mn2/3Re4/3O7 (Ln = Y, Er) contain the second magnetic phase of an unknown composition.