Oleksandr Tkach

Additive Manufacturing for Smart Plastics (AM4SP)

ParticipanteIndustry National

BioMEMs Avançados para Engenharia de Tecidos: Aplicações em Tecidos Duros (BioMEMs)

ParticipanteFundação para a Ciência e a Tecnologia

Materiais flexíveis piezoelétricos de alto desempenho preparados utilizando grafite porosa organizada para sensores e geração de energia (PIEZOFLEX)

ParticipanteFundação para a Ciência e a Tecnologia

Multiferroicos e magnetoeléctricos para spintrónica: barreiras e interfaces (PTDC/CTM/099415/2008)

ParticipanteFundação para a Ciência e a Tecnologia

Multifunctional all-oxide heterostructures for electronic applications (IF/00602/2013/CP1162/CT0015)

CoordenadorFundação para a Ciência e a Tecnologia

Enhancement of tetragonality and role of strontium vacancies in heterovalent doped SrTiO3

Tkach, A; Almeida, A; Moreira, JA; Correia, TM; Chaves, MR; Okhay, O; Vilarinho, PM; Gregora, I; Petzelt, J
2011, APPLIED PHYSICS LETTERS, 98, 5.

Lithium-induced dielectric relaxations in potassium tantalate ceramics

Tkach, A; Almeida, A; Moreira, JA; Espinha, A; Chaves, MR; de la Cruz, JP; Vilarinho, PM
2011, JOURNAL OF PHYSICS D-APPLIED PHYSICS, 44, 31.

Role of trivalent Sr substituents and Sr vacancies in tetragonal and polar states of SrTiO3

Tkach, A; Correia, TM; Almeida, A; Moreira, JA; Chaves, MR; Okhay, O; Vilarinho, PM; Gregora, I; Petzelt, J
2011, ACTA MATERIALIA, 59, 14, 5388-5397.

Role of initial potassium excess on the properties of potassium tantalate ceramics

Tkach, A; Vilarinho, PM; Almeida, A
2011, JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 31, 13, 2303-2308.

Mechanisms of magnetoelectricity in manganese-doped incipient ferroelectrics

Kuzian, RO; Laguta, VV; Dare, AM; Kondakova, IV; Marysko, M; Raymond, L; Garmash, EP; Pavlikov, VN; Tkach, A; Vilarinho, PM; Hayn, R
2010, EPL, 92, 1.

X-ray absorption fine structure studies of Mn coordination in doped perovskite SrTiO3

Levin, I; Krayzman, V; Woicik, JC; Tkach, A; Vilarinho, PM
2010, APPLIED PHYSICS LETTERS, 96, 5.

Low temperature dielectric characterization of Mg-doped SrTiO3 thin films prepared by sol-gel

Okhay, O; Wu, AY; Vilarinho, PM; Tkach, A
2010, APPLIED PHYSICS LETTERS, 96, 15.

Dielectric response of polycrystalline Sr1-1.5xBixTiO3 thin films under direct current bias

Okhay, O; Wu, AY; Vilarinho, PM; Tkach, A
2010, APPLIED PHYSICS LETTERS, 97, 6.

Lattice dynamics in Ba0.7Sr0.3TiO3: study by THz and IR spectroscopy and ab initio simulations

Ostapchuk, T; Petzelt, J; Kuzel, P; Savinov, M; Hlinka, J; Tkach, A; Vilarinho, PM; Lisenkov, S; Ponomareva, I; Bellaiche, L
2010, PHASE TRANSITIONS, 83, 10-11, 955-965.

Spin cluster glass and magnetoelectricity in Mn-doped KTaO3.

Shvartsman, VV; Bedanta, S; Borisov, P; Kleemann, W; Tkach, A; Vilarinho, PM
2010, JOURNAL OF APPLIED PHYSICS, 107, 10.

Strontium Titanate: Synthesis, Properties and Uses

Tkach, A; Vilarinho, PM
2019, New York, Nova Science Publishers, Inc.
ISBN: 978-1-53615-437-5

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

Metal Oxide Based Thermoelectric Materials

In Kumar, V., Ayoub, I., Sharma, V., Swart, H.C. (Eds.), Optical Properties of Metal Oxide Nanostructures
Okhay O.; Tkach A.
2023, Progress in Optical Science and Photonics, 26, 399-430, Springer.
ISBN: 978-981-99-5640-1

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

Strontium Titanate: Synthesis, Properties and Uses

Tkach, A; Vilarinho, PM
2019, New York, Nova Science Publishers, Inc.
ISBN: 978-1-53615-437-5

Hydrothermal Synthesis of Barium Titanate Nanoparticles: The Effect of the Heating System

F. Sá, M. Silva, M. Ivanov, A. Tkach, P.M. Vilarinho, P. Ferreira
2022, Materials Proceedings, 14, 1-4.
ISBN: 978-1-6654-6831-2