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This work investigates the structural, dielectric, ferroelectric and magnetoelectric coupling properties of (1−x) LiNbO3 − (x) La0.9Na0.1MnO3 with x = 0.1, 0.2, and 0.3 nanocomposites. The composite of ferroelectric material LiNbO3 (LNB) and magnetic material La0.9Na0.1MnO3 (LNMO) was synthesized by the conventional solid-state reaction method. The X-ray diffraction study confirms the formation of the perovskite samples. The crystalline sizes of the samples increased with an increase in x. The improved properties of these composites by the addition of LNMO were investigated through various analysis methods. The composite with x = 0.3 exhibits the highest enhanced values of dielectric permittivity (ε′) and a.c. conductivity with the lowest activation energy Ea = 1.41 eV. The highest magnetoelectric coupling property is also observed for this concentration. This material has wide application in sensors, data storage devices and in pyroelectric applications. [ABSTRACT FROM AUTHOR]

In this work, we describe systematic studies on multiferroic composites (1−x) Bi Fe0.9Mn0.1O3/xLa0.7Sr0.3MnO3 (x = 0, 0.05, 0.1) synthesized via solid-state reaction route. Structural, dielectric, impedance, magnetic, magnetoelectric (ME), and optical properties were investigated at room temperature. X-ray diffraction (XRD) patterns show peaks corresponding to both Bi Fe0.9Mn0.1O3 (BMFO) and La 0.7Sr 0.3MnO3 (LSMO) phases and confirms the formation of composites. The frequency responses of dielectric constant and AC conductivity of the samples enhances with increasing content of LSMO and Nyquist plots have been investigated at room temperature. M–H loops at room temperature show enhancement in magnetization values on the addition of LSMO. Furthermore, the ME responses of the samples were analyzed and ME coupling coefficients were calculated for all the samples. Optical band gap and luminescence properties of the materials suggest their applications in optoelectronic devices. [ABSTRACT FROM AUTHOR]