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Abstract
Langmuir-Blodgett (LB) films of copolymer with ferrocenyl-methyl- acrylate(FcMA) and N-dodecyl-acrylamide(DDA) were fabricated. The FcMA moiety is supposed to enter into the alkyl chains of DDA and be arranged two- dimensionally form the X-ray diffraction analysis. The magnetization curve showed a steep rise up to several kOe and a gentle increase with the magnetic field up to 55 kOe. This behavior seems to be ferromagnetic. Even more than room temperature, the half of the magnetic moment at 4.5K remained, and the magnetization curve showed ferromagnetic. Furthermore, this LB film had a magnetic anisotropy depending on the dipping direction. On the other hand, the magnetization curves for the powder and the cast film of the copolymer were paramagnetic. The magnetic moment of the LB film is about 30 times larger than those of the powder and the cast film. These results indicate that a configurational interaction is important to explain the enhancement of magnetic moment of this copolymer.