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Magnetism in graphite induced by irradiation of hydrogen and helium atoms: a comparative study
Umeå University, Faculty of Science and Technology, Department of Physics. (Fysik)
Umeå University, Faculty of Science and Technology, Department of Physics. (Fysik)
2010 (English)In: Physica status solidi. B, Basic research, ISSN 0370-1972, E-ISSN 1521-3951, Vol. 247, no 11-12, 2988-2991 p.Article in journal (Refereed) Published
Abstract [en]

To identify the origin of defect-induced magnetism in ion-irradiated graphite, a comparative study of samples of graphite irradiated with hydrogen H+ and helium He+ ions is performed. Directionally dependent magnetic properties, atomic/magnetic force microscopy studies suggest that the induced magnetic moments are located along the vertically aligned grain boundaries. Compared to the case of the hydrogen ion irradiation, the optimal helium irradiation dose is an order of magnitude lower. From this we conclude that the hydrogen chemistry is essentially irrelevant, and the ferromagnetic-like response of the irradiated graphite is due to structural defects regardless of their origin.

Place, publisher, year, edition, pages
Weinheim: WILEY-VCH , 2010. Vol. 247, no 11-12, 2988-2991 p.
Keyword [en]
graphite, helium, induced ferromagnetism, protons
Identifiers
URN: urn:nbn:se:umu:diva-37962DOI: 10.1002/pssb.201000114ISI: 000285798400082OAI: oai:DiVA.org:umu-37962DiVA: diva2:371292
Available from: 2010-11-19 Created: 2010-11-19 Last updated: 2017-12-12Bibliographically approved

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Makarova, TatianaShelankov, Andlei L.

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