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Radiation damage effects in CMR manganite materials |
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| Authors: | S. Chattopadhyay Sudipta Pal A. Sarkar Ravi Kumar B.K. Chaudhuri |
| Affiliation: | aDepartment of Physics, University of Calcutta, 92 Acharya Prafulla Chandra Road, Kolkata 700 009, India bDepartment of Solid State Physics, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700 032, India cDepartment of Physics, Bangabasi Morning College, 19 Rajkumar Chakraborty Sarani, Kolkata 700 009, India dNuclear Science Centre, Aruna Asaf Ali Marg, Post Box 10502, New Delhi 110 067, India |
| Abstract: | Polycrystalline La0.5Pb0.5Mn1−xCrxO3 (x = 0.075 and 0.15) samples have been irradiated with 50 MeV Li3+ ions with different fluences and the effects on the transport properties have been studied by means of the temperature and magnetic field dependent resistivity measurements. Due to Li3+ ion irradiation, the resistivity increases and the metal–insulator transition temperature (Tmi) decreases. At low temperatures (below Tmi), a dominant contribution of the electron–magnon scattering process is observed for all the irradiated and unirradiated samples. The low temperature resistivity behavior as well as the magnetoresistance is modified due to irradiation. The changes in the magnetotransport properties due to irradiation have been compared with the changes caused due to Mn site substitution. |
| Keywords: | Radiation damage CMR manganite |
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