The synthesis and characterisation of ferromagnetic CaMn₂O ₄ nanowires

The synthesis of marokite CaMn₂O₄ nanowires using a hydrothermal method is reported. Transmission electron microscopy and electron diffraction measurements show that the nanowires are polycrystalline in nature with diameters between 10 and 20 nm and lengths ranging from approximately 100 to 500 nm. Most interestingly, in contrast with the bulk material, magnetization measurements show that these nanowires exhibit ferromagnetic ordering with a Curie temperature (T) of approximately 40 K.