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INTAS
 

 

Project Acronym INTAS
Title New layered 3d-materials for spintronics
Start date  2007-02-01
End date  2009-01-31
Programme IInternational Cooperation
Description

 

 

Spintronics (spin-based electronics), also known as magnetoelectronics, is an emergent technology making use of the electrons spin as well as of their charge. The search of new materials for spintronics is one of the main problems facing solid state physics and magnetism. Due to the features of a crystal structure, layered intercalated materials can be of great interest for spintronics. In this series of compounds the intercalation and cation substitution allow to create the substances with the electrical resistivity and magnetization controlled by chemical composition of a matrix. The phenomenon of the colossal magnetoresistance (CMR) was recently revealed in this class of substances (for instance, CMR of CuVxCr1-xS2 reaches - 40% in the magnetic field of 1 Tesla). The purpose of the present research is synthesis and study of new layered materials with colossal magnetoresistance capable to simplify the technology of fabrication of the multilayer structures. In the framework of this grant the new layered sulfides CuMexCr1-xS2 (Me = V, Fe; 0 < X < 0.3) and oxides MexPb3Mn7-xO15 (Me= Bi, Sr, Ru, Fe, Ga, Ti) will be synthesized and the complex study of their physical properties, as well as crystal, magnetic and electron structure will be carried out by state-of-the-art crystal investigation methods (for example, X-ray structural analysis, neutron diffraction, X-ray electronic spectroscopy).

 

Continued below .......



The totality of the results on electric, magnetostatic, magnetodynamic and galvanomagnetic properties in combination with data on crystal, magnetic and electronic structures of solid solutions of polycrystalline samples and single crystals will allow us to clarify the basic regularities of percolation and spin-dependent effects in layered intercalated structures and to give recommendations on the creation of new materials with the required physicotechnical parameters for spintronics. Therefore, the objectives of this proposal are to get information on the - crystal, electronic and magnetic structure of the new layered materials; - possibility of control of electron transport and physical properties of these materials by cation substitution and magnetic field; - main features and peculiarities of colossal magnetoresistance in intercalated and layered structures; - role of the degree of lattice ordering, stoichiometry and local neighborhood in the formation of compounds with high CMR values. The result of the research work will be phase diagrams describing the behavior of magnetic, electric and structural properties of the synthesized materials depending on the cation substitution degree, temperature and magnetic field. As we are making a strong effort on theoretical understanding of our experimental results, we expect not only to specify our systems investigated, but also to give essential input for the search of new materials.

 

Coordinator

 

 

 

IKIRENSKY INSTITUTE OF PHYSICS SB RAS

PHYSICS DEPARTMENT
AKADEMGORODOK

KRASNOYARSK
Russian Federation

Other partners

 INSTITUTE OF PHYSICS OF POLISH OF ACADEMY OF SCIENCE

POLAND

 INSTITUT LAUE-LANGEVIN (ILL)

 FRANCE

NIKOLAEV INSTITUTE OF INORGANIC CHEMISTRY Russian Federation
KIRENSKY INSTITUTE OF PHYSICS SB RAS Russian Federation

 

 


 

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