Investigation of electrical, magneto-dielectric and transport properties of multiferroic (1 − x) BiFeO3–(x) BaSr0.7Ti0.3O3 solid solutions
作者： Subhash Sharma , M. P. Cruz , J. M. Siqueiros , O. Raymond-Herrera , V. E. Alvarez
DOI: 10.1007/S10854-019-01058-W
关键词:
摘要: To date, many efforts are underway on single-phase multiferroic material to obtain a compound with strong magneto-dielectric coupling, improved dielectric properties and insulation behavior for their practical applications. In this work, high-quality powders of the (1 − x)BiFeO3(BFO)–(x)Ba0.7Sr0.3TiO3(BST) solid solutions were obtained by simple sol–gel assisted route. A detailed study interplay between dielectric, transport in ceramic samples is presented. Dielectric analysis reveals anomalies proximity Neel temperature, indicating small magneto-electric which was confirmed through capacitance versus magnetic field measurements. Analysis dc electrical response indicates no signature Poole Frenkel (PF) Schottky emission (SE) mechanism, but dominating space charge-limited conduction (SLCS) mechanism found studied samples. It demonstrated significant decrease current density increase BST concentration, suppressing oxygen vacancies presence leading an oxidation states stabilization Fe ions doping. The results ac conductivity suggest small-polarons hopping at low-temperature region followed ionized high-temperature region.
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