Published October 2005 | Version v1
Journal article Metadata-only

Electronic processes in anion-deficient perovskite-like SrFe1-xMxO3-y (M = Sc3+, Ga3+, Ti4+) ferrites

Creators

  • 1. Moskovskij Gosudarstvennyj Univ. im. M.V. Lomonosova, Moscow (Russian Federation)

Description

One investigated into effect of three-valent Sc3+, Ga3+ cations and of four-valent Ti4+ cation on cation distribution, ordering of oxygen vacancies and associated electron processes in SrFe1-xMxO3-y substituted strontium ferrites (M = Sc3+, Ga3+, Ti4+) of mixed valency with tetragonal strontium ferrite structure. One determined the local structure of Fe3+, Fe3.5+ and Fe4+ cations in the investigated ferrites. For SrFe1-xMxO3-γ (M = Sc3+, Ga3+, Ti4+) perovskite-like phases one revealed first-order phase transition within 250 deg C ≤ T ≤ 350 deg C temperature range associated with disordering of oxygen vacancies in their crystalline structure

Abstract (Russian)

Рассмотрено влияние трехвалентных катионов Sc3+, Ga3+ и четырехвалентного Ti4+ на катионное распределение, упорядочение кислородных вакансий и сопутствующие электронные процессы в замещенных ферритах стронция SrFe1-xMxO3-y (M = Sc3+, Ga3+, Ti4+) смешанной валентности со структурой тетрагонального феррита стронция. Определена локальная структура катионов Fe3+, Fe3.5+ и Fе4+ в исследуемых ферритах. Для перовскитоподобных фаз SrFe1-xMxO3-γ (M = Sc3+, Ga3+, Ti4+) обнаружен фазовый переход первого рода в интервале температур 250 град С ≤ Т ≤ 350 град С, связанный с разупорядочением кислородных вакансий в их кристаллической структуре

Additional details

Additional titles

Original title (Russian)
Электронные процессы в аниондефицитных ферритах SrFe

Publishing Information

Journal Title
Izvestiya Akademii Nauk. Rossijskaya Akademiya Nauk. Seriya Fizicheskaya
Journal Volume
69
Journal Issue
10
Journal Page Range
p. 1508-1513
ISSN
1026-3489
CODEN
IRAFEO

Conference

Title
9. International conference Moessbauer spectroscopy and its applications
Original Conference Title
IX Mezhdunarodnaya konferentsiya Messbauehrovskaya spektroskopiya i ee primeneniya
Dates
21-25 Jun 2004
Place
Ekaterinburg (Russian Federation)

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
38042905
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Resource subtype / Literary indicator
Conference, Numerical Data
Descriptors DEI
CRYSTAL-PHASE TRANSFORMATIONS; CUBIC LATTICES; ELECTRONS; EXPERIMENTAL DATA; GALLIUM ADDITIONS; IRON OXIDES; MOESSBAUER EFFECT; SCANDIUM ADDITIONS; SOLID SOLUTIONS; SPECTRA; STOICHIOMETRY; STRONTIUM COMPOUNDS; STRUCTURAL CHEMICAL ANALYSIS; TEMPERATURE RANGE 0400-1000 K; TITANIUM ADDITIONS; VALENCE
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; ALLOYS; CHALCOGENIDES; CRYSTAL LATTICES; CRYSTAL STRUCTURE; DATA; DISPERSIONS; ELEMENTARY PARTICLES; FERMIONS; GALLIUM ALLOYS; HOMOGENEOUS MIXTURES; INFORMATION; IRON COMPOUNDS; LEPTONS; MIXTURES; NUMERICAL DATA; OXIDES; OXYGEN COMPOUNDS; PHASE TRANSFORMATIONS; SCANDIUM ALLOYS; SOLUTIONS; TEMPERATURE RANGE; TITANIUM ALLOYS; TRANSITION ELEMENT ALLOYS; TRANSITION ELEMENT COMPOUNDS

Optional Information

Notes
25 refs., 3 figs., 1 tab.