Synthesis and magnetic characterisation of fullerene derivative based ferromagnets 1-(3-nitro)- and 1-(3-aminophenyl)-1H-methanofullerene doped with cobaltocene Original Research Article

A systematic study of the synthesis conditions in correalation with low-temperature magnetic properties is reported in 1-(3-aminophenyl)-1H-methanofullerene(C60)-(Cp2Co) (APhCo) and 1-(3-nitrophenyl)-1H-methanofullerene(C60)-(Cp2Co) (NiPhCo), with a Curie temperature of Tc=15 K; the latter is a newly discovered fullerene ferromagnet. The crystallisation conditions are found to play a critical role in determining the low-temperature ferromagnetic properties of these fullerene charge-transfer ferromagnets.