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http://dx.doi.org/10.4191/KCERS.2005.42.9.613

Transport and Magnetic Properties of Ca3Mn2O7 ceramic  

Jung, Woo-Hwan (Division of Lighting, Howon University)
Publication Information
Journal of the Korean Ceramic Society / v.42, no.9, 2005 , pp. 613-617 More about this Journal
Abstract
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.
Keywords
Adiabatic; Non-adiabatic; Small polaron; Thermoelectric power;
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Times Cited By KSCI : 1  (Citation Analysis)
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