Ferroelectric, dielectric, and optical properties of Nd-substituted Bi4Ti3O12 nanoparticles synthesized by sol-gel method

Progress in Natural Science: Materials International

D. Madhavan¹  V. Selvamurugan²  A. Marikani²  R. Krishnasharma²  S. Ravi²  P.V. Chandrasekar³  G. Mangamma⁴  M. Kamruddin⁴ 

[1] Department of Chemistry, Mepco Schlenk Engineering College, Sivakasi 626005, India;Department of Physics, Mepco Schlenk Engineering College, Sivakasi 626005, India;Institute of Optoelectronic Technology, Fuzhou University, Fuzhou 350 002, China;Surface & Nanoscience Division, Materials Science Group, Indira Gandhi Centre for Atomic Research (IGCAR), Kalpakkam 603102, India;

关键词: Nanostructures;    Sol-gel method;    X-ray diffraction;    Dielectric properties;    Photoluminescence;    Ferroelectric materials;   

DOI  :  10.1016/j.pnsc.2016.11.001

来源: DOAJ

【 摘 要 】

This paper reports the synthesis of neodymium substituted bismuth titanate nanoparticles (BNdT) for ferroelectric random access memory (FeRAM) based applications using sol-gel route. X-ray diffraction pattern showed that the BNdT nanoparticles exhibited perovskite structure with orthorhombic phase. The microstructure of the BNdT nanoparticles showed that the grains were in spherical structure with a bi-modal distribution of spheres. Dielectric constant and dielectric loss of BNdT nanoparticles were measured in the frequency range 100 Hz to 100kHz. Nd-substituted BNdT nanoparticles showed the high remanent polarization (Pr=33.2 μC/cm2, Ec=62.5 kV/cm) than pure bismuth titanate (BT) (Pr=14.6 μC/cm2, Ec=182.8 kV/cm) ideal for FeRAM based applications. The occurrence of red shift in photoluminescence (PL) spectrum is considered to be due to the isomerisation that may occur from the heating of samples.

【 授权许可】

Unknown