Neutron diffraction, specific heat and mu SR study of the spin-chain compounds Ca(2+x)Y(2-x)Cu(5)O(10)статья
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Аннотация:We report on neutron diffraction, specific heat and mu SR studies of the edge-sharing spin-chain compound Ca(2+x)Y(2-x)Cu(5)O(10). At small and intermediate hole doping (x<1) the ordered Cu moment decreases rapidly. Above x = 1 the long-range magnetic order disappears. The magnetic system develops into a state, where a spin-chain regime and static magnetic configurations formed by the residual spins coexist. Near x = 2 the static configurations are washed out. Only a spin-chain component is observed in the heavily doped sample in which long-range order recovers. (C) 2004 Published by Elsevier B.V.