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Micro-Raman study of polycrystalline Bi2Sr2Ca1-xErxCu2O8+δ (0.0⩽x⩽1.0) composition

✍ Scribed by Abdus Sattar; J. P. Srivastava; S. V. Sharma; P. K. Khulbe; H. D. Bist

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
244 KB
Volume
28
Category
Article
ISSN
0377-0486

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✦ Synopsis

Micro-Raman spectra of erbium-doped Bi-2212 are reported. The assignment of the observed bands is made on the basis of the results of lattice dynamical calculations and known vibrational spectra of pure Bi-2212 and Y-123 systems. The characteristics of the observed bands seem to depend mainly on the extra oxygen entering the samples due to Er doping. 1997

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Electrical transport and magnetic behavior of the perovskite system Ln 0X8 Sr 0X2 (Co 1Àx Fe x )O 3 , where Ln = La, Nd, Sm, Eu; x 0.12 is reported. It is shown that both substitutions of lanthanium by rare-earth ions and cobalt by iron lead to the destruction of ferromagnetic ordering and an increa