Structural evolution and dopant occupancy preference of yttrium-doped potassium sodium niobate thin films

Sodium potassium niobate (KNN) is the most promising candidate for lead-free piezoelectric material, owing to its high Curie temperature and piezoelectric coefficients among the non-lead piezoelectric. Numerous studies have been carried out to enhance piezoelectric properties of KNN through composit...

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Main Authors:	Mohd Hatta, Maziati Akmal, Abd Rashid, Mohd Warikh M., Azlan, Umar Al Amani, Azam, Mohd Asyadi, Anand, T. Joseph Sahaya, Moriga, Toshihiro
Format:	Article
Language:	English English English
Published:	Springer New York LLC 2016
Subjects:	Q Science (General)
Online Access:	http://irep.iium.edu.my/67745/ http://irep.iium.edu.my/67745/ http://irep.iium.edu.my/67745/ http://irep.iium.edu.my/67745/1/67745_Structural%20evolution%20and%20dopant.pdf http://irep.iium.edu.my/67745/2/67745_Structural%20evolution%20and%20dopant_SCOPUS.pdf http://irep.iium.edu.my/67745/3/67745_Structural%20evolution%20and%20dopant_WOS.pdf

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spelling	iium-677452019-05-24T00:59:12Z http://irep.iium.edu.my/67745/ Structural evolution and dopant occupancy preference of yttrium-doped potassium sodium niobate thin films Mohd Hatta, Maziati Akmal Abd Rashid, Mohd Warikh M. Azlan, Umar Al Amani Azam, Mohd Asyadi Anand, T. Joseph Sahaya Moriga, Toshihiro Q Science (General) Sodium potassium niobate (KNN) is the most promising candidate for lead-free piezoelectric material, owing to its high Curie temperature and piezoelectric coefficients among the non-lead piezoelectric. Numerous studies have been carried out to enhance piezoelectric properties of KNN through composition design. This research studied the effects of yttrium concentrations and lattice site occupancy preference in KNN films. For this research, the yttrium-doped KNN thin films (mol% = 0, 0.1, 0.3, 0.5, 0.7 and 0.9) were fabricated using the sol-gel spin coating technique and had revealed the orthorhombic perovskite structures. Based on the replacement of Y3+ ions for K+/ Na+ ions, it was found that the films doped with 0.1 to 0.5 mol% of yttrium had less lattice strain, while films with more than 0.5 mol% of Y3+ ions had increased strain due to the tendency of Y3+ to occupy the B-site in the perovskite lattice. Furthermore, by analysing the vibrational attributes of octahedron bonding, the dopant occupancy at A-site and B-site lattices could be identified. O-Nb-O bonding was asymmetric and became distorted due to the B-site occupancy of yttrium dopants at high dopant concentrations of >0.5 mol%. Extra conduction electrons had resulted in better resistivity of 2.153× 106 Ω at 0.5 mol%, while higher resistivity was recorded for films prepared with higher concentration of more than 0.5 mol%. The introduction of Y3+ improved the grain distribution of KNN structure. Further investigations indicated that yttrium enhances the surface smoothness of the films. However, at high concentrations (0.9 mol%), the yttrium increases the roughness of the surface. Within the studied range of Y3+ , the film with 0.5 mol% Y3+ represented a relatively desirable improvement in dielectric loss, tan δ and quality factor, Qm. Springer New York LLC 2016-12-01 Article PeerReviewed application/pdf en http://irep.iium.edu.my/67745/1/67745_Structural%20evolution%20and%20dopant.pdf application/pdf en http://irep.iium.edu.my/67745/2/67745_Structural%20evolution%20and%20dopant_SCOPUS.pdf application/pdf en http://irep.iium.edu.my/67745/3/67745_Structural%20evolution%20and%20dopant_WOS.pdf Mohd Hatta, Maziati Akmal and Abd Rashid, Mohd Warikh M. and Azlan, Umar Al Amani and Azam, Mohd Asyadi and Anand, T. Joseph Sahaya and Moriga, Toshihiro (2016) Structural evolution and dopant occupancy preference of yttrium-doped potassium sodium niobate thin films. Journal of Electroceramics, 37 (1-4). pp. 50-57. ISSN 1385-3449 E-ISSN 1573-8663 https://link.springer.com/article/10.1007/s10832-016-0039-9 10.1007/s10832-016-0039-9
