"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."@en . "http://www.isvav.cz/projectDetail.do?rowId=ME08059"^^ . . . . " electron structure" . "2009-02-24+01:00"^^ . . . . . . " transition metal oxides" . "ME08059" . . " ab initio calculations" . " magnetoelectric phenomenon" . "2009-12-31+01:00"^^ . . . " multiferroics" . . "Preparation, characterization and understanding of magnetoelectric transition metal oxides"@en . "0"^^ . . . "4"^^ . "magnetism; ferroelectricity; magnetoelectric phenomenon; multiferroics; transition metal oxides; ab initio calculations; electron structure; hexaferrites"@en . . "2008-01-01+01:00"^^ . "4"^^ . "1"^^ . "2010-06-30+02:00"^^ . "P\u0159\u00EDprava, charakterizace a v\u00FDklad vlastnost\u00ED magnetoelektrick\u00FDch oxid\u016F p\u0159echodov\u00FDch kov\u016F" . "magnetism" . "1"^^ . "Z\u00EDskat nov\u00E9 poznatky o magnetoelektrick\u00FDch vlastnostech vybran\u00FDch oxid\u016F p\u0159echodov\u00FDch kov\u016F a o jejich z\u00E1vislosti na technologii p\u0159\u00EDpravy a tepeln\u00FDch \u00FAprav\u00E1ch vzork\u016F. Vysv\u011Btlit experiment\u00E1ln\u011B pozorovan\u00E9 jevy na z\u00E1klad\u011B teoretick\u00FDch v\u00FDpo\u010Dt\u016F." . "Projekt byl zam\u011B\u0159en na p\u0159\u00EDpravu a charakterizaci monokrystalick\u00FDch a polykrystalick\u00FDch hexaferit\u016F typu Y. Bylo prok\u00E1z\u00E1no, \u017Ee magnetoelektrick\u00E9 vlastnosti lze ovliv\u0148ovat vhodn\u00FDmi tepeln\u00FDmi \u00FApravami vzork\u016F. K metodick\u00FDm p\u0159\u00EDnos\u016Fm pat\u0159\u00ED postupy pro ur\u010Den\u00ED parametr\u016F distribuce kationt\u016F Zn a Fe v tetraedrick\u00FDch pozic\u00EDch a kysl\u00EDkov\u00E9 stechiometrie."@cs . . " ferroelectricity" . . . "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"@en .