New organic ferromagnet of pyrolysed polyvinylchloride
Abstract
After the first report of the organic ferromagnet (poly-BIPO) quite a number of works devoted to a ferromagnetism in organic substances has appeared (see the review articles). At present the intensive search are being carried on of new organic ferromagnets with the high saturation magnetization. Here we first report of obtaining the new organic ferromagnet by the pyrolysis of a polyvinylchloride (PVCH). A technical PVCH (-CH <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> CHCH1-) <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">n</sub> , having the molecular mass of about I.2xIO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">5</sub> was used for pyrolysis in vacuo. The temperature in- crease was realized in the descrete steps on IOOK with the delay of I h on each reached value. The obtained product was crushed by the ultrasonic disperser into a powder with the average grain size of about 80 μm. The ferromagnetic phase formation versus the PVCH pyrolysis temperature (T <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">p</sub> ) was studied by two independent methods such as the electronic spin resonance (ESR) and the vibromagnetometer.