Magnetism of Higher Borides

Magnetism of borides which contain the B 12 icosahedra as a structural building block are attracting increasing interest since they exhibit unexpectedly strong magnetic interactions, despite being magnetically dilute f -electron insulators.The magnetic behavior among the different compounds has also been found to be diverse.The f -electron dependence of magnetic B 12 icosahedra borides is compared, and found to be different from conventional mechanisms.The TbB25 system is also investigated further and the transition is assigned to a typical antiferromagnetic transition.