High-Curie temperature ferromagnetism

Torrance obtained a sample that showed ferromagnetic properties with a high Curie temperature by a reaction of 1,3,5-triaminobenzene with iodine under rather drastic conditions (Torrance et al., 1987). A charge-transfer complex of iodine with an aniline-black-type polymer [32], a heteroatom-containing analogue to [14 ] (Johannsen et al., 1989), may have been... 

C. High-Curie Temperature(T c) Ferromagnetism in Aggregates and Nanocrystalline Thin Films / 114... 

Co-Co nearest neighbours are found in the c-axis direction, leading to a strong ferromagnetic exchange interaction, characterised by a high Curie temperature ( 950 K) ... 

Curie-temperature of 292 K (18.9 °C). It is ferromagnetic. The only other lanthanide with a (rather) high Curie-temperature is terbium, which has a Curie temperature of 222 K (-51.1 °C). The other known values are below 87 K (-186 °C). In Table 3.13, the known Curie-temperatures of the lanthanides are given. 

Above a certain temperature, the Curie temperature, the ferromagnetic properties are lost Cobalt is a ferromagnetic metal with a remarkably high Curie temperature as can be seen from Table 30.3. 

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