PREPARATION, STRUCTURAL AND MAGNETIC-PROPERTIES OF ELECTRON-DOPED INFINITE-LAYER HTSC SR1-XNDXCUO2-DELTA

被引：0
|
作者：
MARKL, J
KLAUDA, M
FINK, C
SAEMANNISCHENKO, G
RAU, F
RANGE, KJ
BRUDERL, G
BURZLAFF, H
SEEMANN, R
机构：
[1] UNIV HAMBURG,INST EXPTL PHYS,W-2000 HAMBURG 13,GERMANY
[2] UNIV ERLANGEN NURNBERG,INST KRISTALLOG,W-8520 ERLANGEN,GERMANY
[3] UNIV REGENSBURG,INST ANORGAN CHEM,W-8400 REGENSBURG,GERMANY
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 1993年 / 195卷 / 1-2期
关键词：
D O I：
10.1016/0925-8388(93)90759-G
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
We present our method of fabricating superconducting compounds of the infinite-layer structure Sr1-xNdxCuO2-delta with various doping concentrations. The samples undergo a high temperature high pressure process and are then bulk superconductors without any further treatment. A slightly reducing atmosphere was necessary to get doped layer-phases. Refinement of the crystallographic data was done by a least squares method. The T(c)onset values are in the range of 36-41 K. The lower critical field H(c1)ab(T=0) is extrapolated to 15 G, while magnetization cycles show extremely weak pinning behaviour. From photoemission data a considerably diminished Cu-O-hybridisation is found. The particular shape of partial Nd-valence band spectra for these compounds shows Nd to work as a trivalent dopant for divalent Sr.
引用
收藏
页码：367 / 370
页数：4
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