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|Title:||Effect of Substitution on the Metal-Insulator Transition Temperature in Colossal Magneto-resistive Materials|
Agarwal, S K
Pandya, D K
|Abstract:||The insulator-metal transition temperature TMI of the colossal magneto-resistive materials with the perovskite structure (ABO3) depends upon the tolerance factor t and the lattice distortion associated with it. In this paper we report the effect of lattice distortion on TMI by tuning the tolerance factor t through substitution of different trivalent and divalent ions at A and B sites of La2/3Ca1/3,MnO3 type colossal magneto-resistive materials. The results have been analyzed in terms of a competition between double exchange and super-exchange mechanisms.|
|ISSN:||0975-2412 (Online); 0771-7706 (Print)|
|Appears in Collections:||BVAAP Vol.12(2) [December 2004]|
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