"4440"^^ . . . . . . "Perovskitov\u00E9 manganity Ln-(1-x)A(x)MnO(3) (Ln=La, Y nebo prvek vz\u00E1cn\u00FDch zemin, A= prvek alkalick\u00FDch zemin) se staly p\u0159edm\u011Btem zna\u010Dn\u00E9ho v\u00FDzkumn\u00E9ho \u00FAsil\u00ED d\u00EDky perspektiv\u011B sv\u00E9ho vyu\u017Eit\u00ED jako materi\u00E1l\u016F s kolos\u00E1ln\u00ED magnetoresistenci(CMR) nebo kovov\u00FDch vodi\u010D\u016F se spinov\u011B polarizovan\u00FDmi vodi\u010Di. Ned\u00E1vno vzbudily velk\u00FD z\u00E1jem neobvykl\u00E9 jevy f\u00E1zov\u00E9 separace, kter\u00E9 jsou pravd\u011Bpodobn\u011B zdrojem CMR vlastnost\u00ED. P\u0159edpokl\u00E1dan\u00FD projekt sleduje tento trend a zam\u011B\u0159uje se na separaci feromagnetick\u00FDch kovov\u00FDch oblast\u00ED v n\u011Bkter\u00FDch nevodiv\u00FDch manganitov\u00FDch syst\u00E9mech, \u0159\u00EDzenou m\u00EDrn\u00FDm dopov\u00E1n\u00EDm jin\u00FDmi tranzitivn\u00EDmi kovy v Mn-poloh\u00E1ch. S pou\u017Eit\u00EDm strukturn\u00EDch, magnetick\u00FDch, spektroskopick\u00FDch a elektrick\u00FDch transportn\u00EDch m\u011B\u0159en\u00ED, kombinovan\u00FDch s v\u00FDpo\u010Dty ab-initio a v\u00FDpo\u010Dty zalo\u017Een\u00FDmi na efektivn\u00EDm hamiltoni\u00E1nu, navrhovan\u00E9 studium usiluje o lep\u0161\u00ED porozum\u011Bn\u00ED mikroskopick\u00FDch interakc\u00ED p\u0159\u00EDm\u011Bsov\u00FDch iont\u016F s jejich okol\u00EDm."@cs . "1544"^^ . "Ferromagnetic phase separation in Mn-site doped perovskites (Ln, A)MnO3"@en . "Separace feromagnetick\u00E9 f\u00E1ze v perovskitech (Ln, A) MnO3 dopovan\u00FDch v Mn-poloh\u00E1ch"@cs . "11"^^ . "0"^^ . "11"^^ . . . "0"^^ . . . "magnetic oxides; colossal magnetoresistance; crystal structures; electric properties"@en . "1"^^ . "The perovskite manganites Ln(1-x)A(x)MnO(3)(Ln=La, Y or rare earth, A=alkaline earth) become subjects of considerable research effort because of their prospects as materials of colossal magnetoresistence (CMR) or metallic conductors with spin polarized carriers. Recently, much interest was attracted to unusual phase separation processes which seem to be at the root of the CMR properties. The present project follows this trend and focuses to separation of ferromagnetic metallic regions in various non-conducting manganite systems, controlled by a small doping on Mn sites with other transition metal ions. By means of the structural, magnetic, spectroscopic and electric transport experiments, combined with the ab inition and effective Hamiltonian based calculations, the proposed study aims to a better understanding of the microscopic interactions of dopant ions and their surroundings."@en . .