Multiferroic properties of BiFeO3 /CoFe2O4 multilayers structure at room temperature

S. R. Flores, D. Barrionuevo, L. A. Silva
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Abstract

espanolLas peliculas multicapa BiFeO /CoFe O se depositaron mediante recubrimiento por rotacion sobre 32 4sustratos de Pt (Pt / TiO2 / SiO2 / Si) y se recocieron a 700, 725 y 750 ° C. El precursor de BiFeO /CoFe O 3 2 4 para la estructura de multicapas se sintetizo por el metodo de solucion quimica. Los patrones de difraccion de rayos X del sistema de multicapas revelaron la estructura de tipo compuesto. La corriente de fuga se encontro a menos de 10 Amp en el campo electrico por debajo de 100 kV / cm, que muestra el -6comportamiento ohmico de BiFeO /CoFe O . La constante dielectrica disminuye al aumentar en el rango de 3 2 4 frecuencia 103-106 Hz. El sistema BiFeO /CoFe O muestra la coexistencia de polarizacion ferroelectrica 32 4(Pr) = 65 y 51 μC / cm2 y magnetizacion (Mr) = 102 y 47 emu / cm3 a temperatura ambiente. Las respuestas ferromagneticas y ferroelectricas observadas en el sistema de multicapas pueden ser utiles para dispositivos bifuncionales. EnglishBiFeO /CoFe O multilayer films were deposited by spin coating on Pt (Pt/TiO2/SiO2/Si) substrates and 3 2 4 annealed at 700, 725 and 750 °C. The precursor of BiFeO /CoFe O for multilayers structure was 3 2 4 synthesized by chemical solution method. Patterns x-ray diffraction of the multilayers system revealed the composite-like structure. The leakage current was found less than 10-6 Amp at electric field below 100 kV/cm, which it shows the ohmic behavior of BiFeO /CoFe O . Dielectric constant decreases with increasing 3 2 4 in the frequency range 103-106 Hz. BiFeO /CoFe O system shows the co-existence of ferroelectric 3 2 4 polarization (Pr) = 65 and 51 μC/cm2 and magnetization (Mr) =102 and 47 emu/cm3 at room temperature. Observed ferromagnetic and ferroelectric responses in multilayers system may be useful for bi-functional devices.
室温下BiFeO3/CoFe2O4多层结构的多铁磁性
多层espanolLas电影BiFeO / CoFe或通过涂层rotacion对32 4sustratos缓、Pt (Pt / TiO2 / SiO2 /如果)和意识到700,725 7.5°c .前体BiFeO / CoFe或2 3 4结构multicapas sintetizo的方法简单的化学物质。多层系统的X射线衍射模式揭示了复合结构。在100 kV / cm以下的电场中,泄漏电流小于10安培,表现为BiFeO /CoFe O的-6欧姆行为。在103-106 Hz的频率范围内,介电常数随增加而减小。BiFeO /CoFe O体系在室温下表现出32 4(Pr) = 65和51 μC / cm2和102和47 emu / cm3磁化并存。在多层系统中观察到的铁磁和铁电响应可能对双功能器件有用。EnglishBiFeO /CoFe或多层薄膜通过旋转涂层沉积在Pt (Pt/TiO2/SiO2/Si)衬底上,并在700、725和750°C退火。The of BiFeO / CoFe先兆或was for multilayers structure 2 3 4 synthesized by chemical solution method。Patterns x-ray diffraction of the multilayers system revealed the composite-like结构。在100千伏/厘米以下的电场中发现的泄漏电流小于10-6安培,显示了BiFeO /CoFe O的欧姆行为。= =地理= =根据美国人口普查,该镇总面积为,其中土地和(1.6%)水。BiFeO /CoFe系统在室温下表现出铁电3 2 4极化(Pr) = 65和51 μC/cm2,磁化(Mr) =102和47 emu/cm3的共存。= =地理= =根据美国人口普查,这个县的面积为。
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