International Conference of Students and Young Researchers in Theoretical and Experimental Physics “HEUREKA-2023”
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The Department of General Physics was created on the base of the Department of Experimental Physics in 1945. In different years the Department was headed by docents S. P. Lytvynenko (1945–1959), V. N. Vyshnevskyy (1959–1962), B. M. Palyukh (1962–1974) and professors O. B. Lyskovych (1974–1996), Z. B. Stasyuk (1996–2003).
In 2003 after the division of the Faculty of Physics into the Faculty of Electronics and the Faculty of Physics, the Department was headed by docent Yu. V. Karavan (2003), professor V. D. Bondar (2003–2004), docent N. V. Pasternak (2004–2005), professor Ya. I. Shopa (2005–2015), docent T. M. Demkiv (October 2015–April 2016). Since May 2016 professor V. Yo. Stadnyk has headed the Department of General Physics; he was awarded the Honorary Title “Honored Professor of Ivan Franko National University of Lviv” on September 29, 2021.
While the Department of General Physics was created natural sciences students of the University were being taught Physics and the training to physics students for teaching work was being provided. Within the 70–80ss years the Department of General Physics was the key one for Higher Educational Institutions of Western Ukraine. Teachers of the Department prepared specialists for such specialties as “Physics” (specializations: “Physical Electronics” (1963–2003), “Physics of Medical-Biological Systems”, “Physical and Biomedical Electronics” (1992–2003), “Scientific and Technical Examination” (2005–2010)). Since 2010 specialists in the area of “Applied Physics” has been prepared by teachers of the Department of General Physics.
At the Department bachelors in specialties of 105 “Applied Physics and Nanomaterials”, 014 “Secondary Education (Physics)” of specialization “Physics and Astronomy” and 105 “Applied Physics and Nanomaterials” of specialization “Computer Technologies in Applied Physics” (2018 year of enrollment) and masters in specialty of “Applied Physics and Nanomaterials” (1 y. 4 m.) are studying.
The training of bachelors and masters is provided by 7 teachers: Professors, Doctors of Physical and Mathematical Sciences V. Yo. Stadnyk (Chairperson, Department of General Physics) and T. M. Demkiv, Docents, Candidates of Physical and Mathematical Sciences O. I. Konopelnyk, N. Ye. Ftomyn, Ya. M. Chornodolskyy and P. A. Shchepanskyi, and Lecturer I. A. Pryshko. At the Department there are General Physics Practical Work Laboratory (Mechanics, Molecular Physics, Electricity, Optics) and Computer Equipment Laboratory.
From the moment of the Department creation scientific researches widely known over Ukraine and nowadays also in the European Union have been conducted. The staff of the Department takes an active part in international scientific conferences, publishes articles in foreign and Ukrainian professional issues. The teachers of the Department are the authors of 29 patents of Ukraine for inventions and useful models. In 2010 Docent O. I. Konopelnyk got a President grant for supporting of scientific researches of young scientists. In 2011–2013 years Laboratory Chief Manager, Candidate of Physical and Mathematical Sciences I. S. Novosad was a scholar of the Cabinet of Ministers of Ukraine for Young Scientists. Docent N. Ye. Ftomyn headed the theme named “Parametric crystal optics, optical properties and structure of complex oxides of the langasite family” carried out within the working time of a teacher. The employees of the Department continue to work scientifically on various state budget themes. Research Fellow, Candidate of Physical and Mathematical Sciences M. Ya. Rudysh had received the academic scholarship of the President of Ukraine for university students and postgraduate students (2017–2018). In November 2019 he received the Award of the Regional State Administration and the Regional Council for Employees of Scientific Institutions and Higher Educational Institutions (Universities, Academies, Institutes) of the Lviv Region. He is a scholar of the Cabinet of Ministers of Ukraine for Young Scientists (2020–2022). Research Fellow, Scholar of the Cabinet of Ministers of Ukraine for Young Scientists (2020–2022), Candidate of Physical and Mathematical Sciences P.A. Shchepanskyi obtained an award for Employees of Scientific Institutions and Institutions of Higher Education from the Lviv Regional State Administration and the Lviv Regional Council on November 16, 2020.
