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Title: Heat capacity, thermopower and magnetoresistance effects in multiferroic La0.5Bi0.5Mn0.5Fe0.5O3
Authors: Jha, V.K.
Nautiyal, P.
Motin Seikh, M.
Chatterjee, R.
Mahendiran, R. 
Kundu, A.K.
Issue Date: Nov-2013
Citation: Jha, V.K., Nautiyal, P., Motin Seikh, M., Chatterjee, R., Mahendiran, R., Kundu, A.K. (2013-11). Heat capacity, thermopower and magnetoresistance effects in multiferroic La0.5Bi0.5Mn0.5Fe0.5O3. Journal of Materials Science 48 (21) : 7629-7634. ScholarBank@NUS Repository.
Abstract: We have carried out systematic investigations in perovskite multiferroic La0.5Bi0.5Mn0.5Fe0.5O3 by means of X-ray diffraction, magnetisation, electrical resistivity, thermoelectric and heat capacity measurements. The magnetic behaviour of this composition is rather complex, though the magnetisation curve seems to be like a weak ferromagnetic material. However, there is no clear evidence of λ-anomaly in the heat capacity data down to 2 K, yet this behaviour corroborate the trends of semiconducting silicon below room temperature. The sensitivity of magnetic behaviour to the iron-manganese ratio is also demonstrated. In presence of an external field of 7 T, it exhibits a magnetoresistance of -5 % at 130 K. The thermoelectric value increases linearly with decreasing temperature, and at room temperature the value is +85 μV/K, which is associated with the p-type polaronic conductivity. © 2013 Springer Science+Business Media New York.
Source Title: Journal of Materials Science
ISSN: 00222461
DOI: 10.1007/s10853-013-7580-6
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