A systematic study on the effect of electron beam irradiationon structural,electrical,thermo-electric power and magnetic property of LaCoO3

Benedict, Christopher J and Rao, Ashok and Sanjeev, Ganesh and Okram, G S and Babu, P D (2016) A systematic study on the effect of electron beam irradiationon structural,electrical,thermo-electric power and magnetic property of LaCoO3. Journal of magnetism and Magnetic materials, 397. pp. 145-151. ISSN 0304-8853

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Abstract

In this communication, the effect of electron beam irradiation on the structural,electrical,thermo- electric power and magnetic properties of LaCoO3 cobaltites have been investigated.Rietvel drefinement of XRD data reveals that all samples are single phased withrhombohedral structure.Increase in electrical resistivity data is observed with increase indosageofelectronbeam irradiation. Analysis of theme asured electrical resistivity data indicates that the small polaronhoppingmodelisoperativeinthehightem- peratureregimeforallsamples.TheSeebeckcoefficient (S) of thepristineand the irradiated samples exhibitsacrossoverfrompositivetonegativevalues,andacolossalvalueofSeebeckcoefficient (32.65 mV/K)is obtained for pristine sample,however,thevalueof S decreases with increase indosage of irradiation. Thean alysis of Seebeckco efficient data confirms that the small polaronhoppingmodelis operative in the high temperature region.The magnetization results give clearevidence of increasein effective magnetic moment dueto increase in dosage of electron beam irradiation

Item Type: Article
Uncontrolled Keywords: Cobaltites,Thermoelectric power,Electron beamirradiation
Subjects: Engineering > MIT Manipal > Physics
Depositing User: MIT Library
Date Deposited: 08 Feb 2016 16:00
Last Modified: 08 Feb 2016 16:00
URI: http://eprints.manipal.edu/id/eprint/145205

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