Ferromagnetism induced by heavy-ion irradiation in fullerene films

Kumar, Amit; Avasthi, D.K.; Pivin, J.C.; Tripathi, A.; Singh, Fouran

doi:10.1103/physrevb.74.153409

Cited by 51 publications

(33 citation statements)

References 32 publications

(44 reference statements)

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“…284 Besides this, ordering of fullerene thin films under highenergy ion irradiation ͑200 MeV Au and 60 MeV Ni ions͒ has been reported, 66 probably due to effects of ion-beam heating and a vanishingly small probability for defect production in a very thin target. Besides this, fullerene films irradiated with 250 keV Ar and 92 MeV Si ions showed magnetic response, 285 as evidenced by magnetic measurements using a superconducting quantum interference device and magnetic force microscopy. A ferromagnetic behavior increasing with ion fluence was observed.…”

Section: Ion Irradiation Of Fullerenes and Fullerene-nanotube Systemsmentioning

confidence: 90%

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Ion and electron irradiation-induced effects in nanostructured materials

Krasheninnikov¹,

Nordlund²

2010

Journal of Applied Physics

935

591

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A common misconception is that the irradiation of solids with energetic electrons and ions has exclusively detrimental effects on the properties of target materials. In addition to the well-known cases of doping of bulk semiconductors and ion beam nitriding of steels, recent experiments show that irradiation can also have beneficial effects on nanostructured systems. Electron or ion beams may serve as tools to synthesize nanoclusters and nanowires, change their morphology in a controllable manner, and tailor their mechanical, electronic, and even magnetic properties. Harnessing irradiation as a tool for modifying material properties at the nanoscale requires having the full microscopic picture of defect production and annealing in nanotargets. In this article, we review recent progress in the understanding of effects of irradiation on various zero-dimensional and one-dimensional nanoscale systems, such as semiconductor and metal nanoclusters and nanowires, nanotubes, and fullerenes. We also consider the two-dimensional nanosystem graphene due to its similarity with carbon nanotubes. We dwell on both theoretical and experimental results and discuss at length not only the physics behind irradiation effects in nanostructures but also the technical applicability of irradiation for the engineering of nanosystems.

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Section: Ion Irradiation Of Fullerenes and Fullerene-nanotube Systemsmentioning

confidence: 90%

“…Observations of ferromagnetism in various metal-free carbon systems, such as polymerized fullerenes and graphite, 285,[457][458][459][460] have stimulated much experimental and theoretical research work on the magnetic properties of allcarbon systems, for an overview, see Ref. 461 and references therein.…”

Section: Magnetic Propertiesmentioning

confidence: 99%

Ion and electron irradiation-induced effects in nanostructured materials

Krasheninnikov¹,

Nordlund²

2010

Journal of Applied Physics

935

591

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“…The driving force behind these studies was not only to create technologically important, light, nonmetallic magnets with a Curie point well above room temperature, but also to understand a fundamental problem: the origin of magnetism in a system which traditionally has been thought to show diamagnetic behavior only. In addition to polymerized fullerenes, 120 nanotubes, 121 graphite, 122 and nanodiamonds, 123 magnetism was recently reported for graphene produced from graphene oxide. 124 On the basis of calculations, the observed magnetic behavior in all these systems was explained in terms of defects in the graphitic network (either native or produced by ion irradiation) such as under-coordinated carbon atoms, for example, vacancies, 125 interstitials, 126 carbon adatoms, 47 and atoms at the edges of graphitic nanofragments with dangling bonds either passivated with hydrogen atoms or free.…”

Section: Properties Of Defective Graphenementioning

confidence: 99%

Structural Defects in Graphene

2010

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Graphene is one of the most promising materials in nanotechnology. The electronic and mechanical properties of graphene samples with high perfection of the atomic lattice are outstanding, but structural defects, which may appear during growth or processing, deteriorate the performance of graphenebased devices. However, deviations from perfection can be useful in some applications, as they make it possible to tailor the local properties of graphene and to achieve new functionalities. In this article, the present knowledge about point and line defects in graphene are reviewed. Particular emphasis is put on the unique ability of graphene to reconstruct its lattice around intrinsic defects, leading to interesting effects and potential applications. Extrinsic defects such as foreign atoms which are of equally high importance for designing graphene-based devices with dedicated properties are also discussed.

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“…The nano track evolution in fullerene matrix by cluster ion (C 60 ) is induced in the fullerene films irradiated up at normal and grazing angle to a fluence of 1×10 10 ions.cm -2 . Figure 1 [22].…”

Section: Resultsmentioning

confidence: 99%

“…In the present study we investigate dense electronic energy deposition effects in fullerene films, which have semiconducting properties with optical band gap ~2 eV. In this material, there have been a few studies of the damage induced by swift heavy ions, using FTIR, Raman and other techniques [7,10,21,22]. The formation of tracks in fullerene films was first explained by Dufour et al [23], in the electronic energy loss region from 3 keV/nm to 10 keV/nm by thermal spike calculations.…”

Section: Introductionmentioning

confidence: 99%