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Influence of yttrium dopant on the structure and electrical conductivity of potassium sodium niobate thin films

Mohd Hatta, Maziati Akmal and Abd Rashid, Mohd Warikh M. and Azlan, Umar Al Amani and Azmi, Nurul Azuwa and Azam, Mohd Asyadi and Moriga, Toshihiro (2016) Influence of yttrium dopant on the structure and electrical conductivity of potassium sodium niobate thin films. Materials Research, 19 (6). pp. 1417-1422. ISSN 1516-1439 E-ISSN 1980-5373

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KNN thin films with diverse yttrium concentration (mol % = 0, 0.1, 0.3, 0.5, 0.7 and 0.9) were fabricated using sol-gel spin coating technique. Doped KNN revealed that Y3+ was successfully doped into the ABO3 perovskite lattice without changing the phase formation of KNN. The thickness of the deposited layer of KNN produced with increasing dopant concentration was determined to be 200 nm with dense and well-defined grains. Afterwards, the vibrational bonding and conductivity of KNN films with diverse yttrium concentration were identified according to the charge compensation mechanism. At high dopant concentration of > 0.5 mol %, O-Nb-O bonding was asymmetric and became distorted due to B-site occupancy by yttrium dopant. Further investigation revealed that charge compensation mechanism was shifted by increasing doping concentration. As a result, yttrium-doped KNN became semi-conductive at low yttrium concentration. Meanwhile, at high concentration, yttrium-doped KNN became an insulator and underwent ionic compensation.

Item Type: Article (Journal)
Additional Information: 8252/67746
Uncontrolled Keywords: KNN, yttrium, thin film, doped, structural, conductivity
Subjects: Q Science > Q Science (General)
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Engineering
Depositing User: Dr Maziati Akmal
Date Deposited: 20 Jul 2023 09:14
Last Modified: 20 Jul 2023 09:14
URI: http://irep.iium.edu.my/id/eprint/105620

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