ELOS 2023

Sara Ezairi

 Sara Ezairi, Speaker at Optics conferences
Hassan II University of Casablanca, Morocco
Title : Optical properties of Trivalent doped perovskite R1-xAxMnO3


The effect of gallium doping on the structural and optical properties of the La0.7K0.3Mn(1-x)GaxO3 (0≤x≤0.25) ceramics has been synthesized by pechini sol-gel method. The Rietveld refinements data revealed that all the samples have a rhombohedral structure with the space group R3 ?c. The SEM images recorded at different magnification levels reveal uniform grain shapes with flat surfaces .The optical properties indicated that the band gap of La0.7K0.3Mn(1-x)GaxO3 (0≤x≤0.25) ceramics was shifted from 3.2 to 3.08 eV with dopant concentration. These findings suggest that our material is highly preferred for practical applications like optoelectronic devices

Audience Take Away Notes :

  • Recently, numerous investigations have been carried out on the mixed valence manganese perovskite R1-xAxMnO3 (R refers to rare earth elements and A to alkali elements) due to its attractive properties like the colossal magnetoresistance (CMR) effect and possible applications in uncooled infrared bolometers,microelectronic devices ,magnetic refrigeration ,supercapacitors and magnetic sensors . 
  • In order to understand the relation between the structural, magnetic, electrical and optical properties and the CMR of manganites doped with non-magnetic ions. In this context, we want to know how the presence of a nonmagnetic metal (Ga3+) at the Mn site affects the structural and optical properties of the compounds obtained by the Pechini method.


Dr. Sara EZAIRI :Phd student in materials physics since October 2021 at Faculty of Sciences Ain Chock, Hassan II University of Casablanca, Morocco, she is working on nanomaterials by studying their optical, electrical and magnetocaloric properties in Laboratory for Advanced Materials Physics and Thermal in collaboration with Laboratory of Mechanics, Productics and Industrial Engineering .She has been contributed to 13 international conferences, and has been a member of the organizing committee of 3 conferences.