STRUCTURAL STUDY OF LA1.93BI0.07CUO4+DELTA BY NEUTRON POWDER DIFFRACTION

Authors
KIM YI IZUMI F KAMIYAMA T TAKEDA Y HIROI Z TAKANO M GOLDSTONE A ONG E
Citation
Yi. Kim et al., STRUCTURAL STUDY OF LA1.93BI0.07CUO4+DELTA BY NEUTRON POWDER DIFFRACTION, Synthetic metals, 71(1-3), 1995, pp. 1629-1630
Citations number
3
Categorie Soggetti
Physics, Condensed Matter","Metallurgy & Metallurigical Engineering
Journal title
Synthetic metals → ACNP
ISSN journal
03796779
Volume
71
Issue
1-3
Year of publication
1995
Pages
1629 - 1630
Database
ISI
SICI code
0379-6779(1995)71:1-3<1629:SSOLBN>2.0.ZU;2-8
Abstract
The structure parameters of La1.93Bi0.07CuO4+delta (delta = 0.044, T-c = 22 K), which was made superconducting by treatment with O-2 at 50 M Pa and 600 degrees C, were refined by time-of-flight neutron powder di ffraction. It remained a single phase both at room temperature and at 11 K. Excess oxygen atoms are located at interstitial positions betwee n a couple of (La,Bi)O sheets. Localization of the interstitial oxygen defects by Bi3+ ions suppresses phase separation in this solid soluti on.