Published 1999 | Version v1
Miscellaneous Open

Effect of isotope substitution on magnetic properties of manganites (La1-yPry)0.7Ca0.3MnO3

Creators

  • 1. RNTs Kurchatovskij Inst., Moscow (Russian Federation)
  • 2. OIYaI, Dubna (Joint Institute for Nuclear Research (JINR))
  • 3. Khimicheskij Fakul'tet MGU, Moscow (Russian Federation)
  • 4. NITs Prikladnykh Problem Ehlektrodinamiki RAN, Moscow (Russian Federation)
  • 5. Groningenskij Univ., Groningen (Netherlands)

Description

The unique peculiarities of perovskite structured manganites were largely estimated by electron-phonon interaction. Strong isotope effect is primarily dependent on this interaction. The essential changes in the magnetic structure of the (La1-yPry)0.7Ca0.3MnO3 system, phase diagram and its modification as a result of the oxygen isotopic exchange are discussed. The transfer properties were shown to be efficiently changed in the (La1-yPry)0.7Ca0.3MnO3 system during the isotope substitution 16O - 18O. At the concentration y=0.75 the oxygen isotope substitution gave rise to the low temperature metal-isolator transition

Abstract (Russian)

Уникальные особенности поведения манганитов со структурой перовскита в значительной мере определяются электрон-фононным взаимодействием. Наиболее характерным проявлением роли этого взаимодействия является сильный изотоп-эффект. Обсуждаются существенные изменения в магнитной структуре системы (La1-yPry)0.7Ca0.3MnO3, фазовая диаграмма и ее модификация в результате кислородного изотопического обмена. Было обнаружено, что в системе (La1-yPry)0.7Ca0.3MnO3 при изотопическом замещении 16O - 18O радикальным образом меняются транспортные свойства. При концентрации y=0.75 кислородное изотопическое замещение привело к низкотемпературному переходу металл-изолятор

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Part of:
4. All-Russian (international) scientific conference. Physicochemical processes during selection of atoms and molecules. Collection of reports

Additional details

Additional titles

Original title (Russian)
Влияние изотопного замещения на магнитные свойства манганитов (Ла

Publishing Information

Publisher
TsNIIatominform
Imprint Place
Moscow (Russian Federation)
Imprint Title
4. All-Russian (international) scientific conference. Physicochemical processes during selection of atoms and molecules. Collection of reports
Imprint Pagination
271 p.
Journal Page Range
p. 246-249
Report number
INIS-RU--465

Conference

Title
4. All-Russian (international) scientific conference. Physicochemical processes during selection of atoms and molecules
Original Conference Title
4. Vserossijskaya (mezhdunarodnaya) nauchnaya konferentsiya. Fiziko-khimicheskie protsessy pri selektsii atomov i molekul
Dates
4-8 Oct 1999
Place
Zvenigorod (Russian Federation)

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
34068132
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Resource subtype / Literary indicator
Conference
Descriptors DEI
CALCIUM COMPOUNDS; CUBIC LATTICES; ELECTRON-PHONON COUPLING; ISOTOPE EFFECTS; ISOTOPIC EXCHANGE; LANTHANUM COMPOUNDS; MAGNETIC PROPERTIES; MANGANESE COMPOUNDS; OXYGEN 16; OXYGEN 18; OXYGEN COMPOUNDS; PHASE DIAGRAMS; PRASEODYMIUM COMPOUNDS
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; COUPLING; CRYSTAL LATTICES; CRYSTAL STRUCTURE; DIAGRAMS; EVEN-EVEN NUCLEI; INFORMATION; ISOTOPES; LIGHT NUCLEI; NUCLEI; OXYGEN ISOTOPES; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; STABLE ISOTOPES; TRANSITION ELEMENT COMPOUNDS

Optional Information

Notes
7 refs.; 5 figs. Imprint:4. Vserossijskaya (mezhdunarodnaya) nauchnaya konferentsiya. Fiziko-khimicheskie protsessy pri selektsii atomov i molekul. Sbornik dokladov