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ELECTRICAL AND MAGNETIC BEHAVIOR OF TRANSITION METAL OXIDES Ln_0.7A_0.3TMO₃, Ln= La, Pr; A = Ca, Sr AND TM = Mn, Co

Faculatea de Fizica, Universitatea Babes-Bolyai, Str. Kogalniceanu 1, Cluj-Napoca 400084, Romania

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Faculatea de Fizica, Universitatea Babes-Bolyai, Str. Kogalniceanu 1, Cluj-Napoca 400084, Romania

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Faculatea de Fizica, Universitatea Babes-Bolyai, Str. Kogalniceanu 1, Cluj-Napoca 400084, Romania

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Faculatea de Fizica, Universitatea Babes-Bolyai, Str. Kogalniceanu 1, Cluj-Napoca 400084, Romania

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Faculatea de Fizica, Universitatea Babes-Bolyai, Str. Kogalniceanu 1, Cluj-Napoca 400084, Romania

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https://doi.org/10.1142/S0217979210064393Cited by:5 (Source: Crossref)

Abstract

We present a detailed magnetic study of the polycrystalline transition metal oxides Ln_0.7A_0.3TMO₃, Ln = La, Pr; A = Ca, Sr and TM = Mn, Co at low temperatures including electrical resistance, magnetization and ac susceptibility measurements. The effect of the A-site and B-site substitutions on the properties of these compounds is discussed. The results of this analysis indicate that the electrical and magnetic behavior of these compounds have some reminiscences of the manganites having similar formula, but the spin disorder and the grain boundary effects control the properties of these materials.

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Vol. 24, No. 06n07

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History

Received 30 August 2009

Revised 23 December 2009

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