Magnetism of purified amorphous carbon
Lappeenranta University of Technology, School of Engineering Science, 53850 Lappeenranta, Finland
2 Saint-Petersburg State Electrotechnical University “LETI”, 197376 Saint-Petersburg, Russia
3 Saint-Petersburg State University, Research Park, 199034 Saint-Petersburg, Russia
4 JSC Polymetal Engineering, Hydrometallurgical Department, 198216 Saint-Petersburg, Russia
* Corresponding author: KomlevAnton@hotmail.com
Published online: 4 July 2018
In this work, magnetic properties of activated carbon coal, which is also named amorphous carbon, were investigated. Composition and structure analysis was performed by XRD, SEM and EDS techniques. Position and width of peaks on XRD pattern confirmed amorphous structure of coals with small degree of graphitization. Magnetic measurements were performed by SQUID magnetometer. According to thermomagnetic measurements, in part of the samples, antiferromagnetic transition was observed near 120 K. Nature of such phenomena, as well as effect of oxygen and magnetic contaminations on thermomagnetic measurements are discussed referring to similar results from previous researches and data from literature.
© The Authors, published by EDP Sciences, 2018
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