Abstract
Containerless processing, which enables a melt to be levitated in air, prevents the melt from crystallization at the boundary between the melt and a container wall. Accordingly, deeper undercooling can be realized. Metastable hexagonal Lu1－xScxFeO3 （0 ≤ x ≤ 0.8） were directly solidified from an undercooled melt by containerless processing with an aerodynamic levitation furnace. Synchrotron X-ray diffraction measurements revealed that the crystal structure of the hexagonal phase was isomorphous to hexagonal ferroelectric RMnO3 （R = rare earth ions） with a polar space group of P63cm. The weak ferromagnetic transition temperature increased from 150 K for x = 0 to 175 K for x = 0.7, which is the highest magnetic transition temperature among those of hexagonal RMnO3 and RFeO3.
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