Magnetic properties on an organic ferrimagnetic compound and related materials

Search for an organic ferrimagnet has been one of the challenging targets in the field of material science. Recently, we have reported the successful results for the crystals of a novel organic triradical of 2-[3′,5′-bis(N-tert-butylaminoxyl)phenyl]-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazol-1-oxyl-3-oxide (PNNBNO). This is the first example of a genuine organic ferrimagnetic material having well-defined chemical and crystal structure with TC=0.28 K. The properties of PNNBNO are described and the magnetic interactions of this system are discussed in comparison with the related oligoaminoxyl radicals.