Low-Doped La0.54Ho0.11Sr0.35Mn1-XVxO3 Manganites: Vanadium Influence on Transport Phenomena and Magnetic Properties

M.L. Craus; N. Cornei; T.L. To

doi:10.4028/www.scientific.net/SSP.190.85

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HomeSolid State PhenomenaSolid State Phenomena Vol. 190Low-Doped La0.54Ho0.11Sr0.35Mn1-XVxO3 Manganites:...

Low-Doped La_0.54Ho_0.11Sr_0.35Mn_1-XV_xO₃Manganites: Vanadium Influence on Transport Phenomena and Magnetic Properties

Abstract:

Transport phenomena in manganites (ABO₃), and indirectly the transition temperature from metallic to insulator state (T_MI), can be controlled by hole doping and the average ionic size at A positions (). In agreement with Zener theory, the strength of double exchange is determined by the Mn-O length (d_MnO) and Mn-O-Mn angles () of the Mn-O-Mn bonds. We will investigate the influence of substitution of Mn with V on the crystalline structure and transport characteristics in La_0.54Ho_0.11Sr_0.35Mn_1-xV_xO₃manganites. The samples were prepared by sol-gel method to improve the purity and homogeneity of the samples. By XRD it was established that the samples contain only ABO₃ perovskite phases, except the samples with x0.1. The resistance of the samples vs temperature was determined by four probes method. The specific magnetization was obtained by using a Foner type magnetometer, working at 1.4 T, between 77 and 400 K.