Mechanical & Materials Engineering, Department of


Date of this Version



Published in Polymer 54:2 (January 24, 2013), pp. 490–494; doi: 10.1016/j.polymer.2012.12.024


Copyright © 2012 Elsevier Ltd. Used by permission.


Pronounced ferromagnetism was observed in a crystalline blend film of conjugated polymer poly(3-hexylthiophene) (P3HT) and phenyl-C61-butyric acid methyl ester (PCBM) by using magnetic force microscopy measurements. A substantial room-temperature saturation magnetization of about 0.65 emu g−1 was measured by an alternating gradient field magnetometer. Multiple experimental evidences demonstrate the charge transfer from the P3HT to the PCBM and the formation of P3HT crystal domain are expected to be two critical factors for the originals of room-temperature organic ferromagnetism.