Magnetic transitions and electrical transport in Bi-doped lanthanum strontium manganites

The temperature dependence of the electrical resistivity ρ, thermoelectric power S and the magnetic susceptibility χ of La₀.₇–xBixSr₀.₃MnO₃ (x = 0.05, 0.10, and 0.15 at.%) manganites were investigated. La₀.₇–xBixSr₀.₃MnO₃ crystallizes in a single phase rhombohedral structure with parasitic phase inc...

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Дата:2014
Автори: Ahmed, A.M., Mohamed, H.F., Šoka, M.
Формат: Стаття
Мова:English
Опубліковано: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2014
Назва видання:Физика низких температур
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Онлайн доступ:http://dspace.nbuv.gov.ua/handle/123456789/119498
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Назва журналу:Digital Library of Periodicals of National Academy of Sciences of Ukraine
Цитувати:Magnetic transitions and electrical transport in Bi-doped lanthanum strontium manganites / A.M. Ahmed, H.F. Mohamed, M. Šoka // Физика низких температур. — 2014. — Т. 40, № 5. — С. 539-544. — Бібліогр.: 32 назв. — англ.

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Digital Library of Periodicals of National Academy of Sciences of Ukraine
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spelling irk-123456789-1194982017-06-08T03:02:53Z Magnetic transitions and electrical transport in Bi-doped lanthanum strontium manganites Ahmed, A.M. Mohamed, H.F. Šoka, M. Низкотемпеpатуpный магнетизм The temperature dependence of the electrical resistivity ρ, thermoelectric power S and the magnetic susceptibility χ of La₀.₇–xBixSr₀.₃MnO₃ (x = 0.05, 0.10, and 0.15 at.%) manganites were investigated. La₀.₇–xBixSr₀.₃MnO₃ crystallizes in a single phase rhombohedral structure with parasitic phase inclusions. With increasing Bi concentration, a systematic decrease in the ferromagnetic transition temperature (TC), the metal–semiconducting transition temperature (Tms1) and also the values of activation energies Eρ and ES from ρ(T) and S(T) were observed. On the other hand, in the high-temperature (T > Tms) paramagnetic semiconductor regime, the adiabatic small polaron hopping model fit well, thereby indicating that polaron hopping might be responsible for the conduction mechanism. In addition, the thermoelectric power data at low temperatures were analyzed by considering both the magnon and the phonon drag concept, while the high-temperature data were confirmed a small polaron hopping conduction mechanism. 2014 Article Magnetic transitions and electrical transport in Bi-doped lanthanum strontium manganites / A.M. Ahmed, H.F. Mohamed, M. Šoka // Физика низких температур. — 2014. — Т. 40, № 5. — С. 539-544. — Бібліогр.: 32 назв. — англ. 0132-6414 PACS 71.27.+a, 75.30.Hx, 75.50.Ee http://dspace.nbuv.gov.ua/handle/123456789/119498 en Физика низких температур Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
institution Digital Library of Periodicals of National Academy of Sciences of Ukraine
collection DSpace DC
language English
topic Низкотемпеpатуpный магнетизм
Низкотемпеpатуpный магнетизм
spellingShingle Низкотемпеpатуpный магнетизм
Низкотемпеpатуpный магнетизм
Ahmed, A.M.
Mohamed, H.F.
Šoka, M.
Magnetic transitions and electrical transport in Bi-doped lanthanum strontium manganites
Физика низких температур
description The temperature dependence of the electrical resistivity ρ, thermoelectric power S and the magnetic susceptibility χ of La₀.₇–xBixSr₀.₃MnO₃ (x = 0.05, 0.10, and 0.15 at.%) manganites were investigated. La₀.₇–xBixSr₀.₃MnO₃ crystallizes in a single phase rhombohedral structure with parasitic phase inclusions. With increasing Bi concentration, a systematic decrease in the ferromagnetic transition temperature (TC), the metal–semiconducting transition temperature (Tms1) and also the values of activation energies Eρ and ES from ρ(T) and S(T) were observed. On the other hand, in the high-temperature (T > Tms) paramagnetic semiconductor regime, the adiabatic small polaron hopping model fit well, thereby indicating that polaron hopping might be responsible for the conduction mechanism. In addition, the thermoelectric power data at low temperatures were analyzed by considering both the magnon and the phonon drag concept, while the high-temperature data were confirmed a small polaron hopping conduction mechanism.
format Article
author Ahmed, A.M.
Mohamed, H.F.
Šoka, M.
author_facet Ahmed, A.M.
Mohamed, H.F.
Šoka, M.
author_sort Ahmed, A.M.
title Magnetic transitions and electrical transport in Bi-doped lanthanum strontium manganites
title_short Magnetic transitions and electrical transport in Bi-doped lanthanum strontium manganites
title_full Magnetic transitions and electrical transport in Bi-doped lanthanum strontium manganites
title_fullStr Magnetic transitions and electrical transport in Bi-doped lanthanum strontium manganites
title_full_unstemmed Magnetic transitions and electrical transport in Bi-doped lanthanum strontium manganites
title_sort magnetic transitions and electrical transport in bi-doped lanthanum strontium manganites
publisher Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
publishDate 2014
topic_facet Низкотемпеpатуpный магнетизм
url http://dspace.nbuv.gov.ua/handle/123456789/119498
citation_txt Magnetic transitions and electrical transport in Bi-doped lanthanum strontium manganites / A.M. Ahmed, H.F. Mohamed, M. Šoka // Физика низких температур. — 2014. — Т. 40, № 5. — С. 539-544. — Бібліогр.: 32 назв. — англ.
series Физика низких температур
work_keys_str_mv AT ahmedam magnetictransitionsandelectricaltransportinbidopedlanthanumstrontiummanganites
AT mohamedhf magnetictransitionsandelectricaltransportinbidopedlanthanumstrontiummanganites
AT sokam magnetictransitionsandelectricaltransportinbidopedlanthanumstrontiummanganites
first_indexed 2023-10-18T20:34:41Z
last_indexed 2023-10-18T20:34:41Z
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