Published October 2007 | Version v1
Journal article Metadata-only

Magnetic microstructure and electrical properties of rare-earth Fe-substituted cuprates of the 8-8-20 type

Creators

  • 1. Kazanskij Gosudarstvennyj Univ., Kazan' (Russian Federation)
  • 2. Inst. Khimii Tverdogo Tela UrO RAN, Ekaterinburg (Russian Federation)

Description

Crystal structure, magnetic microstructure, and electrical properties of cuprates of rare-earth elements with a partial substitution of the atoms of strontium for rare-earth elements (REE) and iron for copper, i.e. Pr5.2Sr2.8Cu6.4Fe1.6O20, Nd5.2Sr2.8Cu6.4Fe1.6O20, Nd4.8Sr3.2Cu6.0Fe2O20 with a defective perovskite structure, have been investigated. The detailed analysis of the Moessbauer spectra of cuprates made it possible to assume that the substitution of strontium for REE in iron-substituted neodymium cuprates leads to a recharging of a portion of iron cations, and of lanthanide ions in praseodymium cuprates. The measurements of electrical conductivity and thermopower of the samples confirmed this assumption

Abstract (Russian)

Исследованы кристаллическая структура, магнитная микроструктура и электрические свойства купратов редкоземельных элементов с частичным замещением атомов редкоземельных элементов (РЗЭ) на стронций, а меди - на железо Pr5.2Sr2.8Cu6.4Fe1.6O20, Nd5.2Sr2.8Cu6.4Fe1.6O20, Nd4.8Sr3.2Cu6.0Fe2O20 со структурой дефектного перовскита. Детальный анализ мессбауэровских спектров купратов позволил предположить, что при замене РЗЭ на стронций в железо-замещенных купратах неодима происходит перезарядка части катионов железа, а в купратах празеодима - лантаноида. Измерения электропроводности и термоэдс образцов подтвердили это предположение

Additional details

Additional titles

Original title (Russian)
Магнитная микроструктура и электрические свойства редкоземельных Фе-замещенных купратов типа 8-8-20

Publishing Information

Journal Title
Fizika Metallov i Metallovedenie
Journal Volume
104
Journal Issue
4
Journal Page Range
p. 360-364
ISSN
0015-3230
CODEN
FMMEA9

Conference

Title
5. International conference on Moessbauer spectroscopy and its application
Original Conference Title
X Mezhdunarodnaya konferentsiya Messbauehrovskaya spektroskopiya i ee primenenie (ICMSA 2006)
Acronym
ICMSA 2006
Dates
18-24 Jun 2006
Place
Izhevsk (Russian Federation)

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
40088849
Subject category
S36: MATERIALS SCIENCE;
Resource subtype / Literary indicator
Conference
Descriptors DEI
CHEMICAL COMPOSITION; CUBIC LATTICES; CUPRATES; ELECTRIC CONDUCTIVITY; IRON COMPOUNDS; MAGNETIC SEMICONDUCTORS; MOESSBAUER EFFECT; NEODYMIUM COMPOUNDS; PRASEODYMIUM COMPOUNDS; STRONTIUM COMPOUNDS; THERMOELECTRIC PROPERTIES
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; COPPER COMPOUNDS; CRYSTAL LATTICES; CRYSTAL STRUCTURE; ELECTRICAL PROPERTIES; MATERIALS; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; SEMICONDUCTOR MATERIALS; TRANSITION ELEMENT COMPOUNDS

Optional Information

Notes
7 refs., 4 figs., 3 tabs.