Effect of high energy electron beam irradiation on the structural properties, electrical resistivity and thermopower of La0.5Sr0.5MnO3 manganites

Chettri, Pronita and Deka, Utpal and Rao, Ashok and Nagaraja, K K and Okram, G S and Petwal, V C and Verma, Vijay Pal and Dwivedi, Jishnu (2020) Effect of high energy electron beam irradiation on the structural properties, electrical resistivity and thermopower of La0.5Sr0.5MnO3 manganites. Physica B: Condensed Matter, 585. ISSN 0921-4526

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Abstract

Bulk samples of La0.5Sr0.5MnO3 manganite have been subjected to electron beam irradiation of different dosages. As a consequence, the structural and electronic transport properties viz resistivity and thermoelectric power are affected to some extent. The stoichiometric content of the sample is confirmed through Energy Dispersive X-ray spectroscopy. X-ray diffraction study of the samples (unexposed and exposed to electron beam radiation) show that the samples crystallize in a single phase rhombohedral structure. Insulating behavior is displayed in the temperature range 10–300 K investigation for all the samples. Temperature dependent thermoelectric power data reveals n-type conductivity in the entire temperature zone. At high temperatures, it is concluded through detailed analysis that both resistivity and thermopower conform to small polaron hopping model. On the other hand, variable range polaron hopping model elucidates the transport characteristics at low temperatures.

Item Type: Article
Uncontrolled Keywords: Electron beam irradiation X-ray diffraction Electrical resistivity Seebeck coefficient Polaron hopping
Subjects: Engineering > MIT Manipal > Physics
Depositing User: MIT Library
Date Deposited: 03 Sep 2020 09:00
Last Modified: 03 Sep 2020 09:00
URI: http://eprints.manipal.edu/id/eprint/155610

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