| 저온에서의 La2.1Sr1.9Mn3O10 세라믹스의 열기전력 특성 |
| 정우환 |
| 호원대학교 디지털영상정보학부 |
| Low Temperature Thermoelectric Power Properties in La2.1Sr1.9Mn3O10 System |
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| ABSTRACT |
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Temperature dependent thermoelectric power (TEP) of La$_{2.1}$ Sr$_{1.9}$ Mn$_3$O$_{10}$ system has been studied in the temperature range 80-373 K. In the low temperature ferromagnetic regime, TEP (S) follows an expression of formS＝S$_{0}$ ＋S$_{1.5}$ T$^{1.5}$ ＋S$_4$T$^4$ over the wide range of temperature. The broad peak below the ferromagnetic transition and complicated temperature dependence of S may be understood on the basis of electron-magnon scattering as predicted for an itinerant ferromagnet. High temperature TEP data can be well fitted with Mott's small polaron hopping model. |
| Key words:
Electron-magnon scattering, Hopping, Small polaron, Thermoelectric power |
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