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English English English
topic	Q Science (General)
spellingShingle	Q Science (General) Mohd Hatta, Maziati Akmal Abd Rashid, Mohd Warikh M. Azlan, Umar Al Amani Azam, Mohd Asyadi Anand, T. Joseph Sahaya Moriga, Toshihiro Structural evolution and dopant occupancy preference of yttrium-doped potassium sodium niobate thin films
description	Sodium potassium niobate (KNN) is the most promising candidate for lead-free piezoelectric material, owing to its high Curie temperature and piezoelectric coefficients among the non-lead piezoelectric. Numerous studies have been carried out to enhance piezoelectric properties of KNN through composition design. This research studied the effects of yttrium concentrations and lattice site occupancy preference in KNN films. For this research, the yttrium-doped KNN thin films (mol% = 0, 0.1, 0.3, 0.5, 0.7 and 0.9) were fabricated using the sol-gel spin coating technique and had revealed the orthorhombic perovskite structures. Based on the replacement of Y3+ ions for K+/ Na+ ions, it was found that the films doped with 0.1 to 0.5 mol% of yttrium had less lattice strain, while films with more than 0.5 mol% of Y3+ ions had increased strain due to the tendency of Y3+ to occupy the B-site in the perovskite lattice. Furthermore, by analysing the vibrational attributes of octahedron bonding, the dopant occupancy at A-site and B-site lattices could be identified. O-Nb-O bonding was asymmetric and became distorted due to the B-site occupancy of yttrium dopants at high dopant concentrations of >0.5 mol%. Extra conduction electrons had resulted in better resistivity of 2.153× 106 Ω at 0.5 mol%, while higher resistivity was recorded for films prepared with higher concentration of more than 0.5 mol%. The introduction of Y3+ improved the grain distribution of KNN structure. Further investigations indicated that yttrium enhances the surface smoothness of the films. However, at high concentrations (0.9 mol%), the yttrium increases the roughness of the surface. Within the studied range of Y3+ , the film with 0.5 mol% Y3+ represented a relatively desirable improvement in dielectric loss, tan δ and quality factor, Qm.
format	Article
author	Mohd Hatta, Maziati Akmal Abd Rashid, Mohd Warikh M. Azlan, Umar Al Amani Azam, Mohd Asyadi Anand, T. Joseph Sahaya Moriga, Toshihiro
author_facet	Mohd Hatta, Maziati Akmal Abd Rashid, Mohd Warikh M. Azlan, Umar Al Amani Azam, Mohd Asyadi Anand, T. Joseph Sahaya Moriga, Toshihiro
author_sort	Mohd Hatta, Maziati Akmal
title	Structural evolution and dopant occupancy preference of yttrium-doped potassium sodium niobate thin films
title_short	Structural evolution and dopant occupancy preference of yttrium-doped potassium sodium niobate thin films
title_full	Structural evolution and dopant occupancy preference of yttrium-doped potassium sodium niobate thin films
title_fullStr	Structural evolution and dopant occupancy preference of yttrium-doped potassium sodium niobate thin films
title_full_unstemmed	Structural evolution and dopant occupancy preference of yttrium-doped potassium sodium niobate thin films
title_sort	structural evolution and dopant occupancy preference of yttrium-doped potassium sodium niobate thin films
publisher	Springer New York LLC
publishDate	2016
url	http://irep.iium.edu.my/67745/ http://irep.iium.edu.my/67745/ http://irep.iium.edu.my/67745/ http://irep.iium.edu.my/67745/1/67745_Structural%20evolution%20and%20dopant.pdf http://irep.iium.edu.my/67745/2/67745_Structural%20evolution%20and%20dopant_SCOPUS.pdf http://irep.iium.edu.my/67745/3/67745_Structural%20evolution%20and%20dopant_WOS.pdf
first_indexed	2023-09-18T21:36:09Z
last_indexed	2023-09-18T21:36:09Z
_version_	1777412834343256064

Structural evolution and dopant occupancy preference of yttrium-doped potassium sodium niobate thin films

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