A broadband dielectric investigation and Mossbauer studies were performed on 0.7BaTiO(3)-0.3NiFe(2)O(4) composite ceramics prepared from chemically obtained barium titanate and nickel ferrite powders. Dielectric spectroscopy revealed a Debye-type relaxation at frequencies between 10 GHz and 1 THz. The relaxation time slows down on cooling according to the Arrhenius law which can be attributed to the transformation of the system from the paraelectric to the ferroelectric phase through an intermediate relaxor state. The temperature dependence of the center shift of the Mossbauer spectrum was analyzed by applying Debye and Einstein models. Its deviation from these models can be attributed to the anharmonicity. It is also possible that the center shift is affected by the Fe atoms incorporated in BaTiO3 lattice or at the interfaces between BaTiO3 and NiFe2O4.
Keywords:
ceramics composite / multiferroics / dielectric analysis / Mossbauer study
Source:
Journal of Materials Science-Materials in Electronics, 2015, 26, 12, 9727-9734
Publisher:
Springer, Dordrecht
Funding / projects:
European Social Fund under the Global Grant measure [VP1-3.1-SMM-07-K-03-011]
TY - JOUR
AU - Grigalaitis, R.
AU - Vijatović-Petrović, Mirjana
AU - Baltrunas, D.
AU - Mazeika, K.
AU - Stojanović, Biljana D
AU - Banys, J.
PY - 2015
UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/843
AB - A broadband dielectric investigation and Mossbauer studies were performed on 0.7BaTiO(3)-0.3NiFe(2)O(4) composite ceramics prepared from chemically obtained barium titanate and nickel ferrite powders. Dielectric spectroscopy revealed a Debye-type relaxation at frequencies between 10 GHz and 1 THz. The relaxation time slows down on cooling according to the Arrhenius law which can be attributed to the transformation of the system from the paraelectric to the ferroelectric phase through an intermediate relaxor state. The temperature dependence of the center shift of the Mossbauer spectrum was analyzed by applying Debye and Einstein models. Its deviation from these models can be attributed to the anharmonicity. It is also possible that the center shift is affected by the Fe atoms incorporated in BaTiO3 lattice or at the interfaces between BaTiO3 and NiFe2O4.
PB - Springer, Dordrecht
T2 - Journal of Materials Science-Materials in Electronics
T1 - Broadband dielectric and Mossbauer studies of BaTiO3-NiFe2O4 composite multiferroics
EP - 9734
IS - 12
SP - 9727
VL - 26
DO - 10.1007/s10854-015-3641-8
ER -
@article{
author = "Grigalaitis, R. and Vijatović-Petrović, Mirjana and Baltrunas, D. and Mazeika, K. and Stojanović, Biljana D and Banys, J.",
year = "2015",
abstract = "A broadband dielectric investigation and Mossbauer studies were performed on 0.7BaTiO(3)-0.3NiFe(2)O(4) composite ceramics prepared from chemically obtained barium titanate and nickel ferrite powders. Dielectric spectroscopy revealed a Debye-type relaxation at frequencies between 10 GHz and 1 THz. The relaxation time slows down on cooling according to the Arrhenius law which can be attributed to the transformation of the system from the paraelectric to the ferroelectric phase through an intermediate relaxor state. The temperature dependence of the center shift of the Mossbauer spectrum was analyzed by applying Debye and Einstein models. Its deviation from these models can be attributed to the anharmonicity. It is also possible that the center shift is affected by the Fe atoms incorporated in BaTiO3 lattice or at the interfaces between BaTiO3 and NiFe2O4.",
publisher = "Springer, Dordrecht",
journal = "Journal of Materials Science-Materials in Electronics",
title = "Broadband dielectric and Mossbauer studies of BaTiO3-NiFe2O4 composite multiferroics",
pages = "9734-9727",
number = "12",
volume = "26",
doi = "10.1007/s10854-015-3641-8"
}
Grigalaitis, R., Vijatović-Petrović, M., Baltrunas, D., Mazeika, K., Stojanović, B. D.,& Banys, J.. (2015). Broadband dielectric and Mossbauer studies of BaTiO3-NiFe2O4 composite multiferroics. in Journal of Materials Science-Materials in Electronics
Springer, Dordrecht., 26(12), 9727-9734.
https://doi.org/10.1007/s10854-015-3641-8
Grigalaitis R, Vijatović-Petrović M, Baltrunas D, Mazeika K, Stojanović BD, Banys J. Broadband dielectric and Mossbauer studies of BaTiO3-NiFe2O4 composite multiferroics. in Journal of Materials Science-Materials in Electronics. 2015;26(12):9727-9734.
doi:10.1007/s10854-015-3641-8 .
Grigalaitis, R., Vijatović-Petrović, Mirjana, Baltrunas, D., Mazeika, K., Stojanović, Biljana D, Banys, J., "Broadband dielectric and Mossbauer studies of BaTiO3-NiFe2O4 composite multiferroics" in Journal of Materials Science-Materials in Electronics, 26, no. 12 (2015):9727-9734,
https://doi.org/10.1007/s10854-015-3641-8 . .
