1. Đuro Koruga, Mašinski fakultet Univerziteta u Beogradu, Serbia
2. Ivana Mileusnić, Serbia
3. Aleksandra Debeljković, Inovacioni centar Mašinskog fakulteta u Beogradu, Serbia
4. Ivan Djuricic, Mašinski fakultet Univerziteta u Beogradu, Serbia
Is carbon a magnetic material? According to textbook data the answer to that question is a definite no. This answer is based on well-known data that carbon atom is diamagnetic element with magnetic susceptibility =- 5 10-7 emu/g. Graphite susceptibility parallel to the planes is about equal to the free atom, while in the c-axis direction is = - 30 10-6 emu/g. Diamond, as bulk structure of carbon atoms, is also a diamagnetic material with = - 4.9 10-7 emu/g. Nevertheless carbon nanomaterials such as C60 has magnetic susceptibility of = -3.5 10-7 emu/g, C70 has = - 5.9 10-7 emu/g. while nanotube is in a range from = -1.6 10-5 to = -2.2 10-5 emu/g ,depends on magnetic field applying and temperature. All these data indicate that carbon materials are not magnetic. However, it is time to reconsider this dogma, because recently experiments have strongly indicated that, in certain forms, carbon can show not only paramagnetic, but also ferromagnetic characteristics.. To investigate these phenomena we use spin magnetometer to measure remanent magnetism of fullerene thin films, with accuracy of 3pT.
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