A comparative study of superconducting LaBa2Cu3O7−δ and La3−xBa3+xCu6O14+δ


Autoria(s): Ganapathi, L; Ganguli, AK; Ram, Mohan RA; Rao, CNR
Data(s)

01/04/1988

Resumo

Based on X-ray diffraction and electron microscopy it is shown that oxides of the general formula La Ba2Cu3O7−δ become tetragonal when δ deviates slightly from 0. This tetragonal structure is similar to that of La3−xBa3+xCu6O14+δ, with a cubic perovskite subcell and triple periodicity. Electron micrographs of these tetragonal oxides show 90° microdomains. Orthorhombic LaBa2Cu3O7−δ with high Tc (not, vert, similar77 K) is found only when δ reverse similar, equals 0; this sample is subject to formation of twins. Fluorine substitution seems to favor superconductivity.

Formato

application/pdf

Identificador

http://eprints.iisc.ernet.in/31584/1/comparitive.pdf

Ganapathi, L and Ganguli, AK and Ram, Mohan RA and Rao, CNR (1988) A comparative study of superconducting LaBa2Cu3O7−δ and La3−xBa3+xCu6O14+δ. In: Journal of Solid State Chemistry, 73 (2). pp. 593-598.

Publicador

Elsevier science

Relação

http://dx.doi.org/10.1016/0022-4596(88)90154-5

http://eprints.iisc.ernet.in/31584/

Palavras-Chave #Solid State & Structural Chemistry Unit
Tipo

Editorials/Short Communications

PeerReviewed