2012
DOI: 10.1063/1.3678641
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Low-temperature resistance minimum in granular hole-doped cobaltites

Abstract: It is for the first time that in three-dimensional granular cobaltites (La1−x Srx)1−yAgyCoO3 with a grain size of about 1 μm and replacement ratios x = 0.35 and y = 0, 0.05 a “metal–nonmetal” conductivity transition was observed, presumably associated with the AFM ordering of granule moments. This transition manifests itself as a minimum in the temperature dependence of resistance of the samples. An explanation of the nature of the minimum is proposed, based on the intragranular mechanism of electron correlati… Show more

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Cited by 4 publications
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