Novel magnetic properties of graphene: Presence of both ferromagnetic and antiferromagnetic features and other aspects

Details Novel magnetic properties of graphene: Presence of both ferromagnetic and antiferromagnetic features and other aspects Novel magnetic properties of graphene: Presence of both ferromagnetic and antiferromagnetic features and other aspects

2009-04-17

arxiv.org/abs/0904.2739v1

Physics

Chemical Physics

16 pges, 5 figures

Scientific paper

Investigations of the magnetic properties of graphenes prepared by different methods reveal that dominant ferromagnetic interactions coexist along with antiferromagnetic interactions in all the samples. Thus, all the graphene samples exhibit room-temperature magnetic hysteresis. The magnetic properties depend on the number of layers and the sample area, small values of both favoring larger magnetization. Molecular charge-transfer affects the magnetic properties of graphene, interaction with a donor molecule such as tetrathiafulvalene having greater effect than an electron-withdrawing molecule such as tetracyanoethylene

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