Synthesis of Carbon Showing Weak Antiferromagnetic Behavior at a Low Temperature
Department of Materials Science, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan
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Condens. Matter 2019, 4(1), 33; https://doi.org/10.3390/condmat4010033
Received: 31 January 2019 / Revised: 13 March 2019 / Accepted: 19 March 2019 / Published: 21 March 2019
In this short communication, we report a new carbon material prepared from meta-linked polyaniline that exhibits weak antiferromagnetic interactions at low temperature. The synthesis of poly(meta-aniline), abbreviated as m-PANI, was conducted using the Ullmann reaction with the aid of Cu+ as a catalyst in the presence of K2CO3. After the generation of radical cations by vapor-phase doping with iodine, carbonization was performed to prepare carbon polyaniline (C-PANI), which comprises condensed benzene rings. Analysis with a superconducting quantum interference device revealed that the resultant carbon exhibits antiferromagnetism at low temperatures. The discovery of this weak antiferromagnetic carbon may contribute to the development of carbon magnets.
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Keywords:
polymer magnet; polyaniline; antiferromagnetism; superconducting quantum interference device
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MDPI and ACS Style
Otaki, M.; Hirokawa, S.; Goto, H. Synthesis of Carbon Showing Weak Antiferromagnetic Behavior at a Low Temperature. Condens. Matter 2019, 4, 33.
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