Surface magnetism in organic charge transfer salts |
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| Authors: | K Holczer G Grüner M Miljak J Cooper |
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| Institution: | Central Research Institute of Physics, Budapest, Hungary;Institute of Physics of the University, Zagreb, Croatia |
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| Abstract: | We have investigated the magnetic properties of the charge transfer salts Qn(TCNQ)2, Cs2(TCNQ)3 and TTF—TCNQ in the form of single crystals and after strong pressing or grinding to a fine powder, which introduces lattice defects and increases the surface area. It is found that for the former two compounds pressing or grinding leads to a non-linear, saturating component in the magnetisation field curves, whereas the effect is absent for TTF—TCNQ. It is suggested that this behaviour could arise from strongly coupled localised spins at the surface, i.e. surface magnetism in these materials. |
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