Observation of resistance switching between insulating and metallic states in nano-crystalline La0.65Ca0.35MnO3 film

The magnetic and transport properties of a 20-nm-scale twinned La0.65Ca0.35MnO3 film have been investigated in a temperature range of 77-300 K. The coexistence of ferromagnetic metallic (FM) and charge-ordered insulating (COI) phases is suggested based on analysis of resistance temperature and curre...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2003-07, Vol.334 (3-4), p.403-407
Main Authors: PROKHOROV, V. G, KAMINSKY, G. G, KOMASHKO, V. A, LEE, Y. P, KRAVCHENKO, I. I
Format: Article
Language:English
Subjects:
Colossal magnetoresistance
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Magnetic properties and materials
Magnetotransport phenomena, materials for magnetotransport
Physics
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Summary:The magnetic and transport properties of a 20-nm-scale twinned La0.65Ca0.35MnO3 film have been investigated in a temperature range of 77-300 K. The coexistence of ferromagnetic metallic (FM) and charge-ordered insulating (COI) phases is suggested based on analysis of resistance temperature and current dependencies at low temperatures. It is shown that thermocycling leads to formation of a non-equilibrium state in the ensemble of the charge-ordered domains and to appearance of a giant (up to 100%) resistance switching between MF and COI states. The experimental results are discussed from the viewpoint of the phase separation phenomenon.
ISSN:0921-4526
1873-2135
DOI:10.1016/S0921-4526(03)00105-4