ac Conductivity of mixed spinel NiAl0.7Cr0.7Fe0.6O4 |
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| Authors: | A K Rajarajan SM Yusuf P Balaya RG Kulkarni |
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| Institution: | (1) Solid State Physics Division, Bhabha Atomic Research Centre, 400 085 Mumbai, India;(2) IUC-DAEF Mumbai Centre, Bhabha Atomic Research Centre, 400 085 Mumbai, India;(3) Department of Physics, Saurashtra University, 360 005 Rajkot, India |
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| Abstract: | ac Conductivity measurements are carried out across the metal to insulator transition in NiAl0.7Cr0.7Fe0.6O4. The low frequency data is analyzed using Summerfield scaling theory for hopping conductivity. The exponent of the scaling
behavior has significantly different values in the conducting and insulating regimes. The hopping frequency and the zero frequency
conductivity are found to increase with temperature, slowly in the metallic regime and rapidly in the insulating regime. |
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| Keywords: | Spinel ac conductivity frequency response |
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