Etude des proprietes magnetiques, electriques et optiques des phases de structure perovskite SrVO2.90 et SrVO3

Physical properties of polycrystalline SrVO3−δ

“…The values of the Seebeck coefficient are negative in the whole temperature range, showing that the majority of charge carriers are electrons. The value of the Seebeck coefficient at room temperature obtained in the present study is in good agreement with the result of Dougier et al [16], which is well consistent with the results of the electrical resistivity. The absolute value of the Seebeck coefficient increases with the increasing temperature.…”

“…well consistent with the extrapolated data reported by Dougier et al [16]. However, the values obtained in the present study are lower than the literature data [17][18][19].…”

“…Fig. 4 shows the temperature dependence of the electrical resistivity ρ and the Seebeck coefficient S for SrVO 3−δ together with the literature data [16][17][18][19]. The electrical resistivity is of an order of magnitude of 10 −4 -10 −5 ( m), and shows positive temperature dependence, indicating metallic behavior.…”

“…4. Temperature dependence of the electrical resistivity and Seebeck coefficient for SrVO 3−δ [16][17][18][19].…”

Sharp metal-insulator transition in Sr(Ti1−xVx)O3−δ thin films on SrTiO3 substrates

“…We can expect the relation between thechargetransferandacertainphasetransitionoriginatedfrom the antiferromagnetic phase transition in vanadates with the perovskite structure. In a previous paper on the superlattices of SrVO 3 and SrTiO 3 we reported the anomalous nonlinear conduction with MI transition at about 150 K [9], in spite of metallic conduction in both SrTiO 3Àd [10] and SrVO 3 [11].…”