(Bi,Pb)-Sr-Ca-Cu-O glass-ceramics - superconductor and granular metal

• Autorzy: Gazda M. , Kusz B. , Murawski L. , Stizza S. , Natali R.
• Języki publikacji: EN

Abstrakty

EN

In the (Bi,Pb)-Sr-Ca-Cu-O system, materials of various electrical and superconducting properties may be produced by a glass-ceramic method. As a result of heat treatment, amorphous material partially crystallizes. It causes an increase in the size and/or the number of conducting grains and a decrease in the width of the insulating barriers between them. The resistivity of the samples containing small, weakly coupled grains in the normal state follows the exponential temperature dependence of resistivity, while in the samples with larger intergrain conductivities the dependence is logarithmic. Still stronger connections between the grains lead to linear or almost linear ?(T). The granular character of the (Bi,Pb)4Sr3Ca3Cu4Ox materials also influences their superconducting properties.

Słowa kluczowe

EN

bi-based cuprates; mobility edges; hopping transport; granular; melt-textured; amorphous; and composite superconductors

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2008
• Tom: Vol. 38, nr 1
• Strony: 153--161
• Opis fizyczny: Bibliogr. 14 poz.

Twórcy

autor

Gazda M.

autor

Kusz B.

autor

Murawski L.

autor

Stizza S.

autor

Natali R.

• Faculty of Applied Physics and Mathematics, Gdansk University of Technology, Narutowicza 11/12, 80-952 Gdańsk, Poland

Bibliografia

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