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
Mechanisms of the effect of dopants and P(O-2) on the improper ferroelastic phase transition in SrTiO3
Tkach, A; Vilarinho, PM; Kholkin, AL; Reaney, IM; Pokorny, J; Petzelt, J
2007, CHEMISTRY OF MATERIALS, 19, 26, 6471-6477.
CICECO Authorship
Dielectric permittivity and Cr3+ impurity ion probe luminescence in SrTiO3 sol-gel ceramics
Trepakov, VA; Savinov, ME; Okhay, O; Tkach, A; Vilarinho, PM; Kholkin, AL; Gregora, I; Jastrabik, L
2007, JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 27, 13-15, 3705-3707.
CICECO Authorship
The influence of dc bias on the dielectric response of Sr1-xCaxTiO3 ceramics
Tkach, A; Araujo, B; Vilarinho, PM
2006, ADVANCED MATERIALS FORUM III, PTS 1 AND 2, 514-516, 240-244.
CICECO Authorship
Dependence of dielectric properties of manganese-doped strontium titanate ceramics on sintering atmosphere
Tkach, A; Vilarinho, PM; Kholkin, AL
2006, ACTA MATERIALIA, 54, 20, 5385-5391.
CICECO Authorship
Broad-band dielectric spectroscopy analysis of relaxational dynamics in Mn-doped SrTiO3 ceramics
Tkach, A; Vilarinho, PM; Kholkin, AL; Pashkin, A; Veljko, S; Petzelt, J
2006, PHYSICAL REVIEW B, 73, 10,
CICECO Authorship
Polar behavior in Mn-doped SrTiO3 ceramics
Tkach, A; Vilarinho, PM; Kholkin, AL
2005, APPLIED PHYSICS LETTERS, 86, 17,
CICECO Authorship
Structure-microstructure-dielectric tunability relationship in Mn-doped strontium titanate ceramics
Tkach, A; Vilarinho, PM; Kholkin, AL
2005, ACTA MATERIALIA, 53, 19, 5061-5069.
CICECO Authorship
Lattice dynamics and dielectric response of Mg-doped SrTiO3 ceramics in a wide frequency range
Tkach, A; Vilarinho, PM; Kholkin, AL; Pashkin, A; Samoukhina, P; Pokorny, J; Veljko, S; Petzelt, J
2005, JOURNAL OF APPLIED PHYSICS, 97, 4,
CICECO Authorship
Effect of nonstoichiometry on the microstructure and dielectric properties of strontium titanate ceramics
Tkach, A; Vilarinho, PM; Senos, AMR; Kholkin, AL
2005, JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 25, 12, 2769-2772.
CICECO Authorship
Structural and dielectric properties of Mn-doped strontium titanate ceramics
Tkach, A; Vilarinho, PM; Kholkin, A
2004, FERROELECTRICS, 304, 87-90.
CICECO Authorship
Effect of Mg doping on the structural and dielectric properties of strontium titanate ceramics
Tkach, A; Vilarinho, PM; Kholkin, A
2004, APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 79, 8, 2013-2020.
CICECO Authorship
Structural and dielectric properties of Mg-doped strontium titanate ceramics: Dependence on the materials, processing
Tkach, A; Vilarinho, PM; Kholkin, A; Reaney, IM; Petzelt, J
2004, ADVANCED MATERIALS FORUM II, 455-456, 40-44.
CICECO Authorship
Dielectric permittivity and Cr3+ impurity luminescence of Sr0.99M0.01TiO3 and SrTi0.99Mg0.01O3
Trepakov, VA; Savinov, ME; Kudyk, IB; Pashkin, A; Kapphan, SE; Vilarinho, PM; Tkach, A; Kholkin, AL; Jastrabik, L
2003, FERROELECTRICS, 294, 229-238.
CICECO Authorship
Critical phonons and R- zero-phonon emission line of Cr3+ in Mg-doped SrTiO3
Trepakov, VA; Kudyk, IB; Kapphan, SE; Savinov, ME; Pashkin, A; Jastrabik, L; Tkach, A; Vilarinho, PM; Kholkin, AL
2003, JOURNAL OF LUMINESCENCE, 102, 536-542.
CICECO Authorship
Synthesis by sol-gel and characterization of strontium titanate powder
Tkach, A; Vilarinho, PM; Avdeev, M; Kholkin, AL; Baptista, JL
2002, ADVANCED MATERIALS FORUM I, 230-2, 40-43.
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

 
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