Electric transport in composite Fe–Ta–O granular film prepared by plasma jet technique

Electrical transport measurements on composite Fe 33.7Ta 9.5O 56.8 nanogranular magnetoresistive film prepared by supersonic plasma jet technique are reported. The temperature dependence of the resistance ln R∼T −1/2 correlates with a broad size distribution of Fe-nanocrystallites. The differential...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2002-02, Vol.240 (1), p.491-493
Main Authors: Lobotka, P., Vavra, I., Fendrych, F., Kraus, L.
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Coulomb blockade
Coulomb blockade
single-electron tunneling
Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures
Electronic transport in interface structures
Electronic transport in mesoscopic systems
Electronic transport phenomena in thin films and low-dimensional structures
Exact sciences and technology
Galvanomagnetic and other magnetotransport effects (including thermomagnetic effects)
Granular systems
Magnetoresistance – thin films
Physics
Tunneling
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Summary:Electrical transport measurements on composite Fe 33.7Ta 9.5O 56.8 nanogranular magnetoresistive film prepared by supersonic plasma jet technique are reported. The temperature dependence of the resistance ln R∼T −1/2 correlates with a broad size distribution of Fe-nanocrystallites. The differential conductance G( V) curves reveal a presence of tunneling in the range 300–4 K. The shape of the G( V, T) curves below ∼160 K indicates the presence of Coulomb blockade.
ISSN:0304-8853
DOI:10.1016/S0304-8853(01)00910-6