Prabakaran A/L Poopalan
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Prabakaran A/L Poopalan
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Prabakaran, A/L Poopalan
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Poopalan, P.
Poopalan, Prabakaran A.L.
Poopalan, Prabakaran
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7003686974

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Impact of annealing temperature on electrical properties of sol-gel Ba0.90Gd0.10TiO3 thin films

2023 , Ala'eddin Ahmad SAIF , Yen Chin TEH , Prabakaran A/L Poopalan

Ba0.90Gd0.10TiO3 (BGT) thin films have been fabricated in MFM configuration via sol-gel technique at the different annealing temperature. The dielectric parameters of the films are measured using Impedance Analyzer as a function of frequency. It is found that, at frequency 1 kHz, the measured value of e increases from 57 to 264 as the annealing temperature increases from 600 Â°C to 900 Â°C, which is correlated to the improved crystallinity and grain size increment. The ferroelectric hysteresis of the films is analyzed using Sawyer-Tower circuit that shows an enhancement for the ferroelectric properties with annealing temperature, which is also confirmed using C-V characteristics. The leakage current of the films is evaluated via Semiconductor Parameter Analyzer (SPA), which shows that at a certain electric field, the leakage current density increases as the annealing temperature increases, that is attributed to the crystallinity and grain size improvement. The conduction mechanism of the films is deeply investigated through different models to find out that the space charge limited conduction (SCLC) mechanism is the controlling conduction process.

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Frequency dependent electrical properties of ferroelectric Ba₀.₈Sr₀.₂TiO₃ thin film

1970 , Ala’eddin A. SAIF , Zul Azhar Zahid Jamal , Zaliman Sauli , Prabakaran A/L Poopalan

The frequency dependent electrical parameters, such as impedance, electric modulus, dielectric constant and AC conductivity for ferroelectric Baâ‚€.₈Srâ‚€.â‚‚TiO₃ thin film have been investigated within the range of 1 Hz and 106 Hz at room temperature. Z* plane shows two regions corresponding to the bulk mechanism and the distribution of the grain boundaries-electrodes process. M" versus frequency plot reveals a relaxation peak, which is not observed in the ε″ plot and it has been found that this peak is a non-Debye-type. The frequency dependent conductivity plot shows three regions of conduction processes, i. e., a low-frequency region due to DC conduction, a mid-frequency region due to translational hopping motions and a high-frequency region due to localized hopping and/or reorientational motion.http://dx.doi.org/10.5755/j01.ms.17.2.490

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