Temperature and magnetic field dependence of the coexistent phases in La1-xCaxMnO3+δ (x=0.47, 0.49)
Creators
- 1. Tohoku Univ., Institute for Materials Research, Sendai, Miyagi (Japan)
- 2. Iwate Univ., Faculty of Engineering, Morioka, Iwate (Japan)
Description
X-ray diffraction measurements under high and low temperature, and magnetic field have been performed for the doped La1-xCaxMnO3+δ polycrystals to clarify the coexistent phases and their structures around the composition of x - 0.5. By measurements at high temperature, the transition from a Pnma to an Imma space group symmetry phase has been firstly observed in this system at the temperature between 500degC and 600degC. At low temperature, the importance of the measurement of (131) reflection is noticed and the phase fraction of two similar Pnma phases with ferromagnetic and anti-ferromagnetic states is determined. It is found that the application of the magnetic field by 5 T and the slight change of the composition x by 0.02 remarkably affect this phase fraction. (author)
Additional details
Publishing Information
- Journal Title
- Journal of the Physical Society of Japan
- Journal Volume
- 72
- Journal Issue
- 4
- Journal Page Range
- p. 817-821
- ISSN
- 0031-9015
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 34044904
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- CALCIUM IONS; LANTHANUM IONS; MAGNETIC FIELDS; MAGNETIZATION; MANGANESE OXIDES; PEROVSKITES; PHASE TRANSFORMATIONS; POLYCRYSTALS; TEMPERATURE DEPENDENCE; X-RAY DIFFRACTION
- Descriptors DEC
- CHALCOGENIDES; CHARGED PARTICLES; COHERENT SCATTERING; CRYSTALS; DIFFRACTION; IONS; MANGANESE COMPOUNDS; MINERALS; OXIDES; OXYGEN COMPOUNDS; SCATTERING; TRANSITION ELEMENT COMPOUNDS
Optional Information
- Notes
- 16 refs., 8 figs.