Effect of Ca(Ce) doping on thermopower of LaMnO₃ manganites
With a view to explain the thermoelectric effects of La₀.₈Ca₀.₂MnO₃ and La₀.Ce₀.₂MnO₃ polycrystalline samples and to seek the role of scattering mechanism, a systematic investigation of thermopower S(T) in the metallic phase have been undertaken. Within the relaxation time approximation, it is notic...
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| Published in: | Физика низких температур |
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| Date: | 2010 |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2010
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| Online Access: | https://nasplib.isofts.kiev.ua/handle/123456789/117368 |
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| Journal Title: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Cite this: | Effect of Ca(Ce) doping on thermopower of LaMnO₃ manganites / D. Varshney, I. Mansuri, A. Yogi // Физика низких температур. — 2010. — Т. 36, № 7. — С. 790–796. — Бібліогр.: 19 назв. — англ. |
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Varshney, D. Mansuri, I. Yogi, A. 2017-05-22T15:50:04Z 2017-05-22T15:50:04Z 2010 Effect of Ca(Ce) doping on thermopower of LaMnO₃ manganites / D. Varshney, I. Mansuri, A. Yogi // Физика низких температур. — 2010. — Т. 36, № 7. — С. 790–796. — Бібліогр.: 19 назв. — англ. 0132-6414 PACS: 73.50.Lw, 74.25.Kc, 75.47.Gk, 75.47.Lx https://nasplib.isofts.kiev.ua/handle/123456789/117368 With a view to explain the thermoelectric effects of La₀.₈Ca₀.₂MnO₃ and La₀.Ce₀.₂MnO₃ polycrystalline samples and to seek the role of scattering mechanism, a systematic investigation of thermopower S(T) in the metallic phase have been undertaken. Within the relaxation time approximation, it is noticed that, the phonon drag S(T) with scattering of phonons from defects, grain boundaries, phonons and charge carriers in these samples are effective in the metallic regime. Later on, Mott expression is employed to incorporate the carrier diffusive thermopower. The temperature dependence of the S(T) is determined by competition among the several operating scattering mechanisms for the heat carriers and a balance between carrier diffusion and phonon drag contributions in the polycrystalline samples of La₀.₈Ca₀.₂MnO₃ and La₀.Ce₀.₂MnO₃. Authors are thankful to UGC– DAE CSR, Indore and to Dr. V. Ganesan for their support in carrying out thermopower measurements. Financial assistance from MPCST, Bhopal, India is also gratefully acknowledged. One of us IM acknowledges CSIR, New Delhi for the award of senior research fellowship. en Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України Физика низких температур Наноструктуры при низких температурах Effect of Ca(Ce) doping on thermopower of LaMnO₃ manganites Article published earlier |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine |
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| title |
Effect of Ca(Ce) doping on thermopower of LaMnO₃ manganites |
| spellingShingle |
Effect of Ca(Ce) doping on thermopower of LaMnO₃ manganites Varshney, D. Mansuri, I. Yogi, A. Наноструктуры при низких температурах |
| title_short |
Effect of Ca(Ce) doping on thermopower of LaMnO₃ manganites |
| title_full |
Effect of Ca(Ce) doping on thermopower of LaMnO₃ manganites |
| title_fullStr |
Effect of Ca(Ce) doping on thermopower of LaMnO₃ manganites |
| title_full_unstemmed |
Effect of Ca(Ce) doping on thermopower of LaMnO₃ manganites |
| title_sort |
effect of ca(ce) doping on thermopower of lamno₃ manganites |
| author |
Varshney, D. Mansuri, I. Yogi, A. |
| author_facet |
Varshney, D. Mansuri, I. Yogi, A. |
| topic |
Наноструктуры при низких температурах |
| topic_facet |
Наноструктуры при низких температурах |
| publishDate |
2010 |
| language |
English |
| container_title |
Физика низких температур |
| publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| format |
Article |
| description |
With a view to explain the thermoelectric effects of La₀.₈Ca₀.₂MnO₃ and La₀.Ce₀.₂MnO₃ polycrystalline samples and to seek the role of scattering mechanism, a systematic investigation of thermopower S(T) in the metallic phase have been undertaken. Within the relaxation time approximation, it is noticed that, the phonon drag S(T) with scattering of phonons from defects, grain boundaries, phonons and charge carriers in these samples are effective in the metallic regime. Later on, Mott expression is employed to incorporate the carrier diffusive thermopower. The temperature dependence of the S(T) is determined by competition among the several operating scattering mechanisms for the heat carriers and a balance between carrier diffusion and phonon drag contributions in the polycrystalline samples of La₀.₈Ca₀.₂MnO₃ and La₀.Ce₀.₂MnO₃.
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| issn |
0132-6414 |
| url |
https://nasplib.isofts.kiev.ua/handle/123456789/117368 |
| citation_txt |
Effect of Ca(Ce) doping on thermopower of LaMnO₃ manganites / D. Varshney, I. Mansuri, A. Yogi // Физика низких температур. — 2010. — Т. 36, № 7. — С. 790–796. — Бібліогр.: 19 назв. — англ. |
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AT varshneyd effectofcacedopingonthermopoweroflamno3manganites AT mansurii effectofcacedopingonthermopoweroflamno3manganites AT yogia effectofcacedopingonthermopoweroflamno3manganites |
| first_indexed |
2025-12-07T13:39:23Z |
| last_indexed |
2025-12-07T13:39:23Z |
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