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http://dx.doi.org/10.4191/KCERS.2002.39.3.294

Small Polaron Hopping Conduction of n=3 Ruddlesden-Popper Compound La2.1Sr1.9Mn3O10 System  

Jung, Woo-Hwan (Division of Electrical, Electronic and Information Engineering, Howon University)
Publication Information
Journal of the Korean Ceramic Society / v.39, no.3, 2002 , pp. 294-298 More about this Journal
Abstract
Polycrystalline $La_{2.1}Sr_{1.9}Mn_3O_{10}$ with layered perovskite structure have been successfully synthesized and investigated with respect to their thermoelectric, electric and magnetic properties. The large magnetoresistance (MR) effect with $-{\Delta}{\rho}/{\rho}_0$ of ∼120% at 0.85T was observed in a wide temperature range below a cusp temperature in resistivity of about 120K, which is well below the magnetic $T_C$. At high temperature, a singnificant difference between the activation energy deduced from the electrical resistivity and thermoelectric power, a characteristic of small polaron, is observed. All of the experimental data can be well explained on the basis of the small polaron model.
Keywords
Hopping; Jahn-Teller effect; Ruddlesden-Popper; Small polaron; Thermoelectric power;
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Times Cited By KSCI : 1  (Citation Analysis)
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