Magnetic Ordering in an Organic Polymer

• DOI: 10.1126/science.1065477
• Publication Date: 2002-07-27T09:47:15Z
• Authors: Andrzej Rajca; Jirawat Wongsrira...; Suchada Rajca
• Keywords: Organic polymer

We describe preparation and magnetic properties of an organic pi-conjugated polymer with very large moment order at low temperatures. The is designed a density cross-links alternating connectivity radical modules unequal spin quantum numbers (S), macrocyclic S = 2 and, cross-linking (1/2) modules, which permits net values for either ferromagnetic or antiferromagnetic exchange couplings between the modules. In highly cross-linked polymer, effective corresponding to average about 5000 slow reorientation magnetization by small field (less than equal 1 oersted) below temperature 10 kelvin are found. Qualitatively, this behavior comparable that insulating glasses blocked superparamagnets.