Effect of 3d-metal sulfide doping on the superconducting properties of Bi-2212 superconductors

Author

Lima, C.L.S. ; Silva, P.B. ; Montarroyos, E. ; Yadava, Y.P. ; Aguiar, J.Albino

Author_Institution

Departamento de Fisica, Univ. Fed. de Pernambuco, Recife, Brazil

Volume

13

Issue

2

fYear

2003

fDate

6/1/2003 12:00:00 AM

Firstpage

3155

Lastpage

3157

Abstract

In the present work, we have studied the effect of 3d metal sulfide doping on the superconducting properties of the Bi-2212 superconductors with the nominal composition Bi_2.1Sr_2.1Ca_0.8[(CuO)_1-x(MS)_x┐<span>2/O_6+δ, where M = Ni, Cu, Zn, Ti. The samples were synthesized by solid state reaction process. Structural and magnetic characterization was carried out using x-ray diffractometry and magnetic susceptibility measurements. All the samples exhibited stabilization of superconducting Bi-2212 phase and reduction of superconducting transition temperature T_c. ZnS and TiS₂ substitution for CuO planes and modification of oxygen content due to S substitution on O places jointly produce strong localization of charge carriers and at the same time improve the hole concentration of the system. These combined phenomena are responsible for the deterioration of superconductivity of ZnS and TiS₂ doped Bi-2212 superconductors.

Keywords

X-ray diffraction; bismuth compounds; calcium compounds; high-temperature superconductors; hole density; magnetic susceptibility; strontium compounds; superconducting transition temperature; 3d-metal sulfide doping; Bi-2212 high-T_c superconductor; Bi₂Sr₂Ca[(CuO)(CuS)]₂O₆; Bi₂Sr₂Ca[(CuO)(NiS)]₂O₆; Bi₂Sr₂Ca[(CuO)(TiS₂)]₂O₆; Bi₂Sr₂Ca[(CuO)(ZnS)]₂O₆; X-ray diffractometry; hole concentration; magnetic characteristics; magnetic susceptibility; solid-state reaction; structural characteristics; superconducting properties; superconducting transition temperature; Bismuth; Doping; Magnetic susceptibility; Solid state circuits; Strontium; Superconducting magnets; Superconducting transition temperature; Superconductivity; X-ray diffraction; Zinc compounds;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2003.812128

Filename

1212293