Abstract
Single crystals of cubic and tetragonal spinel Co3−xMnxO4 (x=1.0 and 1.5) were successfully grown using a solvent evaporation method with PbF2 flux. Single crystals in octahedral shape with a size of about 4mm on edge were obtained from 100cm3 Pt crucibles. Ferrimagnetic transitions were detected at 170K and 160K from the measurements of temperature dependent magnetization and specific heat of Co2MnO4 and Co1.5Mn1.5O4, respectively. Low temperature field-dependent magnetization curves give a strong indication of the non-collinear spin structure, offering an insulating Co3−xMnxO4 system as a possible candidate for examining the multiferroicity.
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