Ferromagnetic and dielectric properties of lead free KNbO3-CoFe2O4 composites

被引：20

作者：

Raja, S. ^{[1
]}

Vadivel, M. ^{[1
]}

Babu, R. Ramesh ^{[1
]}

Kumar, L. Sathish ^{[1
]}

Ramamurthi, K. ^{[2
]}

机构：

[1] Bharathidasan Univ, Dept Phys, Crystal Growth & Thin Film Lab, Tiruchirappalli 620024, Tamil Nadu, India

[2] Vinayaga Missions Res Fdn, Aarupadai Veedu Inst Technol, Dept Biomed Engn, Paiyanoor 603104, Tamil Nadu, India

来源：

SOLID STATE SCIENCES | 2018年 / 85卷

关键词：

Oxides; Synthesis; X-ray diffraction; Raman spectroscopy; Dielectric properties; Magnetic properties; HYDROTHERMAL SYNTHESIS; MAGNETIC-PROPERTIES; PHASE-TRANSITIONS; ROOM-TEMPERATURE; POLARIZATION; BEHAVIOR;

D O I：

10.1016/j.solidstatesciences.2018.09.008

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Multiferroic (1-x) KNbO3-(x) CoFe2O4 (x = 0.0, 0.25, 0.5, 0.75 and 1.0 mol) composites were prepared by solid state reaction method. X-ray diffraction results showed that the prepared (1-x) KNbO3-(x) CoFe2O4 composites belong to orthorhombic system for x = 0.0 (perovskite KNbO3), cubic system for x = 1.0 (spinel CoFe2O4) and mixed phase of KNbO3 and CoFe2O4 for x = 0.25, 0.5 and 0.75. Nb-O and Fe-O stretching vibrational modes were observed in the Fourier transform and Raman spectral analyses, respectively. The HR-SEM analysis showed that the morphology of KNbO3 and CoFe2O4 composites was significantly modified by CoFe2O4 content. Energy dispersive X-ray spectroscopy results confirmed the presence of K, Nb, Fe, Co and O in (1-x) KNbO3-(x) CoFe2O4 composites. The ionic state of Nb, Co, Fe and O was examined by X-ray photoelectron spectroscopy analysis. The high value of coercivity (H-c = -981Oe) for x = 0.5 and the enhanced dielectric constant for x = 0.5 and 0.75 were observed.

引用

页码：60 / 69

页数：10

共 36 条

[1] Magnetoelectric response in lead-free multiferroic NiFe2O4-Na0.5Bi0.5TiO3 composites [J].