Local configurations in ErBa2Cu3O6+x for 0.15≤x≤0.9

The NQR spectra of Cu in several ErBa2Cu3O6+x powder samples (0.1≤x≤0.9), characterized by particularly careful annealing, shows a limited number of frequency peaks. This fact is taken as evidence of a high degree of ordering of O(4) in the chain Cu(1) layer of the perovskite (formation of long full...

Descrición completa

Detalles Bibliográficos
Main Authors: Varotto, M, Amoretti, G, Bucci, C, De Renzi, R, Guidi, G, Jang, S, Radaelli, P, Segre, C
Formato: Journal article
Idioma:English
Publicado: 1994
Descripción
Summary:The NQR spectra of Cu in several ErBa2Cu3O6+x powder samples (0.1≤x≤0.9), characterized by particularly careful annealing, shows a limited number of frequency peaks. This fact is taken as evidence of a high degree of ordering of O(4) in the chain Cu(1) layer of the perovskite (formation of long full chains separated by empty chains as dictated by the stoichiometry), leading to a few regular patterns in the local configurations. © 1994.