Dynamics of magnetic and electric parameters transformation in thin films of sodium-doped lanthanum manganites

Transformation dynamics of magnetic and electric parameters in thin films of sodium-doped lanthanum manganite has been studied. The peculiar feature of the films is wide temperature range of the coexistence of ferromagnetic and paramagnetic phases. It has been found that the anomalies on temperature...

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Бібліографічні деталі
Дата:2012
Автори: Pan'kiv, L.I., Tsmots, V.M., Pan'kiv, I.S., Matviyenko, A.I., Tovstolytkin, A.I.
Формат: Стаття
Мова:English
Опубліковано: НТК «Інститут монокристалів» НАН України 2012
Назва видання:Functional Materials
Теми:
Онлайн доступ:http://dspace.nbuv.gov.ua/handle/123456789/135288
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Назва журналу:Digital Library of Periodicals of National Academy of Sciences of Ukraine
Цитувати:Dynamics of magnetic and electric parameters transformation in thin films of sodium-doped lanthanum manganites / L.I. Pan'kiv, V.M. Tsmots, I.S. Pan'kiv, A.I. Matviyenko, A.I. Tovstolytkin // Functional Materials. — 2012. — Т. 19, № 2. — С. 172-177. — Бібліогр.: 32 назв. — англ.

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Digital Library of Periodicals of National Academy of Sciences of Ukraine
Опис
Резюме:Transformation dynamics of magnetic and electric parameters in thin films of sodium-doped lanthanum manganite has been studied. The peculiar feature of the films is wide temperature range of the coexistence of ferromagnetic and paramagnetic phases. It has been found that the anomalies on temperature dependences of magnetization, electric resistance and magnetoresistance are shifted relative to each other contrary to the case of doped manganite single crystals, in which such anomalies are observed at almost the same temperature. Based on the magnetic measurements data and theoretical calculations, the dependence of ferromagnetic phase volume fraction Vfm on the temperature has been calculated. Vfm values have been calculated whereby maximums on temperature dependences of electric resistance and magnetoresistance have been observed. Conclusions have been formulated concerning the shape of ferromagnetic nuclei in the films under consideration.