Objective
The project is aimed at revealing the main characteristic features of inhomogeneous states of different types (superstructures, stripes, random percolation networks) in doped magnetic oxides, notably in CMR manganites, using in particular the isotope effects in them. Isotope substitution allows one to "gently" influence the properties of corresponding compounds without changing the chemical composition, and at the same time it is capable to profoundly modify the state of these systems. The complex study of isotope effects for different type of systems (polycrystals, films, artificial structures) using various experimental techniques (structural studies by X-ray diffraction, neutron scattering, and electron microscopy; transport and magnetic measurements; study of ESR and NMR on La, Mn, 17O; optical investigations) would allow us to obtain a comprehensive picture of the behaviour of these systems, in particular, the role played by electron-lattice interactions and polaron effects, which apparently are crucial in determining the structure and properties in inhomogeneous states.
According to these goals the research will be focused on the following tasks:
(i) analysis of different types of phase separation and charge/orbital ordering in complex magnetic oxides;
(ii) the study of the isotope effect in the systems with phase separation;
(iii) manufacturing and investigation of artificial inhomogeneous structures.
The performing of these tasks will involve:
- synthesis of mixed rare-earth manganites and related perovskite-like oxides and preparation of the samples in the form of single crystals, epitaxial films, pellets, powders, and artificial superstructures;
- oxygen isotope substitution of the samples (using both 18O and 17O);
- characterization of crystal and magnetic structure of the samples and their homogeneity by X-ray diffraction, electron microscopy, neutron scattering, muon spectroscopy, and optical methods;
- NMR (17O, 55Mn, 139La) and ESR studies of inhomogeneous states;
- measurements of dc conductivity, current-voltage characteristics, ac magnetic susceptibility, and dc magnetization as function of temperature and magnetic field with the emphasis on the isotope effect and especially on the metal-insulator transition induced by the isotope substitution;
- interpretation of experimental data in the framework of microscopic models accounting for the electron-lattice coupling (manifesting itself in large isotope effect), strong electron correlations resulting in the interplay of charge, orbital, and magnetic ordering, as well as in phase separation.
As a result, it is expected to produce a set of magnetic oxides exhibiting different kinds of inhomogeneous states, to find out the local structure of such states, to reveal the effect of isotope substitution on the phase diagrams and transport properties. These results should provide a clue to microscopic nature of intrinsic inhomogeneities and the giant isotope effect in doped magnetic oxides with competing order parameters in the situation with strong electron-electron correlations accompanied by pronounced electron-lattice coupling.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
This project has not yet been classified with EuroSciVoc.
Be the first one to suggest relevant scientific fields and help us improve our classification service
You need to log in or register to use this function
Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Data not available
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Funding Scheme
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Data not available
Coordinator
14050 Caen Cedex
France
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.