Modulation structure in Bi{sub 2}Sr{sub 1.8}La{sub 0.2}Cu{sub 1{minus}{ital x}}{ital M}{sub {ital x}}O{sub {ital y}} ({ital M}=Fe, Co, Ni, and Zn)
- Structure Research Laboratory, University of Science and Technology of China, Hefei, Anhui, 230026, People`s Republic of (China)
- Chinese Center of Advanced Science and Technology (World Laboratory), P.O. Box 8730, Beijing, People`s Republic of (China)
Transition-metal-doped Bi{sub 2}Sr{sub 1.8}La{sub 0.2}Cu{sub 1{minus}{ital x}}{ital M}{sub {ital x}}O{sub {ital y}} ({ital M}=Fe, Co, Ni, and Zn) samples were synthesized. X-ray diffraction analysis showed that these 3{ital d} elements had different solubility in Bi{sub 2}Sr{sub 1.8}La{sub 0.2}CuO{sub {ital y}}. The limits of solid solution formation were at {ital x}=0.5 for the Fe system, {ital x}=1.0 for the Co system, and {ital x}=0.1 for the Ni and Zn systems. The effect of these 3{ital d} metal substitutions for Cu on the incommensurate modulation structure in Bi{sub 2}Sr{sub 1.8}La{sub 0.2}CuO{sub {ital y}} was examined by means of electron diffraction. The experimental results showed that all the substitutions of Fe, Co, Ni, and Zn for Cu decreased the modulation periodicity. It decreased from 4.32{ital b} at {ital x}=0 to 3.95{ital b} at {ital x}=0.5 for the Fe system, 3.82{ital b} at {ital x}=1.0 for the Co system, 4.24{ital b} at {ital x}=0.1 for the Ni system, and 4.18{ital b} at {ital x}=0.1 for the Zn system, respectively. In addition, the structure distortion characteristic related to the change in the incommensurate modulation was examined with Raman scattering. The experimental data showed that the vibration properties of the oxygen atoms in both Bi-O and Sr-O bondings also changed with the decrease in the modulation periodicity. This behavior can be considered a consequence of structural relaxation caused by the enhancement of the degree of crystal misfit. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 283908
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 18 Vol. 53; ISSN 0163-1829; ISSN PRBMDO
- Country of Publication:
- United States
- Language:
- English
Similar Records
Synthesis and study in 23 metal-La-Cu-O systems
Magnetism and superconductivity in 3 d -metal-substituted Bi-based cuprates having the 2:2:0:1 structure