Abstract
We have studied the magnetic state from a viewpoint of crystallographic features of the 1-D chain compound Ca0.824CuO2. A possible spin-hole arrangement in the magnetically coexisting state was determined by analyzing the local structural distortion in the CuO2 chain by means of a modulated-crystal-structure analysis. The essential periodic sequence expected is ⋅⋅⋅↑○↓↓○↑⋅⋅⋅ (↑↓: up- and down-spin, ○: hole), which can be regarded as a kind of spin-1/2 ferromagnetic-antiferromagnetic alternating Heisenberg chain.
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