Partially disordered antiferromagnetic phase in Ca(3)CoRhO(6).
Neutron diffraction experiments are reported on Ca(3)CoRhO(6) which consists of ferromagnetic Ising spin chains on a triangular lattice. It was first confirmed from temperature dependence of the (110) peak intensity that Ca(3)CoRhO(6) realizes a partially disordered antiferromagnetic state, where 2/3 of the ferromagnetic chains order antiferromagnetically with each other and the remaining 1/3 are left incoherent with the other chains. The 1/3 incoherent ferromagnetic Ising chains freeze to maintain a disordered state at lower temperatures. This compound is successfully discussed as a candidate of a nonequilibrium one-dimensional Ising model.
Niitaka
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Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan.
Yoshimura
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Kosuge
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Nishi
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Kakurai
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