Griffiths phases vs magnetic polarons in the lightly doped La1-x Sr x Mno3
- 1. Physics Faculty, Kazan State University, 420008 Kazan (Russian Federation) and EP V, Center for Electronic Correlations and Magnetism, University of Augsburg, 86135 Augsburg (Germany)
- 2. EP V, Center for Electronic Correlations and Magnetism, University of Augsburg, 86135 Augsburg (Germany)
Description
The nature of the ferromagnetic (FM)-paramagnetic (PM) transition in perovskite-doped manganites is the subject of considerable discussions. There is no general consensus about the microscopic physics of stable FM clusters within PM matrix for the temperature range around Curie temperature. Our measurements of electron-spin resonance and magnetic susceptibility in the system La1-x Sr x MnO3 (0.07≤x≤0.16) reveal a novel triangular Griffith's-phase regime, which arises as a result of the strong quenching of the randomly diluted locations of the FM bonds in the cooperatively Jahn-Teller-distorted orthorhombic structure. However, the Griffith's singularities disappear for x>0.16. In this case, an applicability of description based on magnetic polarons coupled on lattice distortions will be discussed
Additional details
Identifiers
- DOI
- 10.1016/j.jmmm.2006.10.913;
- PII
- S0304-8853(06)02134-2;
Publishing Information
- Journal Title
- Journal of Magnetism and Magnetic Materials
- Journal Volume
- 310
- Journal Issue
- 2
- Journal Page Range
- p. 1966-1968
- ISSN
- 0304-8853
- CODEN
- JMMMDC
Conference
- Title
- 17. international conference on magnetism
- Dates
- 20-25 Aug 2006
- Place
- Kyoto (Japan)
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 39022185
- Subject category
- S36: MATERIALS SCIENCE;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- CURIE POINT; DOPED MATERIALS; ELECTRON SPIN RESONANCE; MAGNETIC SUSCEPTIBILITY; MANGANESE COMPOUNDS; ORTHORHOMBIC LATTICES; OXIDES; PARAMAGNETISM; PEROVSKITE; POLARONS; QUENCHING; SINGULARITY; STRONTIUM COMPOUNDS
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; CHALCOGENIDES; CRYSTAL LATTICES; CRYSTAL STRUCTURE; MAGNETIC PROPERTIES; MAGNETIC RESONANCE; MAGNETISM; MATERIALS; MINERALS; OXIDE MINERALS; OXYGEN COMPOUNDS; PEROVSKITES; PHYSICAL PROPERTIES; QUASI PARTICLES; RESONANCE; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS; TRANSITION TEMPERATURE
Optional Information
- Copyright
- Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.