Effect of gadolinium dopant on structural, magneto-transport, magnetic and thermo-power of Pr0.8Sr0.2MnO3. (July 2018)

• Record Type: Journal Article
• Authors: Poojary, Thrapthi; Babu, P.D.; Sanil, Tejaswini; Daivajna, Mamatha D.
• Is Part Of: Solid state communications. Volume 275(2018)
• Page Start: 35
• Page End: 42
• Publication Date: 2018-07
• Subjects: A. Manganties -- D. Magneto-resistance -- E. Four probe method -- B. Solid state reaction; Solid state chemistry -- Periodicals; Solid state physics -- Periodicals; Chimie de l'état solide -- Périodiques; Physique de l'état solide -- Périodiques; 530.41
• DOI: 10.1016/j.ssc.2018.03.009
• Languages: English
• ISSNs: 0038-1098

Abstract

Abstract: In the present investigation structural, magneto-transport, magnetic and thermo-power measurements of Gadolinium (Gd) doped Pr0.8-x Gdx Sr0.2 MnO3 (0, 0.2, 0.25 and 0.3) manganites have been done. All the samples are single phased with orthorhombic structure. Temperature variation of resistance exhibits a high temperature transition occurring at 156 K and a low temperature cusp at around 95 K for pristine sample. With Gd doping resistance behavior shows insulating behavior throughout the whole temperature range. Magneto-Resistance (MR%) increases with Gd doping. A huge increase in thermo-electric power is observed with Gd doping. Highlights: Temperature variation of resistance exhibits a high temperature transition at 156 K and a low temperature cusp at 95K for pristine sample. With Gd doping resistance behavior shows insulating behavior throughout the whole temperature range. All samples including pristine compound remain insulating even at magnetic field of 9T. All the samples exhibit two transitions paramagnetic insulator (PMI) to ferromagnetic metal (FMM) transition at TC and FMM to antiferromagnetic insulator (AFI) transition at lower temperature TN from magnetic study. It is observed that TC decreases and TN increases with Gd doping. With Gd doping there is a huge increase in thermoelectric power