Ferromagnetism of Organic Radical Crystals

Abstract

Recently, the transition to ferromagnetic order has been found in crystals of organic compounds not containing metallic elements. The progress of the research is reviewed starting from the initial stage of study to obtain the design strategies to induce ferromagnetic interaction in organic crystals to the discovery of ferromagnetism in p -nitrophenyl nitronyl nitroxide ( p -NPNN; C 13 H 16 N 3 O 4 ). The recent development in the field of molecular magnetism is also described.