Anomalous dielectric constant and AC conductivity in mixed transition-metal-ion xFe2O3-(20 - x)MnO2-80TeO2 glass system
Glasses with xFe2O3–(20−x)MnO2–80TeO2 (x=2, 5, 10, 15, and 20 mol%) composition were prepared by meltquenching technique to investigate the effects of mixed-transition metal ion Fe2 +/3 +//Mn3 +/4 + on AC conductivity and dielectric properties using impedance spectroscopy. Dielectric constant showed...
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| Format: | Article |
| Language: | English |
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American Scientific Publishers
2016
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| Online Access: | http://psasir.upm.edu.my/id/eprint/55068/1/Anomalous%20dielectric%20constant%20and%20AC%20conductivity%20in%20mixed%20transition-metal-ion.pdf |
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| author | Hisam, Rosdiyana Yahya, Ahmad Kamal Mohamed Kamari, Halimah Talib, Zainal Abidin Yahaya Subban, Ri Hanum |
| author_facet | Hisam, Rosdiyana Yahya, Ahmad Kamal Mohamed Kamari, Halimah Talib, Zainal Abidin Yahaya Subban, Ri Hanum |
| author_sort | Hisam, Rosdiyana |
| collection | UPM |
| description | Glasses with xFe2O3–(20−x)MnO2–80TeO2 (x=2, 5, 10, 15, and 20 mol%) composition were prepared by meltquenching technique to investigate the effects of mixed-transition metal ion Fe2 +/3 +//Mn3 +/4 + on AC conductivity and dielectric properties using impedance spectroscopy. Dielectric constant showed strong variation with Fe2O3 at a frequency ≥10 kHz, where έ decreased to a minimum value at x =10 mol% before increasing for x> 10%. The decrease in έ may be attributed to some form of hindrance effect on heavy dipoles caused by the mixed transition-ion effect (MTE). Meanwhile, variation of AC conductivity with Fe2O3 showed non-linear increase for x ≤ 10 mol% before dropping to a minimum at 15 mol% Fe2O3. This result was attributed to Anderson localization because of the disorder in the glass system. Conductivity analysis showed that the conduction mechanism at the dispersion region for x = 2 mol% followed the correlated barrier hopping (CBH) model, while the mechanism transformed to the overlapping large polaron tunnelling (OLPT) model at higher Fe2O3, content (x > 2 mol%). The electric modulus of the investigated samples showed asymmetric peak of the imaginary part of electric modulus (M¢¢), which reflected a non-Debye type relaxation. |
| first_indexed | 2024-03-06T09:22:21Z |
| format | Article |
| id | upm.eprints-55068 |
| institution | Universiti Putra Malaysia |
| language | English |
| last_indexed | 2024-03-06T09:22:21Z |
| publishDate | 2016 |
| publisher | American Scientific Publishers |
| record_format | dspace |
| spelling | upm.eprints-550682018-07-13T08:55:38Z http://psasir.upm.edu.my/id/eprint/55068/ Anomalous dielectric constant and AC conductivity in mixed transition-metal-ion xFe2O3-(20 - x)MnO2-80TeO2 glass system Hisam, Rosdiyana Yahya, Ahmad Kamal Mohamed Kamari, Halimah Talib, Zainal Abidin Yahaya Subban, Ri Hanum Glasses with xFe2O3–(20−x)MnO2–80TeO2 (x=2, 5, 10, 15, and 20 mol%) composition were prepared by meltquenching technique to investigate the effects of mixed-transition metal ion Fe2 +/3 +//Mn3 +/4 + on AC conductivity and dielectric properties using impedance spectroscopy. Dielectric constant showed strong variation with Fe2O3 at a frequency ≥10 kHz, where έ decreased to a minimum value at x =10 mol% before increasing for x> 10%. The decrease in έ may be attributed to some form of hindrance effect on heavy dipoles caused by the mixed transition-ion effect (MTE). Meanwhile, variation of AC conductivity with Fe2O3 showed non-linear increase for x ≤ 10 mol% before dropping to a minimum at 15 mol% Fe2O3. This result was attributed to Anderson localization because of the disorder in the glass system. Conductivity analysis showed that the conduction mechanism at the dispersion region for x = 2 mol% followed the correlated barrier hopping (CBH) model, while the mechanism transformed to the overlapping large polaron tunnelling (OLPT) model at higher Fe2O3, content (x > 2 mol%). The electric modulus of the investigated samples showed asymmetric peak of the imaginary part of electric modulus (M¢¢), which reflected a non-Debye type relaxation. American Scientific Publishers 2016-04 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/55068/1/Anomalous%20dielectric%20constant%20and%20AC%20conductivity%20in%20mixed%20transition-metal-ion.pdf Hisam, Rosdiyana and Yahya, Ahmad Kamal and Mohamed Kamari, Halimah and Talib, Zainal Abidin and Yahaya Subban, Ri Hanum (2016) Anomalous dielectric constant and AC conductivity in mixed transition-metal-ion xFe2O3-(20 - x)MnO2-80TeO2 glass system. Materials Express, 6 (2). pp. 149-160. ISSN 2158-5849; ESSN: 2158-5857 10.1166/mex.2016.1286 |
| spellingShingle | Hisam, Rosdiyana Yahya, Ahmad Kamal Mohamed Kamari, Halimah Talib, Zainal Abidin Yahaya Subban, Ri Hanum Anomalous dielectric constant and AC conductivity in mixed transition-metal-ion xFe2O3-(20 - x)MnO2-80TeO2 glass system |
| title | Anomalous dielectric constant and AC conductivity in mixed transition-metal-ion xFe2O3-(20 - x)MnO2-80TeO2 glass system |
| title_full | Anomalous dielectric constant and AC conductivity in mixed transition-metal-ion xFe2O3-(20 - x)MnO2-80TeO2 glass system |
| title_fullStr | Anomalous dielectric constant and AC conductivity in mixed transition-metal-ion xFe2O3-(20 - x)MnO2-80TeO2 glass system |
| title_full_unstemmed | Anomalous dielectric constant and AC conductivity in mixed transition-metal-ion xFe2O3-(20 - x)MnO2-80TeO2 glass system |
| title_short | Anomalous dielectric constant and AC conductivity in mixed transition-metal-ion xFe2O3-(20 - x)MnO2-80TeO2 glass system |
| title_sort | anomalous dielectric constant and ac conductivity in mixed transition metal ion xfe2o3 20 x mno2 80teo2 glass system |
| url | http://psasir.upm.edu.my/id/eprint/55068/1/Anomalous%20dielectric%20constant%20and%20AC%20conductivity%20in%20mixed%20transition-metal-ion.pdf |
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