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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| Veröffentlicht in: | Физика низких температур |
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| Datum: | 2014 |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2014
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Zitieren: | 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| _version_ | 1862745431690182656 |
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| author | Ahmed, A.M. Mohamed, H.F. Šoka, M. |
| author_facet | Ahmed, A.M. Mohamed, H.F. Šoka, M. |
| 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. |
| collection | DSpace DC |
| container_title | 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.
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| first_indexed | 2025-12-07T20:40:27Z |
| format | Article |
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| id | nasplib_isofts_kiev_ua-123456789-119498 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 0132-6414 |
| language | English |
| last_indexed | 2025-12-07T20:40:27Z |
| publishDate | 2014 |
| publisher | Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
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| spelling | Ahmed, A.M. Mohamed, H.F. Šoka, M. 2017-06-07T05:45:30Z 2017-06-07T05:45:30Z 2014 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 https://nasplib.isofts.kiev.ua/handle/123456789/119498 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. The authors would like to thank Prof. Dr. Marcel Miglierini and Dr. Marius Pavlovic for they help in susceptibility measurements in Slovak University of Technology, Faculty of Electrical Engineering and Information Technology. en Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України Физика низких температур Низкотемпеpатуpный магнетизм Magnetic transitions and electrical transport in Bi-doped lanthanum strontium manganites Article published earlier |
| spellingShingle | Magnetic transitions and electrical transport in Bi-doped lanthanum strontium manganites Ahmed, A.M. Mohamed, H.F. Šoka, M. Низкотемпеpатуpный магнетизм |
| title | 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_short | Magnetic transitions and electrical transport in Bi-doped lanthanum strontium manganites |
| title_sort | magnetic transitions and electrical transport in bi-doped lanthanum strontium manganites |
| topic | Низкотемпеpатуpный магнетизм |
| topic_facet | Низкотемпеpатуpный магнетизм |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/119498 |
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