Abstract
We investigated the effect of doping CuGeO3 with Zn, Ni, Mn and Mg on the Cu-site, and Al, Si, Ga, As, In, Sn, Sb and Ti on the Ge-site. The lattice parameters show a linear dependence on doping. The spin-Peierls (SP) transition temperature TSP decreases linearly with increasing substitution, the slope depending on the dopant. For increasing Zn-content, a Neel-like groundstate which exhibits spin-flop-behaviour appears after the disappearence of the SP-ground-state. Si-and Ti-doped samples exhibit a similar phase in co-existence with the SP-groundstate.
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