Journal
PHYSICAL REVIEW LETTERS
Volume 84, Issue 8, Pages 1744-1747Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.84.1744
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The magnetism of activated carbon fibers composed of a disorder network of nanographites was investigated, where each nanographite has about 1 edge-inherited localized spin. The susceptibility, for samples situated around the metal-insulator threshold, shows a cusp around 4-7 K in addition to the presence of a field-cooling effect. These behaviors are explained in terms of disordered magnetism caused by random strengths of inter-nano-graphite antiferromagnetic interactions mediated by pi-conduction carriers.
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