Room-temperature ferromagnetism in graphitic petal arrays

Rout, Chandra Sekhar ; Kumar, Anurag ; Kumar, Nitesh ; Sundaresan, A. ; Fisher, Timothy S. (2011) Room-temperature ferromagnetism in graphitic petal arrays Nanoscale, 3 (3). p. 900. ISSN 2040-3364

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We report room-temperature ferromagnetism of graphitic petal arrays grown on Si substrates by microwave plasma chemical vapor deposition without catalyst. The samples have been characterized by Raman and X-ray photoelectron spectroscopy to confirm the absence of possible ferromagnetic impurities. The petals exhibit ferromagnetic hysteresis with saturation magnetization of ∼4.67 emu cm−3 and coercivity of ∼105 Oe at 300 K, comparable to the reported behavior of few-layer graphene. Upon O2annealing the saturation magnetization and coercivity decreased to 2.1 emu cm−3 and ∼75 Oe respectively. The origin of ferromagnetism is believed to arise from the edge defects and vacancies in the petals.

Item Type:Article
Source:Copyright of this article belongs to Royal Society of Chemistry.
ID Code:120066
Deposited On:22 Jun 2021 06:36
Last Modified:22 Jun 2021 06:36

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