학술논문
Overdoped to underdoped Y{sub 0.8}Ca{sub 0.2}Ba{sub 2}Cu{sub 3}O{sub x}: {sup 170}Yb{sup 3+} Moessbauer probe measurements of electronic states and local Cu(2) magnetic order
Document Type
Journal Article
Author
Source
Journal of Low Temperature Physics; 117; 3-4; Conference: International Conference on Physics and Chemistry of Molecular and Oxide Superconductors, MOS'99, Stockholm (SE), 07/28/1999--08/02/1999; Other Information: PBD: Nov 1999
Subject
Language
English
ISSN
0022-2291
Abstract
The authors have used paramagnetic {sup 170}Yb{sup 3+} Moessbauer probes to examine two related properties of Y{sub 0.8}Ca{sub 0.2}Ba{sub 2}Cu{sub 3}O{sub x} as a function of the doping level. First, by measuring the low temperature thermal dependence of 1/T{sub 1}{sup (el)} of the probes in overdoped samples, they obtain information concerning the density of states below {Tc}. Second, by measuring the internal (molecular) field appearing on the probes in underdoped samples, they examine the fluctuating short range correlated Cu(2) magnetic order which is progressively introduced a the doping level is reduced. This magnetic order microscopically cohabits with superconductivity.