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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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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description 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.
doi_str_mv 10.1016/S0921-4526(03)00105-4
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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
title Observation of resistance switching between insulating and metallic states in nano-crystalline La0.65Ca0.35MnO3 film
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