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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 T-SP 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.
