[seminar] podsjetnik na DANASNJI seminar na IFu u 15:00

[Berislav Horvatić]

Poštovani,
podsjećamo Vas na današnji seminar na Institutu za fiziku,
u utorak, 12. siječnja, u 15:00 sati u zgradi Mladen Paić,
koji će održati Luka Ćirić
iz Institut de Physique de la Matiere Condensée, Station 3,
Ecole Poloytechnique Fédérale de Lausanne, Švicarska.

Voditelji seminara
Berislav Horvatić i Marko Kralj

Sažetak predavanja je u nastavku poruke:



      Institut za fiziku, Bijenička cesta 46,

      predavaonica u zgradi Mladen Paić

      utorak, 12. siječnja 2010, u 15:00 sati

       

       
     
      Electron Spin Resonance study of Graphene
     
      Luka Ćirić
     
       

      Institut de Physique de la Matiere Condensée, Station 3,

      Ecole Polytechnique Fédérale de Lausanne,

      CH-1015 Lausanne

      E-mail: luka.ciric at epfl.ch

       
     
      Electron spin resonance (ESR) is an efficient technique to study the density of states (as a function of temperature and doping) of graphene, and to detect magnetic interaction of localized spins at the edges of graphene flakes and ribbons. We have performed ESR measurements in the 4-300 K temperature range on graphene samples derived from: (1) chemical reduction of graphene oxide sheets, (2) liquid phase exfoliation of graphite (LPEG), 3) and mechanical exfoliation. The ESR signal depends very much on the method of preparation of graphene. The amount of localized spins and the Pauli component of the spin susceptibility vary from sample to sample. In some cases ferromagnetism is observed below 20 K.

      The work is performed in collaboration with A. Sienkiewicz, A. Olariu, A. Magrez , R. Nesper, J. Coleman and K. Kern and Forró László. The project is partially supported by MaNEP and by the European Network IMPRESS.

      http://ipmc.epfl.ch/                                       http://lnnme.epfl.ch/

       
     
      Voditelji seminara IF-a:  Berislav Horvatić  &  Marko Kralj
     
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