Barium doped and undoped Potassium Hydrogen Phthalate (KHP) crystals are grown by slow evaporation method under laboratory conditions. The XRD analysis confirmed the undoped and doped KHP crystallizes in orthorhombic structure with space group Pca21. The dielectric and conducting properties of 0.2 M% and 0.5 M% barium-doped KHP and undoped KHP crystals are studied. The dielectric constant found to decrease by \(83.5\) and \(96.6 \%\) for 0.2 M and 0.5 M% barium-doped KHP crystals compared to undoped KHP, respectively. The ratio of dielectric constant of 0.2 M% barium doped to undoped KHP crystal is observed to be 0.09 at 10 \(kHz\) and 0.02 for 0.5 M% barium-doped KHP crystal. The doping of barium in KHP reduces the dielectric loss significantly. The frequency dependence of AC conductivity described by \({\sigma }_{ac}\propto {\omega }^{n}\) , with the power \(n\) ranging between 0.499 and 0.163 for undoped and doped KHP crystals is observed. The inflexion point is found to be at 291.4 °C for undoped KHP, 290.3 °C for 0.2 M%-doped KHP and 290.9 °C for 0.5 M%-doped KHP crystals. The 0.5 M% barium-doped KHP crystal decomposes by 39.73% at the inflexion point which is slightly lesser compared to undoped (41.72%) and 0.2 M%-doped (40.83%) samples. Our studies show, the barium doping on KHP crystal can improve the performance and potentially influence dielectric properties. The investigations of barium doping on KHP crystals offers a pathway to dielectric and optical applications.
