Enhancement of the magnetoresistive effect in nanocomposites based on manganite La0.67Sr0.33MnO3 and magnetite Fe3O4

S.A. Pud, V.F. Kovalenko, M.V. Petrichuk

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2 Citations (Scopus)

Abstract

The effect of a magnetite Fe3O4 nanopowder in a nanocomposite with manganite La0. 67Sr0. 33MnO3 on its magnetoresistive effect and conductivity is studied. The addition of a magnetite nanopowder to the initial material leads to a substantial (twofold) increase in the low-field magnetoresistive effect. The low-field magnetoresistive effect in substituted lanthanum manganite nanopowders is based on spin-dependent electron tunneling through grain boundaries. The transport mechanisms in such systems are analyzed, and noise spectroscopy is also used for this purpose.

Original languageEnglish
Pages (from-to)521-525
Number of pages5
JournalTechnical Physics
Volume55
Issue number4
DOIs
Publication statusPublished - 2010
Externally publishedYes

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