In situ resistivity measurement was used to study the crystallization and the electrical conduction processes of V3Si and VSi2 thin films as a function of temperature. The films were deposited by dual-electron-beam coevaporation through metallic masks in a van der Pauw configuration onto oxidized silicon substrates. In the as-deposited state the alloy thin films were amorphous. For the electrical characterization of VSi2, silicon-rich specimens with a V:Si atomic ratio of 1:3 were used.The kinetics of crystallization are well described by an equation of the Johnson-Mehl-Avrami type.Measurements of the electrical resistivity varrho over a wide temperature range (2–1100 K) on samples preheated at a high temperature exhibit a similar behavior for both the vanadium silicides, i.e. varrho rises less rapidly with temperature T than the Bloch-Grüneisen theory predicts and seems to approach a saturation value at the higher temperatures. An empirical formula is used to obtain a best fit of the resistivity curves. Polycrystalline V3Si thin film became superconductive at 15 K with a residual resistivity ratio of 10.6.

Electrical characterization of alloy thin films of VSi2 and V3Si / Nava, Filippo; Bisi, Olmes; P., Psaras; H., Takai; K. N., Tu. - In: THIN SOLID FILMS. - ISSN 0040-6090. - STAMPA. - 140(1986), pp. 167-172.

Electrical characterization of alloy thin films of VSi2 and V3Si

NAVA, Filippo;BISI, Olmes;
1986

Abstract

In situ resistivity measurement was used to study the crystallization and the electrical conduction processes of V3Si and VSi2 thin films as a function of temperature. The films were deposited by dual-electron-beam coevaporation through metallic masks in a van der Pauw configuration onto oxidized silicon substrates. In the as-deposited state the alloy thin films were amorphous. For the electrical characterization of VSi2, silicon-rich specimens with a V:Si atomic ratio of 1:3 were used.The kinetics of crystallization are well described by an equation of the Johnson-Mehl-Avrami type.Measurements of the electrical resistivity varrho over a wide temperature range (2–1100 K) on samples preheated at a high temperature exhibit a similar behavior for both the vanadium silicides, i.e. varrho rises less rapidly with temperature T than the Bloch-Grüneisen theory predicts and seems to approach a saturation value at the higher temperatures. An empirical formula is used to obtain a best fit of the resistivity curves. Polycrystalline V3Si thin film became superconductive at 15 K with a residual resistivity ratio of 10.6.
140
167
172
Electrical characterization of alloy thin films of VSi2 and V3Si / Nava, Filippo; Bisi, Olmes; P., Psaras; H., Takai; K. N., Tu. - In: THIN SOLID FILMS. - ISSN 0040-6090. - STAMPA. - 140(1986), pp. 167-172.
Nava, Filippo; Bisi, Olmes; P., Psaras; H., Takai; K. N., Tu
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11380/449353
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