Preparation, characterization and understanding of magnetoelectric transition metal oxides
Project goals
During recent years a great interest has been paid to multiferroic materials in which magnetic and ferroelectric orders not only coexist but are coupled. Magnetoelectrics attract attention primarily because of their potential technical applications in electronics. But materials that are both ferroelectric and magnetic are rare and only a part of them exhibits significant coupling between magnetic and electric order parameters. The challenge for basic and material research is to understand physical fundamentals of mechanisms responsible for the magneto-electric phenomena and to predict succesfully new or modified materials with suitable technological parameters. The known single phase multiferroics are mostly transition metal oxides. The magneto-electric effects have been observed for instance in some manganite or iron perovskites. Hexagonal ferrite of Y-type (Ba1-xSrx)2Zn2Fe12O22 is a new promising magnetoelectric system in which the existence of electric polarization is conditioned by the noncollin
Keywords
magnetismferroelectricitymagnetoelectric phenomenonmultiferroicstransition metal oxidesab initio calculationselectron structurehexaferrites
Public support
Provider
Ministry of Education, Youth and Sports
Programme
KONTAKT
Call for proposals
KONTAKT 6 (SMSM2008ME3)
Main participants
—
Contest type
VS - Public tender
Contract ID
2783/2009-32
Alternative language
Project name in Czech
Příprava, charakterizace a výklad vlastností magnetoelektrických oxidů přechodových kovů
Annotation in Czech
Získat nové poznatky o magnetoelektrických vlastnostech vybraných oxidů přechodových kovů a o jejich závislosti na technologii přípravy a tepelných úpravách vzorků. Vysvětlit experimentálně pozorované jevy na základě teoretických výpočtů.
Scientific branches
Completed project evaluation
Provider evaluation
V - Vynikající výsledky projektu (s mezinárodním významem atd.)
Project results evaluation
The project was devoted to preparation and characterization of single crystals and polycrystalline Y-type hexaferrites. It was proved that their magnetoelectric properties can be influenced by proper temperature treatment. Methods for determination of distribution of Zn and Fe cations on tetrahedral sites and oxygen stoichiometry were accomplished.
Solution timeline
Realization period - beginning
Jan 1, 2008
Realization period - end
Dec 31, 2009
Project status
U - Finished project
Latest support payment
Feb 24, 2009
Data delivery to CEP
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data delivery code
CEP10-MSM-ME-U/01:1
Data delivery date
Jun 30, 2010
Finance
Total approved costs
950 thou. CZK
Public financial support
950 thou. CZK
Other public sources
0 thou. CZK
Non public and foreign sources
0 thou. CZK
Recognised costs
950 CZK thou.
Public support
950 CZK thou.
0%
Provider
Ministry of Education, Youth and Sports
CEP
BM - Solid-state physics and magnetism
Solution period
01. 01. 2008 - 31. 12. 2009