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Impedance spectroscopy study of lanthanum-gallium tantalate single crystals grown under different conditions

Ilya M. Anfimov 1
Ilya M. Anfimov
,  ,  ,  , 
1 National University of Science and Technology MISiS, 4 Leninsky Prospekt, Moscow 119049, Russia
2 SC Fomos-Materials, 16 Buzheninova Str., Moscow 107023, Russia
10.3897/j.moem.5.2.47082
Published 1 June 2019
Communication , Volume 5, Issue 2, 41-49
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Anfimov I. M. et al. Impedance spectroscopy study of lanthanum-gallium tantalate single crystals grown under different conditions // Modern Electronic Materials. 2019. Vol. 5. No. 2. pp. 41-49.
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Anfimov I. M., Buzanov O. A., Kozlova A. P., Kozlova N. S., Zabelina E. V. Impedance spectroscopy study of lanthanum-gallium tantalate single crystals grown under different conditions // Modern Electronic Materials. 2019. Vol. 5. No. 2. pp. 41-49.
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TY - JOUR
DO - 10.3897/j.moem.5.2.47082
UR - https://moem.colab.ws/publications/10.3897/j.moem.5.2.47082
TI - Impedance spectroscopy study of lanthanum-gallium tantalate single crystals grown under different conditions
T2 - Modern Electronic Materials
AU - Anfimov, Ilya M.
AU - Buzanov, Oleg A.
AU - Kozlova, Anna P.
AU - Kozlova, Nina S.
AU - Zabelina, Evgeniya V.
PY - 2019
DA - 2019/06/01
PB - НИТУ МИСИС
SP - 41-49
IS - 2
VL - 5
ER -
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@article{2019_Anfimov,
author = {Ilya M. Anfimov and Oleg A. Buzanov and Anna P. Kozlova and Nina S. Kozlova and Evgeniya V. Zabelina},
title = {Impedance spectroscopy study of lanthanum-gallium tantalate single crystals grown under different conditions},
journal = {Modern Electronic Materials},
year = {2019},
volume = {5},
publisher = {НИТУ МИСИС},
month = {Jun},
url = {https://moem.colab.ws/publications/10.3897/j.moem.5.2.47082},
number = {2},
pages = {41--49},
doi = {10.3897/j.moem.5.2.47082}
}
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Anfimov, Ilya M., et al. “Impedance spectroscopy study of lanthanum-gallium tantalate single crystals grown under different conditions.” Modern Electronic Materials, vol. 5, no. 2, Jun. 2019, pp. 41-49. https://moem.colab.ws/publications/10.3897/j.moem.5.2.47082.
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Keywords

admittance
dielectric permeability
growth atmosphere
impedance spectroscopy
langatate

Abstract

The effect of the growth atmosphere and the type of deposited current conductive coatings on the impedance/admittance of La3Ta0.5Ga5.5O14 lanthanum-gallium tantalate has been revealed. The lanthanum-gallium tantalate single crystals have been grown in argon and argon with admixture of oxygen gas atmospheres. Current conductive coatings of iridium, gold with a titanium sublayer, and silver with a chromium sublayer have been deposited onto the single crystals. The tests have been carried out taking into account the polarity of the specimens. The temperature and frequency dependences of the admittance of lanthanum-gallium tantalate have been measured in an alternating electric field at frequencies in the 5 Hz to 500 kHz range and temperatures from 20 to 450 °C. The specimens with gold current conductive coating have the lowest admittance. Analysis of the temperature and frequency functions of the dielectric permeability has shown the absence of any frequency dependence in the entire test range.

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