Dysprosium doped Tl-1212 superconductors with varying Pb content

被引：5

作者：

Sudra, H.

Gritzner, G. ^{[1
]}

Puchinger, H.

Kavecansky, V.

机构：

[1] Johannes Kepler Univ, Inst Chem Technol Inorgan Mat, A-4040 Linz, Austria

[2] Slovak Acad Sci, Inst Expt Phys, Kosice 04001, Slovakia

来源：

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2006年 / 84卷 / 04期

关键词：

D O I：

10.1007/s00339-006-3634-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Dy-doped Tl-1212 superconductors with varying Tl stoichiometry (TlxPb1-x)(Ba0.05Sr0.95)(2)(Ca0.8Dy0.2)Cu2Oz (x=0.2,0.4,0.5,0.6,0.8,1.0) were fabricated by a two-step procedure. Tl-free precursors were prepared by a wet chemical malic acid gel method, followed by thallination at temperatures between 880 and 920 degrees C. X-ray diffraction was employed to determine the phase-purity of the samples. The best critical temperatures were obtained for samples with x: 0.4, 0.5 and 0.6. T-c(0) values up to 100 K could be obtained for samples with the composition (Tl0.4Pb0.6)(Ba0.05Sr0.95)(2)(Ca0.8Dy0.2)Cu2Oz sintered at 915 degrees C. Lower Tl stoichiometry resulted in secondary phases, higher Tl stoichiometry led to a decrease in the superconducting properties.

引用

页码：445 / 448

页数：4

共 12 条

[1] Grain boundary properties of T1-2212 and T1-1223 thin films [J].

Dark, C ;

Speller, S ;

Wu, H ;

Sundaresan, A ;

Tanaka, Y ;

Burnell, G ;

Grovenor, CRM .

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 2005, 15 (02) :2931-2934

[2]

Doi T., 1990, JPN J APPL PHYS, V29, P57

[3] Thallium-based cuprate superconductors doped with rare earth oxides [J].

Eder, MH ;

Gritzner, G .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2005, 18 (01) :87-91

[4] Preparation and properties of La0.67Pb0.33(Mn1-xFex)O3 compounds [J].

Gritzner, G ;

Koppe, M ;

Kellner, K ;

Przewoznik, J ;

Chmist, J ;

Kolodziejczyk, A ;

Krop, K .

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 2005, 81 (07) :1491-1495

[5]

KADUK J, 1997, NAT I STANDARDS TECH

[6] DETERMINATION OF THE OXYGEN-CONTENT IN THE SUPERCONDUCTING YBA2CU3O7-DELTA PHASE [J].

KARPPINEN, M ;

NIINISTO, L .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 1991, 4 (08) :334-336

[7] Changes in doping state of Tl(Sr2-xRx)CaCu2O7-delta (R = Sm, Eu, Dy) system [J].

Lee, WH ;

Huang, BC .

PHYSICA C, 1997, 289 (1-2) :114-122

[8] SUPERCONDUCTIVITY WITH TC(ZERO) ABOVE 105-K IN TI-CONTAINING SEPTENARY OXIDES WITH Y1BA2CU3OY-LIKE STRUCTURE [J].

LIANG, JM ;

LIU, RS ;

HUANG, YT ;

WU, SF ;

WU, PT ;

CHEN, LJ .

PHYSICA C, 1990, 165 (3-4) :347-353

[9] STRUCTURAL AND COMPOSITIONAL CHARACTERIZATION OF POLYCRYSTALS AND SINGLE-CRYSTALS IN THE BI-SUPERCONDUCTOR AND TL-SUPERCONDUCTOR SYSTEMS - CRYSTAL-STRUCTURE OF TLCABA2CU2O7 [J].

MOROSIN, B ;

GINLEY, DS ;

HLAVA, PF ;

CARR, MJ ;

BAUGHMAN, RJ ;

SCHIRBER, JE ;

VENTURINI, EL ;

KWAK, JF .

PHYSICA C, 1988, 152 (05) :413-423

[10] IODOMETRIC DETERMINATION OF OXYGEN CONTENTS OF THE TL SINGLE LAYER SYSTEM AND THEIR RELEVANCE TO SUPERCONDUCTIVITY [J].

NAKAJIMA, S ;

KIKUCHI, M ;

SYONO, Y ;

OKU, T ;

NAGASE, K ;

KOBAYASHI, N ;

SHINDO, D ;

HIRAGA, K .

PHYSICA C, 1991, 182 (1-3) :89-94

← 1 2 →