Fabrication and Magnetotransport Properties of Carbon Films with Embedded Metal Nanoclusters

• Authors: V. Ksenevich , I. Bashmakov , A. Melnikov , A. Wieck
• Languages of publication: EN

Abstracts

EN

2-dimensional arrays of Co- and Pd-clusters embedded in carbon films were fabricated by means of heat-treatment method of carboxylated cellulose films after the exchange of COOH-group protons by Co- and Pd-cations. The sizes of metal clusters within range 10 nm-1μm were obtained in dependence on the heat-treatment temperature. The dependencies of the resistance on temperature and magnetic field for the samples annealed at T=700ºC and 900ºC were measured. The R(T) dependencies both for carbon films with Co- and Pd-clusters can be fitted by expression R=R_0 exp(T_0/T)^{1/n} inherent for variable-range hopping. In the whole range of investigated magnetic field and temperature magnetoresistance was negative and can be related to quantum interference in the variable range hopping transport along neighboring alternative paths.

Keywords

EN

61.46.+w; 73.63.-b; 75.47.-m

Discipline

• 75.47.-m: Magnetotransport phenomena; materials for magnetotransport(for spintronics, see 85.75.-d; see also 72.25.-b Spin polarized transport; 72.15.Gd Galvanomagnetic and other magnetotransport effects; for magnetotransport effects in thin films, see 73.50.Jt; see also 73.43.Qt Magnetoresistance)
• 73.63.-b: Electronic transport in nanoscale materials and structures(see also 73.23.-b Electronic transport in mesoscopic systems)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2005
• Volume: 107
• Issue: 2
• Pages: 356-360

Dates

published

2005-02

received

2004-08-22

Contributors

author

V. Ksenevich

• Laboratory of Physics of Electronic Materials, Department of Physics, Belarus State University, F. Skaryna av. 4, 220050 Minsk, Belarus

author

I. Bashmakov

• Department of Chemistry, Belarus State University, F. Skaryna av. 4, 220050 Minsk, Belarus

author

A. Melnikov

• Department of Physics and Astronomy, Bochum Ruhr-University, Universitaetstr., 150, 44780 Bochum, Germany

author

A. Wieck

• Department of Physics and Astronomy, Bochum Ruhr-University, Universitaetstr., 150, 44780 Bochum, Germany

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Identifiers

DOI

10.12693/APhysPolA.107.356