Oleksandr Tkach

Investigador Auxiliar

Projectos

Publicações

Oxygen vacancies as a link between the grain growth and grain boundary conductivity anomalies in titanium-rich strontium titanate

Tkach, A; Amaral, L; Vilarinho, PM; Senos, AMR
2018, JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 38, 6, 2547-2552.

Low loss tunable dielectric BaNd2Ti5O14- (Ba0.5Sr0.5)TiO3 composite thick films

Vilarinho, PM; Fu, Z; Kingon, AI; Tkach, A
2018, SCRIPTA MATERIALIA, 155, 160-163.

Abnormal Grain Growth as a Method To Enhance the Thermoelectric Performance of Nb-Doped Strontium Titanate Ceramics

Tkach, A; Resende, J; Saravanan, KV; Costa, ME; Diaz-Chao, P; Guilmeau, E; Okhay, O; Vilarinho, PM
2018, ACS SUSTAINABLE CHEMISTRY & ENGINEERING, 6, 12, 15988-15994.

Interface-based reduced coercivity and leakage currents of BiFeO3 thin films: A comparative study

Tomczyk, M; Mahajan, A; Tkach, A; Vilarinho, PM
2018, MATERIALS & DESIGN, 160, 1322-1334.

Strain-Mediated Substrate Effect on the Dielectric and Ferroelectric Response of Potassium Sodium Niobate Thin Films

Tkach, A; Santos, A; Zlotnik, S; Serrazina, R; Okhay, O; Bdikin, I; Costa, ME; Vilarinho, PM
2018, COATINGS, 8, 12.

Polar phonons in polycrystalline SrTiO3 thin films: The role of the substrate

Okhay, O; Tkach, A; Nuzhnyy, D; Petzelt, J; Vilarinho, PM
2018, FERROELECTRICS, 532, 1, 89-99.

Dielectric spectroscopy and magnetometry investigation of Gd-doped strontium titanate ceramics

Tkach, A; Amaral, JS; Vitor, SAB; Vilarinho, PM
2017, JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 37, 6, 2391-2397.
ISBN: 1873-619X

Giant dielectric permittivity and high tunability in Y-doped SrTiO3 ceramics tailored by sintering atmosphere

Tkach, A; Okhay, O; Almeida, A; Vilarinho, PM
2017, ACTA MATERIALIA, 130, 249-260.
ISBN: 1873-2453

Modification of magnetic anisotropy in Ni thin films by poling of (011) PMN-PT piezosubstrates

Tkach, A; Kehlberger, A; Buttner, F; Jakob, G; Eisebitt, S; Klaui, M
2016, FERROELECTRICS, 499, 1, 135-142.

Thin film versus paper-like reduced graphene oxide: Comparative study of structural, electrical, and thermoelectrical properties

Okhay, O; Goncalves, G; Tkach, A; Dias, C; Ventura, J; da Silva, MFR; Goncalves, LMV; Titus, E
2016, JOURNAL OF APPLIED PHYSICS, 120, 5.

Metal Oxide Based Thermoelectric Materials

In Vijay Kumar, Irfan Ayoub, Vishal Sharma, Hendrik C. Swart (Eds.), Optical Properties of Metal Oxide Nanostructures
Olena Okhay and Alexander Tkach
2023, 399-430, Singapore , Springer Nature Singapore Pte Ltd..
ISBN: 978-981-99-5639-5

Antiferrodistortive phase transition in doped strontium titanate ceramics: the role of the perovskite lattice vacancies

In J. Clabel and V. Rivera (Eds.), Perovskite Ceramics
Alexander Tkach
2022, 77-98, Elsevier.
ISBN: 978-0-323-90586-2

Nonstoichiometry Role on the Properties of Quantum-Paraelectric Ceramics

In Tanasescu, S. (Eds.), Structure Processing Properties Relationships in Stoichiometric and Nonstoichiometric Oxides
Tkach, A; Vilarinho, PM
2020, London, IntechOpen.
ISBN: 978-1-78985-452-7

Strain effect on the properties of polar dielectric thin films

In Alexander Pogrebnjak and Valentin Novosad (Eds.), Advances in Thin Films, Nanostructured Materials, and Coatings
Tkach, A; Okhay, O; Santos, A; Zlotnik, S; Serrazina, R; Vilarinho, PM; Costa, ME
2019, 331-342, Springer Nature Singapore Pte Ltd.
ISBN: 978-981-13-6132-6

Sr/Ti ratio in strontium titanate ceramics: designing the microstructure, envisaging the properties

In Alexander Tkach and Paula Vilarinho (Eds.), Strontium Titanate: Synthesis, Properties and Uses
Amaral, L; Tkach, A; Vilarinho, PM; Senos, AMR
2019, 71-100, New York, Nova Science Publishers, Inc.
ISBN: 978-1-53615-437-5

Effect of bismuth doping on the properties of strontium titanate thin films

In Alexander Tkach and Paula Vilarinho (Eds.), Strontium Titanate: Synthesis, Properties and Uses
Okhay, O; Tkach, A; Vilarinho, PM
2019, 209-258, New York, Nova Science Publishers, Inc.
ISBN: 978-1-53615-437-5

Enhancement of thermoelectric performance in SrTiO3-based ceramics by processing conditions

In Alexander Tkach and Paula Vilarinho (Eds.), Strontium Titanate: Synthesis, Properties and Uses
Tkach, A; Resende, J; Diaz-Chao, P; Guilmeau, E; Costa, ME; Vilarinho, PM
2019, 297-322, New York, Nova Science Publishers, Inc.
ISBN: 978-1-53615-437-5

Functional Tantalum-based Oxides: From the Structure to the Applications

In Ashutosh Tiwari, Rosario A. Gerhardt andMagdalena Szutkowska (Eds.), Advanced Ceramic Materials
S. Zlotnik, A. Tkach, P. M. Vilarinho
2016, 337-283, John Wiley & Sons, Inc.
ISBN: 978-1-119-24244-4

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