We report single-crystal neutron diffraction studies on a spinel antiferromagnet GeCo2O4, which exhibits magnetic order with a trigonal propagation vector and tetragonal lattice expansion (c/a ≃ 1.001) below TN 21 = K. For this inconsistency between spin and lattice in symmetry, magnetic Bragg reflections with a tetragonal propagation vector were discovered below TN. We discuss spin and orbital states of Co2+ ion underlying the new magnetic component.
|ジャーナル||Journal of Physics: Conference Series|
|出版ステータス||Published - 2011|
|イベント||International Conference on Frustration in Condensed Matter, ICFCM - Sendai, Japan|
継続期間: 2011 1月 11 → 2011 1月 14
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