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High‐Temperature Electrical Properties of the Bi 2.1 Sr 1.9 (Ca 1– x Y x )Cu 2 O y Solid Solution
Author(s) -
Hong Byungsun,
Mason Thomas O.
Publication year - 1993
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1993.tb03653.x
Subject(s) - solid solution , tetragonal crystal system , superconductivity , orthorhombic crystal system , materials science , electrical resistivity and conductivity , cuprate , analytical chemistry (journal) , condensed matter physics , mineralogy , chemistry , crystallography , crystal structure , metallurgy , physics , chromatography , quantum mechanics
By a combination of conventional physical property measurements and high‐temperature electrical property studies, the solid solution limit, transport parameters, and potential defect regimes of the Bi 2.1 Sr 1.9 (Ca 1 ‐ x Y x )Cu 2 O y solid solution were established. A continuous solid solution extends to x = 0.7 or 0.8. The electrical properties indicate that the product of the hole density‐of‐states and mobility for semiconducting compositions is approximately an order of magnitude smaller than for the other p ‐type superconducting cuprates. A pronounced drop in hole concentration accompanies the tetragonal‐to‐orthorhombic transition at x = 0.5, whereafter superconductivity disappears. The electrical properties also indicate that a composition x change occurred reversibly below 1100°C.