title: Magnetic force microscopy of nano-size magnetic domain ordering in heavy ion irradiated fullerene films.
abstract: In the present work, magnetic force microscopy is employed to investigate the magnetic ordering in ion irradiated fullerene films. It is observed that magnetic domain size is approximately 100-200 nm and magnetic signal is stronger at the domain boundaries. Magnetic signal arise in irradiated films is confirmed by magnetic measurements using a superconducting quantum interference device which increases with the ion fluence. The induced magnetism is possibly due to structural defects in the amorphous carbon phase formed by ion irradiation.
authors.affiliation: Materials Science Group, Inter-University Accelerator Centre, New Delhi 110067, India.
authors.forename: Amit
authors.initials: A
authors.lastname: Kumar
authors.forename: D K
authors.initials: DK
authors.lastname: Avasthi
authors.forename: J C
authors.initials: JC
authors.lastname: Pivin
authors.forename: R M
authors.initials: RM
authors.lastname: Papaléo
authors.forename: A
authors.initials: A
authors.lastname: Tripathi
authors.forename: F
authors.initials: F
authors.lastname: Singh
authors.forename: I
authors.initials: I
authors.lastname: Sulania
mesh_terms: D003460:Crystallization / Q000379:methods*; D004574:Electromagnetic Fields; D037741:Fullerenes / Q000737:chemistry* / Q000528:radiation effects; D020450:Heavy Ions; D046911:Macromolecular Substances / Q000737:chemistry; D008280:Magnetics; D008422:Materials Testing; D008567:Membranes, Artificial; D018625:Microscopy, Atomic Force / Q000379:methods*; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000528:radiation effects / Q000648:ultrastructure; D036103:Nanotechnology / Q000379:methods*; D010316:Particle Size; D013499:Surface Properties
chemical_list: D037741:Fullerenes; D046911:Macromolecular Substances; D008567:Membranes, Artificial