Yadav, Harish Kumar and Sreenivas, K. and Gupta, Vinay and Scott, J. F. and Katiyar, R. S. (2008) Raman spectroscopy and dielectric Studies of multiple phase transitions in ZnO:Ni. Applied Physics Letters, 92 (12). pp. 122908-3. DOI https://doi.org/10.1063/1.2902172
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Abstract
We present Raman and dielectric data on Ni-doped ZnO (Zn1−xNixO) ceramics as a function of Ni concentration (x=0.03, 0.06, and 0.10) and temperature. A mode (around 130 cm−1) is identified as TA(M) [J. M. Calleja and M. Cardona, Phys. Rev. B 16, 3753 (1977)] and appears due to an antiferromagnetic phase transition at low temperatures (100 K) via the spin-orbit mechanism [P. Moch and C. Dugautier, Phys. Lett. A 43, 169 (1973)]. A strong dielectric anomaly occurs at around 430–460 K, depending on Ni concentration, and is due to extrinsic electret effects (Ni ionic conduction) and not to a ferroelectric phase transition
Item Type: | Article |
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Uncontrolled Keywords: | 08AREP; IA57; |
Subjects: | 03 - Mineral Sciences |
Divisions: | 03 - Mineral Sciences |
Journal or Publication Title: | Applied Physics Letters |
Volume: | 92 |
Page Range: | pp. 122908-3 |
Identification Number: | https://doi.org/10.1063/1.2902172 |
Depositing User: | Sarah Humbert |
Date Deposited: | 01 Jun 2009 13:14 |
Last Modified: | 23 Jul 2013 09:55 |
URI: | http://eprints.esc.cam.ac.uk/id/eprint/1053 |
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