Oleksandr Tkach
  Investigador Auxiliar  
   
  telefone: 234370235  
  extensão: 22911  
  e-mail: atkach@ua.pt  
  departamento: Engenharia de Materiais e Cerâmica  
  gabinete: 9.2.18  
   
  grupo: 2 - nanoestruturas e cerâmicos ferróicos multifuncionais
 
  linha: 1 - tecnologias da informação e comunicação
 		 
  url directo: https://www.ciceco.ua.pt/oleksandrtkach  
   
Últimas Notícias


orientações científicas em curso


Projectos
Group2 Icon Additive Manufacturing for Smart Plastics (AM4SP)
Group5 Icon Group2 Icon Group0 Icon BioMEMs Avançados para Engenharia de Tecidos: Aplicações em Tecidos Duros (BioMEMs)
Group2 Icon Materiais flexíveis piezoelétricos de alto desempenho preparados utilizando grafite porosa organizada para sensores e geração de energia (PIEZOFLEX)
Group3 Icon Group2 Icon Multiferroicos e magnetoeléctricos para spintrónica: barreiras e interfaces (PTDC/CTM/099415/2008)
Group2 Icon Multifunctional all-oxide heterostructures for electronic applications (IF/00602/2013/CP1162/CT0015)


publicações
Effect of Solution Conditions on the Properties of Sol-Gel Derived Potassium Sodium Niobate Thin Films on Platinized Sapphire Substrates
Tkach, A; Santos, A; Zlotnik, S; Serrazina, R; Okhay, O; Bdikin, I; Costa, ME; Vilarinho, PM
2019, NANOMATERIALS, 9, 11,
CICECO Authorship
Thermoelectric performance of Nb-doped SrTiO3 enhanced by reduced graphene oxide and Sr deficiency cooperation
Okhay, O; Zlotnik, S; Xie, WJ; Orlinski, K; Gallo, MJH; Otero-Irurueta, G; Fernandes, AJS; Pawlak, DA; Weidenkaff, A; Tkach, A
2019, CARBON, 143, 215-222.
CICECO Authorship
Tuning electrical and thermoelectric properties of freestanding graphene oxide papers by carbon nanotubes and heat treatment
Okhay, O; Goncalves, G; Dias, C; Ventura, J; Vieira, EMF; Goncalves, LMV; Tkach, A
2019, JOURNAL OF ALLOYS AND COMPOUNDS, 781, 196-200.
CICECO Authorship
Enhancement of the dielectric permittivity and magnetic properties of Dy substituted strontium titanate ceramics
Tkach, A; Amaral, JS; Zlotnik, S; Amaral, VS; Vilarinho, PM
2018, JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 38, 2, 605-611.
CICECO Authorship
Mechanical strain engineering of dielectric tunability in polycrystalline SrTiO3 thin films
Tkach, A; Okhay, O; Reaney, IM; Vilarinho, PM
2018, JOURNAL OF MATERIALS CHEMISTRY C, 6, 10, 2467-2475.
CICECO Authorship
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.
CICECO Authorship
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.
CICECO Authorship
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.
CICECO Authorship
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.
CICECO Authorship
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,
CICECO Authorship
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.
CICECO Authorship
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.
CICECO Authorship
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.
CICECO Authorship
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.
CICECO Authorship
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,
CICECO Authorship
Antiferrodistortive phase transition in doped strontium titanate ceramics: the role of the perovskite lattice vacancies
Alexander Tkach
In J. Clabel and V. Rivera (Eds.), Perovskite Ceramics
2022, 77-98. Elsevier.
CICECO Authorship
Nonstoichiometry Role on the Properties of Quantum-Paraelectric Ceramics
Tkach, A; Vilarinho, PM
In Tanasescu, S. (Eds.), Structure Processing Properties Relationships in Stoichiometric and Nonstoichiometric Oxides
2020, London: IntechOpen.
CICECO Authorship
Strain effect on the properties of polar dielectric thin films
Tkach, A; Okhay, O; Santos, A; Zlotnik, S; Serrazina, R; Vilarinho, PM; Costa, ME
In Alexander Pogrebnjak and Valentin Novosad (Eds.), Advances in Thin Films, Nanostructured Materials, and Coatings
2019, 331-342. Springer Nature Singapore Pte Ltd.
CICECO Authorship
Sr/Ti ratio in strontium titanate ceramics: designing the microstructure, envisaging the properties
Amaral, L; Tkach, A; Vilarinho, PM; Senos, AMR
In Alexander Tkach and Paula Vilarinho (Eds.), Strontium Titanate: Synthesis, Properties and Uses
2019, 71-100. New York: Nova Science Publishers, Inc.
CICECO Authorship
Effect of bismuth doping on the properties of strontium titanate thin films
Okhay, O; Tkach, A; Vilarinho, PM
In Alexander Tkach and Paula Vilarinho (Eds.), Strontium Titanate: Synthesis, Properties and Uses
2019, 209-258. New York: Nova Science Publishers, Inc.
CICECO Authorship
Enhancement of thermoelectric performance in SrTiO3-based ceramics by processing conditions
Tkach, A; Resende, J; Diaz-Chao, P; Guilmeau, E; Costa, ME; Vilarinho, PM
In Alexander Tkach and Paula Vilarinho (Eds.), Strontium Titanate: Synthesis, Properties and Uses
2019, 297-322. New York: Nova Science Publishers, Inc.
CICECO Authorship
Functional Tantalum-based Oxides: From the Structure to the Applications
S. Zlotnik, A. Tkach, P. M. Vilarinho
In Ashutosh Tiwari, Rosario A. Gerhardt andMagdalena Szutkowska (Eds.), Advanced Ceramic Materials
2016, 337-283. John Wiley & Sons, Inc.
CICECO Authorship

 
Apoio

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