Structure and Magnetism of the Composite Crystal Ca0.824CuO2 |
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Authors: | Masaaki Isobe Koji Kimoto Eiji Takayama-Muromachi |
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Affiliation: | (1) National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan |
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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 ![sdot](/content/m67535168242k406/xxlarge8901.gif) ![sdot](/content/m67535168242k406/xxlarge8901.gif) ![sdot](/content/m67535168242k406/xxlarge8901.gif) ![uarr](/content/m67535168242k406/xxlarge8593.gif) ![cir](/content/m67535168242k406/xxlarge9675.gif) ![darr](/content/m67535168242k406/xxlarge8595.gif) ![darr](/content/m67535168242k406/xxlarge8595.gif) ![cir](/content/m67535168242k406/xxlarge9675.gif) ![uarr](/content/m67535168242k406/xxlarge8593.gif) ![sdot](/content/m67535168242k406/xxlarge8901.gif) ![sdot](/content/m67535168242k406/xxlarge8901.gif) (![uarr](/content/m67535168242k406/xxlarge8593.gif) : 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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