Published February 2005 | Version v1
Journal article Metadata-only

Moessbauer study of the nickelates ANi0.98Fe0.02O3 (A=Nd, Lu) in the region of the insulator-metal transition

Creators

  • 1. Moskovskij Gosudarstvennyj Univ. im. M.V. Lomonosova, Moscow (Russian Federation)
  • 2. Inst. Khimii Kondensirovannogo Sostoyaniya, Bordo (France)
  • 3. RAN, Inst. Problem Khimicheskoj Fiziki, Chernogolovka (Russian Federation)
  • 4. MGU, Inst. Yadernoj Fiziki, Moscow (Russian Federation)

Description

Hyperfine interaction of 57Fe probe atoms in the perovskite structures of NdNi0.98Fe0.02O3 and LuNi0.98Fe0.02O3 nickelates was shown to be associated with specificity of their local crystal structure. Measuring the Moessbauer spectra on both sides from the point of the insulator-metal phase transition (TM) made it possible to comprehensively study the dynamic behaviour of dopant iron atoms. Different models were considered to account for the abrupt change in the chemical shift of 57Fe atoms in the structure of NdNi0.98Fe0.02O3 at T≅TM (148 K)

Abstract (Russian)

Методом мессбауэровской спектроскопии исследованы сверхтонкие взаимодействия зондовых атомов 57Fe в структуре перовскитоподобных никелатов NdNi0.98Fe0.02O3 и LuNi0.98Fe0.02O3. Показано, что кардинальное различие спектров 57Fe двух никелатов связано с особенностями их локальной кристаллографической структуры. Измерение мессбауэровских спектров по обе стороны от температуры фазового перехода изолятор-металл (TИМ) позволило детально исследовать динамическое поведение примесных атомов железа. Рассмотрены различные модели, позволяющие объяснить резкое изменение химсдвига атомов 57Fe в структуре NdNi0.98Fe0.02O3 при T≅TИМ (148 K)

Additional details

Additional titles

Original title (Russian)
Мессбауэровское исследование никелатов ANi

Publishing Information

Journal Title
Zhurnal Neorganicheskoj Khimii
Journal Volume
50
Journal Issue
2
Journal Page Range
p. 287-293
ISSN
0044-457X
CODEN
ZNOKAQ

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
38002022
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
CRYSTAL STRUCTURE; ELECTRONIC STRUCTURE; IRON 57; IRON COMPOUNDS; LUTETIUM COMPOUNDS; NEODYMIUM COMPOUNDS; NICKELATES; PHASE TRANSFORMATIONS; STRUCTURAL CHEMICAL ANALYSIS; TEMPERATURE RANGE 0065-0273 K
Descriptors DEC
EVEN-ODD NUCLEI; INTERMEDIATE MASS NUCLEI; IRON ISOTOPES; ISOTOPES; NICKEL COMPOUNDS; NUCLEI; OXYGEN COMPOUNDS; RARE EARTH COMPOUNDS; STABLE ISOTOPES; TEMPERATURE RANGE; TRANSITION ELEMENT COMPOUNDS

Optional Information

Notes
28 refs., 7 figs., 1 tab.