Published May 2001 | Version v1
Journal article Metadata-only

A high-temperature X-ray powder diffraction study of Nd2-xCexCuO4±y (x = 0; 0.15) in a helium atmosphere

Creators

  • 1. UrO RAN, Inst. Metallurgii, Ekaterinburg (Russian Federation)

Description

The temperature dependences of elementary cell parameters were obtained by means of high-temperature X-ray diffraction at heating of T'-phase samples of Nd2-xCexCuO4±y (x = 0; 0.15) composition in helium atmosphere from room temperature up to 1050 Deg C. Physicochemical processes attendant on every stage of synthesis and leading to formation of phases with properties of high-temperature superconductors have been revealed. Possible mechanism of the change processes between different oxygen positions in the structure of T'-phase at the final stage of high-temperature superconductors formation with the Nd1.85Ce0.15CuO4-y composition is discussed in the context of current views on the effect of intrastructural oxygen disorder on the character of these dependence

Abstract (Russian)

Методом высокотемпературной рентгенографии получены температурные зависимости параметров элементарной ячейки при нагревании образцов Т'-фазы состава Nd2-xCexCuO4±y (x = 0; 0.15) в атмосфере гелия от комнатной температуры до 1050 град С. Выявлены физико-химических процессы, сопровождающие каждую стадию синтеза и ведущие к образованию фаз со свойствами высокотемпературных сверхпроводников. В рамках существующих представлений о влиянии внутриструктурного кислородного разоупорядочения на характер этих зависимостей обсуждается возможный механизм процессов обмена между различными кислородными позициями структуры Т'-фазы на заключительной стадии формирования фазы высокотемпературных сверхпроводников состава Nd1.85Ce0.15CuO4-y

Additional details

Additional titles

Original title (Russian)
Терморентгенографическое изучение Нд

Publishing Information

Journal Title
Zhurnal Neorganicheskoj Khimii
Journal Volume
46
Journal Issue
5
Journal Page Range
p. 709-714
ISSN
0044-457X
CODEN
ZNOKAQ

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
33019020
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
CERIUM COMPOUNDS; CHEMICAL COMPOSITION; CUPRATES; HELIUM; HIGH-TC SUPERCONDUCTORS; INERT ATMOSPHERE; LATTICE PARAMETERS; NEODYMIUM COMPOUNDS; PHASE STUDIES; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0273-0400 K; TEMPERATURE RANGE 0400-1000 K; TEMPERATURE RANGE 1000-4000 K; X-RAY DIFFRACTION
Descriptors DEC
ATMOSPHERES; COHERENT SCATTERING; CONTROLLED ATMOSPHERES; COPPER COMPOUNDS; DIFFRACTION; ELEMENTS; FLUIDS; GASES; NONMETALS; OXYGEN COMPOUNDS; RARE EARTH COMPOUNDS; RARE GASES; SCATTERING; SUPERCONDUCTORS; TEMPERATURE RANGE; TRANSITION ELEMENT COMPOUNDS; TYPE-II SUPERCONDUCTORS

Optional Information

Notes
10 refs., 2 figs., 1 tab.