| Ca3Mn2O7 세라믹스의 전기전도 및 자기적 특성 |
| 정우환 |
| 호원대학교 조명학부 |
| Transport and Magnetic Properties of Ca3Mn2O7 ceramic |
| Woo-Hwan Jung |
| Division of Lighting, Howon University |
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| ABSTRACT |
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We present the results of a combined magnetization, dc and magneto-transport study of the n = 2 Ruddlesden-Popper compound $Ca_3Mn_2O_7$ The negative thermoelectric powder is observed. The magnetic measurement data show that there is sharp magnetic transition at 134 K. However, the de and magnetoresistance of $Ca_3Mn_2O_7$ show no particular transport. Transport properties of the compound $Ca_3Mn_2O_7$ are interpreted in terms of activated hopping of small polarons in non-adiabatic regime. Polarons are most probably formed around $Mn^{3+}$ sites created by oxygen sub-stoichiometry. |
| Key words:
Adiabatic, Non-adiabatic, Small polaron, Thermoelectric power |
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