Journal
CURRENT APPLIED PHYSICS
Volume 13, Issue 9, Pages 2055-2058Publisher
ELSEVIER
DOI: 10.1016/j.cap.2013.09.007
Keywords
Glassy carbon; Hydrothermal treatment; Room-temperature ferromagnetism; Raman spectroscopy
Funding
- National Research Foundation of Korea [NRF-2010-0027963, 2012034779, 20120 29495]
- Korea University Grant
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Extraordinary room-temperature ferromagnetism was observed in our hydrothermally treated glassy carbon systems, taken to comprise nearly graphitized regions. Strong correlation between the ferromagnetic response and the diamagnetic susceptibility, superposed together, suggests the ferromagnetic long-range order in the graphitic phase to be of itinerant nature. Besides, the graphitization process associated with the itinerant spins and the ferromagnetic order revealed a systematic correlation with the average graphitic cluster size. (C) 2013 Elsevier B.V. All rights reserved.
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