Structural and Electrical Properties of Monovalent Doped Manganites Pr0.6Sr0.4-xKxMnO3 (x=0, 0.05 and 0.1)
Rachid Thaljaoui , W. Boujelben , M. Pekała , Krystyna Pękała , A. Cheikhrouhou
AbstractStructural and electrical properties of the mixed-valence monovalent doped manganites Pr0.6Sr0.4-xKxMnO3 (x=0, 0.05 and 0.1), prepared using the conventional solid-state synthesis method, have been investigated. Rietveld refinement of the X-ray diffraction patterns at room temperature shows a slight increase in unit cell volume with K content and confirms that all powder samples are single phase and crystallize in the orthorhombic structure with Pnma space group. Electrical resistivity measurements under and without magnetic field show a transition from the metallic to insulating behavior. The electrical conductivity is improved with increasing K content. The resistivity data in metallic region were fitted according to the electron-electron scattering process while in insulating region they were fitted using the small polaron hopping SPH model and Mott's variable range hopping VRH model. © 2012 Springer Science+Business Media New York.
|Journal series||Journal of Superconductivity and Novel Magnetism, ISSN 1557-1939|
|Keywords in English||Perovskite manganites, Magnetic properties, Magnetoresistance effect|
|Score|| = 15.0, 01-02-2020, ArticleFromJournal|
= 20.0, 01-02-2020, ArticleFromJournal
|Publication indicators||= 11; : 2013 = 0.635; : 2013 = 0.93 (2) - 2013=0.854 (5)|
|Citation count*||5 (2015-01-02)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.