Optical damage limits the application range of congruent LiNbO3. This problem is commonly overcome by adding optical-damage-resistant cations. Here, the influence of doping with optical-damage-resistant Mg and Zn on the ionic and piezoelectric contributions to the dielectric permittivity is investigated in a broad frequency range (1 mHz–2 THz). It is shown that the two dopants have radically different influences on the variation of ionic permittivity with doping, in spite of their similarities with respect to the crystallographic structure. Raman spectroscopy reveals that the difference in permittivity can be traced to the effect of Mg and Zn doping on the susceptibility of the phonon modes. Both observations point to differences in the defect incorporation mechanisms.
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21 April 2018
Research Article|
April 17 2018
Effect of optical damage resistant dopants on the dielectric properties of LiNbO3: Insight from broadband impedance spectroscopy and Raman scattering
Charlotte Cochard;
Charlotte Cochard
1
MRT Department, Luxembourg Institute of Science and Technology (LIST)
, 4362 Esch-sur-Alzette, Luxembourg
2
Centre for Nanostructured Media, School of Mathematics and Physics, Queen's University Belfast
, Belfast BT7 1NN, United Kingdom
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Mael Guennou;
Mael Guennou
1
MRT Department, Luxembourg Institute of Science and Technology (LIST)
, 4362 Esch-sur-Alzette, Luxembourg
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Thiemo Spielmann;
Thiemo Spielmann
3
IEE S.A., ZAE Weiergewan
, 11 Rue Edmond Reuter, L-5326 Contern, Luxembourg
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Niels van Hoof;
Niels van Hoof
4
Dutch Institute for Fundamental Energy Research (DIFFER)
, De Zaale 20, 5612 AJ Eindhoven, The Netherlands
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Alexei Halpin
;
Alexei Halpin
4
Dutch Institute for Fundamental Energy Research (DIFFER)
, De Zaale 20, 5612 AJ Eindhoven, The Netherlands
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Torsten Granzow
Torsten Granzow
1
MRT Department, Luxembourg Institute of Science and Technology (LIST)
, 4362 Esch-sur-Alzette, Luxembourg
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J. Appl. Phys. 123, 154105 (2018)
Article history
Received:
January 08 2018
Accepted:
March 31 2018
Citation
Charlotte Cochard, Mael Guennou, Thiemo Spielmann, Niels van Hoof, Alexei Halpin, Torsten Granzow; Effect of optical damage resistant dopants on the dielectric properties of LiNbO3: Insight from broadband impedance spectroscopy and Raman scattering. J. Appl. Phys. 21 April 2018; 123 (15): 154105. https://doi.org/10.1063/1.5021758
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