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

页码：367 / 370

页数：4

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