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 |
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| Автори: | , , |
| Формат: | Стаття |
| Мова: | English |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2014
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| 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| id |
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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 |
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| first_indexed |
2023-10-18T20:34:41Z |
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2023-10-18T20:34:41Z |
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