Invertis Journals of Science & Technology

Bharat Singh ¹, Naresh Kumar ², Shammi Kumar ¹, Masroor Ahmad Bhat ³, Rajneesh Mohan ⁴, N. K. Gaur ³

Affiliations
1 Department of Physics, Govt. College for Women, Gandhi Nagar, Jammu-180008 (J&K), IN
2 Department of Physics, Sidharth Govt. College, Nadaun-177033 (H.P.), IN
3 Department of Physics, Barkatullah University, Bhopal-462026 (M.P.), IN
4 Central European Institute of Technology, BUT, Brno, CZ

Abstract

We have reported the results of resistivity behaviour of A_0.67Sr_0.33MnO₃, (A=Pr, Nd) manganites. The samples have been synthesised by solid state reaction method. These compounds are characterized for phase formation by using standard X-Ray diffraction (XRD) technique and low temperature resistivity versus temperature (R-T) measurement. The XRD patterns are indexed in orthorhombic unit cell (space group- Pnma) using Celref program. The absence of any impurity peak shows the monophasic nature of the prepared samples. The low temperature resistivitytemperature study show metal to insulator transition at 290 K and 250 K for Pr_0.67Sr_0.33MnO₃ and Nd_0.67Sr_0.33MnO₃ respectively. The resistivity properties are presented and discussed here in the light of the various conduction mechanisms of the prepared samples.

Keywords

Manganites, RT Behaviour, Curve Fitting.

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