Axial parameter D of octahedral S-state ions in garnets |
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Authors: | P Novák V Havlíček |
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Institution: | (1) Institute of Solid State Physics, Czechosl. Acad. Sci., Prague, Cukrovarnická 10, 162 53 Praha 6, Czechoslovakia |
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Abstract: | The values of the spin-hamiltonian parameters are reported for systems Fe3+:Ca3Sc2Ge3O12, Fe3+:Na3Sc2V3O12 and Mn2+:Na3Sc2V3O12. The values of the axial parameterD together with the values ofD compiled from literature are used in the discussion of the origin ofD. A close correlation ofD with the trigonal deformation of the octahedron of S-state ion indicates the importance of the covalency effects. On the other hand, it is shown thatD can be hardly understood on the basis of the relativistic model only.We are indebted to Dr. B. V.Mill of Moscow State University (USSR) for supplying the single crystals of Na3Sc2V3O12 and Ca3Sc2Ge3O12 garnets. |
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