Lattice Dynamics of Inverse Spinel Structure Sulphides

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概要

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• Lattice dynamical calculations of inverse spinel type sulphides AB_2X_4 have been performed using a force constant model. The dynamical matrix for the first time has been analytically solved at the zone centre. The analytical solution provides 5 Raman modes similar to the normal spinel structure and 24 infrared modes different from the normal spinel compounds. It has been found that the randomness of the A- and B-ions on the octahedral sites does not change the frequencies theoretically in the present treatment where the interatomic interactions are confined upto third nearest neighbour. Similar to normal spinel sulphides, it has been found that the nearest neighbour interatomic interaction (tetrahedral) is weaker than next nearest interaction (octahedral). The agreement obtained between theory and the available experimental results in case of MnIn_2S_4, FeIn_2S_4, CoIn_2S_4 and NiIn_2S_4 is satisfactory.

• 社団法人日本物理学会の論文
• 1995-01-15

著者

• Gupta H.C.

  Physics Department, Indian Institute of Technology:Physics Department, Kirori Mal College, University of Delhi

• Gupta C.

  Physics Department, Indian Institute of Technology

関連論文

• Thermoelectric Power of III-V Ternary Mixed Crystals
• A Model Pseudopotential for Transition Metals
• Thermal Properties of Ta-W Alloys
• Lattice Dynamics of Inverse Spinel Structure Sulphides

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