Professor V. Yo. Stadnyk was a scientific supervisor of the State budget theme Fz-53F named “New materials for functional electronics on the basis of semiconductor and dielectric crystals of А4ВХ6 and А2ВХ4 groups” and the Economic contractual theme F76/77-2018 named “Synthesis of a new class of crystalline materials of А2ВХ4 group and study of the prospects of their effective application in electromagnetic radiation controlling devices”. Currently professor V. Yo. Stadnyk is a scientific supervisor of the State budget theme Fz-08F named “Transformation of the optic-electronic parameters and structure of new crystalline materials for sensor devices and optoelectronics” (2020–2022 years).
Achievements of young scientists include above 200 scientific works and 3 utility models of Ukraine. Postgraduate students are actively involved in scientific work under the supervision of Professor V. Yo. Stadnyk and Docent Ya. M. C hornodolskyy, participate in international conferences and publish scientific results in leading foreign and Ukrainian issues.
The staff of the Department maintains close scientific contacts with the Institute for Scintillation Materials NAS of Ukraine (Kharkiv, Ukraine), SRC “Carat” (Lviv, Ukraine) and with a number of foreign institutions such as Institute of Physics Jan Dlugosz University in Czestochowa (Czestochowa, Poland), Depatment of Electronics and Computer Science, Koszalin University of Technology (Koszalin, Poland), Cardinal Stefan Wyszynski University in Warsaw (Warsaw, Poland) and others.
The main areas of scientific activity of the Department are:
Employees of the General Physics Department also closely cooperate with the Lviv Regional Small Academy of Sciences and contribute to the education of the future generation of qualified physicists. Pupils actively participate in summer schools, in particular “Dive into the world of science: physics and chemistry” (June 6-10, 2022), and from September 2022 until now they are studying the course “Electricity and magnetism” in depth with great interest, passing laboratory work on General Physics Department, where theoretical material is readily explained to them, and they have assistance in conducting an experiment and calculating the relevant quantities based on the obtained results. In the process of learning, pupils performed 8 laboratory works under the guidance of assistant I. A. Pryshko. In addition, they had the opportunity to listen to the lectures on “Electric current in different environments” (read by assistant I. A. Pryshko) and about research conducted by scientists at various departments, get acquainted with some other educational laboratories and the faculty itself.
|Chairperson, Chief Researcher (by-worker)Vasyl Stadnyk||Chairperson, Chief Researcher (by-worker)|
|Associate Professor (by-worker)Yaroslav Chornodolskyy||Associate Professor (by-worker)|
|Associate Professor, Associate Professor (by-worker)Nazar Ftomyn||Associate Professor, Associate Professor (by-worker)|
|Associate ProfessorOksana Konopelnyk||Associate Professor|
|Associate ProfessorPavlo Shchepanskyi||Associate Professor|
|Laboratory Chief ManagerLesia Kukharska||Laboratory Chief Manager|
|Laboratory Chief ManagerIryna Novosad||Laboratory Chief Manager|
|Lead EngineerOksana Radkovska||Lead Engineer|
|Lead EngineerVitalii Shveidigula||Lead Engineer|
|1st Category EngineerRaisa Lekhiv||1st Category Engineer|
|Senior Department SecretaryMariia Kodreanu||Senior Department Secretary|
|Postgraduate StudentBohdan Horon||Postgraduate Student|
|Postgraduate StudentRoman Kildiyarov||Postgraduate Student|
|Postgraduate StudentTaras Muzyka||Postgraduate Student|
|Postgraduate StudentOleksandr Pidhornyi||Postgraduate Student|
|Postgraduate Student, Lecturer (by-worker)Ivan Pryshko||Postgraduate Student, Lecturer (by-worker)|
|Postgraduate StudentOrest Shtuka||Postgraduate Student|
Professor Vasyl Stadnyk is a scientific supervisor of the State budget theme Fz-08F named “Transformation of the optic-electronic parameters and structure of new crystalline materials for sensor devices and optoelectronics” (01.05.2020 – 31.12.2022).
