Magneto-electrique and magnetic studies of the Sr-doped Samarium manganite synthsesed by citrate gel method.

Type : Article de conférence
Auteur(s) :  E. Lakhal, A. Amira, R. Chihoub, S.P. Altintas, A. Varilci, C. Terzioglu
Année :  2016
Domaine : Sciences des matériaux
Conférence: 7th African Conference on Non Destructive Testing (ACNDT) & the 5th International Conference on NDT and Materials Industry and Alloys (IC-WNDT-MI)
Lieu de la conférence:  Oran, Algeria
Résumé en PDF :  (résumé en pdf)
Fulltext en PDF :  (.pdf)
Mots clés :  manganite, citrate, magnetotransport, Structure.

Résumé : 

In This paper we report study the effect of sintering temperature on the magnetotransport properties of Sm1-xSrxMnO (with x=0.3) manganite syntesized by citrate gel method. The Sm30.7Sr0.3MnO has been sintered at 700C (SSM7), 900C (SSM9) and 1300C (SSM13). XRD confirms that phase formation starts at 700C. All the samples are single phasic having orthorhombic unit cell. The lattice parameters decrease on lowering the sintering temperature. The crystallite as well asparticle size also show strong dependence on the sinteringtemperature. All the samples possess insulator-metal (TIM) aswell as paramagnetic-ferromagnetic (TC) transitions. The TCshows a small variation [274K to 256K]. The temperature causes a great increase of resistivity and lowers the temperature of the metal-insulator transition T3. Under applied magnetic field, a significant reduction in the resistivity and a shift of TP to higher temperatures values are observed. In the insulating region(T>T), the resistivity curves are well fitted by the small polaron hoping mechanism while in the metallic region (T