Liu Yi, Zhong Liyun, Cai Jiye, Tang Honggao, Chen Meiling, Wu Chenjiu, Li Xiaoge, Sun Yuping, Du Jiaju. STUDY OF RAMAN SPECTRA FROM Bi(Pb)-Sr-Ca-Cu-O[J]. Chinese Journal of Luminescence, 1991,12(2): 127-133
Liu Yi, Zhong Liyun, Cai Jiye, Tang Honggao, Chen Meiling, Wu Chenjiu, Li Xiaoge, Sun Yuping, Du Jiaju. STUDY OF RAMAN SPECTRA FROM Bi(Pb)-Sr-Ca-Cu-O[J]. Chinese Journal of Luminescence, 1991,12(2): 127-133DOI:
a great deal of efforts has been made to study the structure and electronic properties of superconducting phases. The di cussion on Raman spectra of high-
T
c
superconductor aims to clarify the feature of phone structure and to gain information on physical properties of material. Much research work has been done on Raman spectra of Bi-Sr-Ca-Cu-O systeem while a little on Pb-doped Bi-Sr-Ca-Cu-O system.This paper discusses the similarities and differences of Raman spectra from (2212) single crystal (
T
c
=85K
sp1)
Pb doped (2223) phase (
T
c
=107K
sp
2
) and Pb-doped Bi-Sr-Ca-Cu-O nonsuperconductor which is amorphous solid (sp
3
). The spectra involve in 20-720cm
-1
. Raman spectra were excited by an argon laser (λ=514.5nm) and detected by Model SPEX-140 Raman Spectrometer with a resolution of 4cm
-1
. AⅡ the experiments were carried out at room temperature.The lines of 169
456-466 and 631-650cm
-1
only occur in the spectra of sp
1
and sp
2
. The spectrum of sp
3
is quite different from those of sp
1
and sp
2
either in the location of lines or the structure of spectrum
which suggests the structure disparity. The most unambiguous character is that high intensity lines are always narrow