Published February 2000 | Version v1
Journal article Metadata-only

Effect of cationic composition on magnetic flux pinning efficiency in superconducting ceramics Bi2+ySr2-xCa1+xCu2O8+δ

Creators

  • 1. Moskovskij Gosudarstvennyj Univ. im. M.V. Lomonosova, Moscow (Russian Federation)

Description

Magnetic properties of one-phase samples of superconductivity ceramics Bi2+ySr2-xCa1+xCu2O8+δ (Bi-2212) (0 ≤ x ≤ 0.6 at y 0.2 and 0.2 ≤ x ≤ 0.6 at y = 0) depending on their cationic composition are studied in the temperature range of 20-100 K. It is ascertained that pinning effectiveness in grains of Bi-2212 ceramics increases both with increase in Sr : Ca ratio and with decrease in bismuth content. Irreversibility parameter T*/Tc decreases essentially with oxygen index decrease in Bi2.2Sr2Cu2.2O8+δ

Abstract (Russian)

В интервале температур 20-100 К изучены магнитные свойства однофазных образцов сверхпроводящей керамики Bi2+ySr2-xCa1+xCu2O8+δ (Bi-2212) (0 ≤ x ≤ 0,6 при y = 0,2 и 0,2 ≤ x ≤ 0,6 при y = 0) в зависимости от их катионного состава. Установлено, что эффективность пиннинга в зернах керамики Bi-2212 возрастает как с увеличением отношения Sr к Ca, так и при снижении содержания висмута. Параметр необратимости T*/Tc значительно уменьшается при понижении кислородного индекса в Bi2.2Sr2Cu2.2O8+δ

Additional details

Additional titles

Original title (Russian)
Влияние катионного состава на эффективност' пиннинга магнитного потока в сверхпроводящей керамике Би

Publishing Information

Journal Title
Doklady Akademii Nauk - Rossijskaya Akademiya Nauk
Journal Volume
370
Journal Issue
6
Journal Page Range
p. 767-769
ISSN
0869-5652
CODEN
DAKNEQ

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
33004284
Subject category
S36: MATERIALS SCIENCE; S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Descriptors DEI
BISMUTH OXIDES; CALCIUM OXIDES; CATIONS; CERAMICS; CHEMICAL COMPOSITION; COPPER OXIDES; HIGH-TC SUPERCONDUCTORS; MAGNETIC FLUX; MAGNETIC SUSCEPTIBILITY; STRONTIUM OXIDES; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0013-0065 K; TEMPERATURE RANGE 0065-0273 K
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; CHALCOGENIDES; CHARGED PARTICLES; COPPER COMPOUNDS; IONS; MAGNETIC PROPERTIES; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; STRONTIUM COMPOUNDS; SUPERCONDUCTORS; TEMPERATURE RANGE; TRANSITION ELEMENT COMPOUNDS; TYPE-II SUPERCONDUCTORS

Optional Information

Notes
8 refs., 3 figs., 1 tab.