Anisotropy effects in the ferromagnetic quantum chain systems (C6H11NH3)CuCl3 (CHAC) and (C6H11NH3)CuBr3 (CHAB)

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Abstract

Heat capacity and magnetization measurements on the title compounds revealed that they are very good approximations of a ferromagnetic S = 12 Heisenberg chain system. The small anisotropy present in these compounds gives rise to very pronounced cross-over effects. In CHAC, the cross-over temperature is increased by a magnetic field parallel to the easy axis.

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On leave from Institute for Solid State Physics, University of Tokyo, Roppongi 7, Tokyo, Japan.

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