| 摘要 |
PURPOSE:To obtain a novel compd. useful as a magnetic material, a semiconductor material and a catalyst by providing a compsn. consisting of Tm, Fe, Zn and O in a prescribed atomic ratio and a hexagonal layer structure. CONSTITUTION:A compd. of this invention has a hexagonal layer structure represented by a formula TmFeZn6O9. The ionic crystal model of the compd. is represented by Tm<3+>(Fe<3+>, Zn<2+>)Zn5<2+>O9<2->. The structure is formed by laminating TmO1.5, (Fe, Zn)O2.5 and ZnO layers and one of the characteristics of the compd. is its remarkable structural anisotropy. In the structure, one sixth of the Zn<2+> ions form (Fe<3+>, Zn<2+>)O2.5 layers with Fe<3+> and the remaining five sixths form ZnO layers. The compd. may be utilized as a magnetic body, a semiconductor and a catalytic substance each having highly anisotropic two-dimensional properties. |
