Thermal and Dielectric Properties of EuF₃: Gd @ Tryptophan

Abstract EuF 3 : Gd @ tryptophan was synthesized via aqueous solution route at room temperature. The XRD studies shows hexagonal phase of synthesized nanoparticles with lattice parameters a = b = 6.966 (A°), c = 7.322 (A°). The lattice parameter values are in good agreement with (JCPDS card no 32-0373). The particle size of nanoparticles was calculated using Debye-Scherer formula and it is found to be 73.54 nm. Nanoparticles has flake like morphology having size of the order of 56 nm – 71 nm with nanoparticles has average size of 13 nm. The TEM image shows globular aggregates with assorted size were also seen with diameter 56 nm – 71 nm from which the flower like star structures originates. The TGA/DTA analyses of synthesized sample were studied up to 1500°C at heating rate of 0.01°C – 100°C/min. The variation in dielectric constant ε ′ , dielectric loss ε ″ and tangent loss (tan δ) with frequency (100 Hz – 5 MHz) was studied at room temperature. The dielectric constant and dielectric loss are found to decrease exponentially with frequency. The low value of dielectric loss at higher frequencies indicates its use in electronic industry.