High superconducting transition temperatures of new rare earth ternary borides

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RESUMO

A new group of ternary borides has been found that show either ferromagnetism or superconductivity. Their general formula is MRh4B4 where M is a transition or rare-earth element. Their superconducting transition temperatures range from approximately 2.5 K for the Sm compound to approximately 12 K for the Lu compound.

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