TY - JOUR
T1 - Analytical electron microscopy of high-Tc superconductors in the (Bi, Pb)-Ca-Sr-Cu-O system
AU - Shindo, Daisuke
AU - Sato, Hiroshi
AU - Liedl, Gerald L.
AU - Hiraga, Kenji
AU - Kobayashi, Norio
AU - Hirabayashi, Makoto
AU - Muto, Yoshio
PY - 1989/3
Y1 - 1989/3
N2 - Superconductors in the Bi-Ca-Sr-Cu-O system containing a small amount of Pb were investigated by analytical electron microscopy as well as high-resolution electron microscopy. X-ray spectroscopy analysis showed that most of grains in the samples contain approximately the same amount of Pb, and the compositions of the grains with the low-Tc (60 K) phase correspond to (Bi, Pb)1.1(Ca, Sr)1.4Cu1.0Ox. The compositions of the samples containing high-Tc phase differ from grain to grain but indicate higher Cu atomic fraction than that of the low-Tc phase. High resolution electron microscope images directly reveal the modulated structure along the [010] direction with an incommensurate period which is the same as that observed in Bi-Ca-Sr-Cu-O. Electron energy loss spectra were also investigated by means of parallel detection system. The position and shape of the strong peak above the threshold at the oxygen K-edge were discussed relative to data for YBa2Cu3Ox.
AB - Superconductors in the Bi-Ca-Sr-Cu-O system containing a small amount of Pb were investigated by analytical electron microscopy as well as high-resolution electron microscopy. X-ray spectroscopy analysis showed that most of grains in the samples contain approximately the same amount of Pb, and the compositions of the grains with the low-Tc (60 K) phase correspond to (Bi, Pb)1.1(Ca, Sr)1.4Cu1.0Ox. The compositions of the samples containing high-Tc phase differ from grain to grain but indicate higher Cu atomic fraction than that of the low-Tc phase. High resolution electron microscope images directly reveal the modulated structure along the [010] direction with an incommensurate period which is the same as that observed in Bi-Ca-Sr-Cu-O. Electron energy loss spectra were also investigated by means of parallel detection system. The position and shape of the strong peak above the threshold at the oxygen K-edge were discussed relative to data for YBa2Cu3Ox.
KW - Analytical electron microscopy
KW - Electron energy loss spectroscopy
KW - High-T
KW - High-T superconductor
KW - Low-T phase
KW - Parallel detection system Bi-Pb-Ca-Sr-Cu-O
UR - http://www.scopus.com/inward/record.url?scp=0024628896&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0024628896&partnerID=8YFLogxK
U2 - 10.1143/JJAP.28.L415
DO - 10.1143/JJAP.28.L415
M3 - Article
AN - SCOPUS:0024628896
VL - 28
SP - L415-L418
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
SN - 0021-4922
IS - 3 A
ER -