Published August 2001 | Version v1
Journal article Metadata-only

Phase relations in the Bi-Sr-Ca-Cu-M-O (M = Y, Dy, Ho, Er, Tm, Yb, Lu) systems

Creators

  • 1. Moskovskij Gosudarstvennyj Univ. im. M.V. Lomonosova, Moscow (Russian Federation)
  • 2. Inst. Maksa Planka po Issledovaniyu Tverdogo Tela, Shtuttgart (Germany)

Description

One studied the phase relations in Bi-Sr-Ca-Cu-M-O (M - Y, Dy, Ho, Er, Tm, Yb, Lu) within the limited range of compositions near to Bi2Sr2CaCu2O8+x (Bi-2212) within 850-990 deg C temperature interval. It is shown that in case of REE with long ionic radius (Y, Dy, Ho, Er) REE substitutes for calcium in Bi-2212 with CaO formation. In case of REE with a shorter ionic radius (Tm, Yb, Lu), the degree of calcium substitution is a lower one and Sr2MBiO6 phase is formed. The temperature of superconducting transition of Bi-2212 specimens alloyed by REE is the maximum one for Lu and drops rapidly with increase of REE radius

Abstract (Russian)

Изучено фазообразование в системах Bi-Sr-Ca-Cu-M-O (M - Y, Dy, Ho, Er, Tm, Yb, Lu) в ограниченной области составов, прилегающих к Bi2Sr2CaCu2O8+x (Bi-2212), в интервале температур 850-990 град С. Показано, что в случае РЗЭ с большим ионным радиусом (Y, Dy, Ho, Er) происходит замещение кальция в Bi-2212 на РЗЭ с выделением CaO. В случае РЗЭ с меньшим ионным радиусом (Tm, Yb, Lu) степень замещения кальция ниже, и образуется фаза Sr2MBiO6. Темпрература сверхпроводящего перехода образцов Bi-2212, легированных РЗЭ, максимальна для Lu и быстро падает с увеличением радиуса РЗЭ

Additional details

Additional titles

Original title (Russian)
Фазообразование в системах Би-Ср-Cа-Cу-М-О, где М - Ы, Ды, Хо, Ер, Тм, Ыб, Лу

Publishing Information

Journal Title
Neorganicheskie Materialy
Journal Volume
37
Journal Issue
8
Journal Page Range
p. 960-964
ISSN
0002-337X
CODEN
NEOMB8

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
33049506
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
BISMUTH OXIDES; CALCIUM OXIDES; COPPER OXIDES; CRYSTAL LATTICES; DYSPROSIUM ADDITIONS; HIGH-TC SUPERCONDUCTORS; LATTICE PARAMETERS; PHASE STUDIES; STRONTIUM OXIDES; THULIUM ADDITIONS; TRANSITION TEMPERATURE; YTTRIUM ADDITIONS
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; ALLOYS; BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; CRYSTAL STRUCTURE; DYSPROSIUM ALLOYS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; RARE EARTH ADDITIONS; RARE EARTH ALLOYS; STRONTIUM COMPOUNDS; SUPERCONDUCTORS; THERMODYNAMIC PROPERTIES; THULIUM ALLOYS; TRANSITION ELEMENT COMPOUNDS; TYPE-II SUPERCONDUCTORS

Optional Information

Notes
12 refs., 2 figs., 5 tabs.