Microstructure, magnetic and transport properties of the as-deposited <$E {roman La} sub 1-y {roman Ce} sub y roman MnO sub 3~( 0,1~symbol Г~y~symbol Г~0,3 )> films, prepared by a pulse laser deposition, have been investigated in wide region of temperature and magnetic field. The microstructure analysis reveals that all films have a high c-oriented texture, the orthorhombic crystal lattice and the negligible quantity of <$E roman CeO sub 2> inclusions. The observed strip-domain phase with a periodic spacing of about 3c, the crystal lattice of which is the same to the basic film phase, reveals the magnetic behavior typical for the Griffiths phase. The regions of the double-period modulated phase was found at room temperature in the y = 0,1 film, which are treated as the <$E roman {Mn sup 3+ "/" Mn sup 2+}> ordering with the partial ferromagnetic <$E symbol О> antiferromagnetic transition at <$E T sub N~symbol Г~80> K. At the same time, the carried out investigation manifests that the magnetic and transport properties of the electron-doped <$E {roman La} sub 1-y {roman Ce} sub y roman MnO sub 3> films, driven by a cation doping, are similar to that for the hole-doped La/Ca manganites. Therefore, one can conclude, that does not exist of a principle difference between the mechanisms of spin-ordering and charge-transport in the hole- and the electron-doped manganites.

Індекс рубрикатора НБУВ: В368.313

Рубрики:

Магнітні властивості надпровідників

Шифр НБУВ: Ж14063 Пошук видання у каталогах НБУВ 

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