A well-characterized Eu-doped Bi2Sr2Ca1-xEuxCu2Oy (x=0 to 1) system has been studied using core-level photoemission. The trivalent Eu is found to be incorporated into the lattice, causing an increase in the valence states of Bi, Sr and Ca and a decrease in the Cu valence. The observed superconductor-insulator transition in this system is found to be caused by an enhanced insulating nature of the Bi-O planes and a decrease in the O 2p hole concentration in the Cu-O planes. The results of Sr 3d, Ca 2p, Cu 2p and Bi 4f core-level spectra are discussed in detail.

Core Level X-ray Photoemission Studies of Bi2Sr2Ca1-xEuxCu2Oy / B. R., Sekhar; P., Srivastava; Saini, Naurang Lal; K. V. R., Rao; S. K., Sharma; K. B., Garg; S. K., Agarwal; V. P. S. AWANA, A. V. NARLIKAR. - In: PHYSICA. C, SUPERCONDUCTIVITY. - ISSN 0921-4534. - STAMPA. - 206(1993), pp. 139-147. [10.1016/0921-4534(93)90713-Z]

Core Level X-ray Photoemission Studies of Bi2Sr2Ca1-xEuxCu2Oy

SAINI, Naurang Lal;
1993

Abstract

A well-characterized Eu-doped Bi2Sr2Ca1-xEuxCu2Oy (x=0 to 1) system has been studied using core-level photoemission. The trivalent Eu is found to be incorporated into the lattice, causing an increase in the valence states of Bi, Sr and Ca and a decrease in the Cu valence. The observed superconductor-insulator transition in this system is found to be caused by an enhanced insulating nature of the Bi-O planes and a decrease in the O 2p hole concentration in the Cu-O planes. The results of Sr 3d, Ca 2p, Cu 2p and Bi 4f core-level spectra are discussed in detail.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11573/130518
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