Aim of the work: Elucidation of optic-electronic and band-energy parameters of ferroics of ABSO4 (including substitutional solid solutions and crystals incorporated by transition metal impurities) and A4BX6 structural types and the influence of external fields on them for possible use of the crystals as active elements of functional electronics devices.
The LiNH4SO4 dielectric single crystal of β-polymorphic modification was synthesized by the method of slow evaporation of the aqueous solution at constant temperature of 308 K. In order to identify the grown crystals the X-ray diraction studies were performed. The crystal was confirmed to belong to the β-modication with orthorhombic symmetry of Pna21 space group symmetry. At temperatures above 461 K the birefringence curves for all three directions slightly change the course. In order to confirm the presence of the phase transition in the β-LiNH4SO4 crystal during heating, we performed the differential thermal analysis.
5 articles (including 3 articles in Scopus) and 6 abstracts of reports were published, and the thesis for a Doctor degree and the thesis for a Candidate degree were defended.
The temperature, spectral and baric dependences of the birefringence Δni of potassium sulfate crystals doped with 1.7 % of copper are studied. The introducing of the impurity is established to change the absolute value of Δni and leads to an increase in the temperature dependence Δnі(Т). It was shown, that isotropic points (IP) appear in the impurity potassium sulfate crystal, and are shifted towards lower temperatures by 5 and 11 K, respectively, in comparison with the corresponding of pure crystal. It was established, that uniaxial stresses change the absolute values of Δni, as well as the region of existence of the isotropic state. The temperature-spectral-baric diagrams of the IP of crystal in the X and Y directions showed that when uniaxial pressure increases to 200 bar, IP is almost linearly shifted toward higher or lower temperatures. The most sensitive to the influence of uniaxial stresses is IP in the X-direction (IP shifts toward higher temperatures), while when crystal is compressed along the Y axis, the IP shifts toward lower temperatures. Uniaxial stress significantly expands the temperature range of existence of the isotropic state of this crystal.
The tutorial, 4 articles in international journals included in the scientometric databases Scopus and Web of Science, 2 conference articles and 5 abstracts of international conferences were published.
Grant of the National Research Fund of Ukraine 2020.02/0211 “Experimental and theoretical study and prediction of the photoelastic properties of crystalline materials for devices of electromagnetic radiation control”.
Aim of the work: Development of a methodology for accurate study and prediction of refractive characteristics and creation of a database of the firstly synthesized crystalline materials of the A2BX4 group for their effective use in optoelectronic devices, including acoustic-optical cells.
Résumé of the 1st stage:
A literature review of the physical properties of the impurity K2SO4 crystals was performed. It was found that the impurity significantly change the behavior of the dielectric constant and the dielectric loss coefficient. Potassium sulphate crystal with 3 % copper content was synthesized and its dispersion dependences of refractive indices ni(λ) and birefringence Δni(λ) at room temperature were investigated. It was found that the introduction of the impurity leads to a decrease in ni by approximately 0.001… 0.002. Crystal-optical parameters were calculated and it was found that the introducing of the impurity shifts the position of the centers of UV oscillators l01 in the long-wavelength part of the spectrum, reduces the strength of the corresponding oscillators, refractive index and electron polarizability. The structural characteristics of crystals were studied by the method of X-ray powder diffraction.
1 article in international journal included in the scientometric databases Scopus and Web of Science, and 3 abstracts of international conferences were published.
Résumé of the 2nd stage:
At this stage of the project, the temperature and spectral dependences of the main refractive indices and birefringence of (NH4)2BeF4 crystals were investigated. It was established that the birefringence of the studied crystals is quite sensitive to the action of uniaxial pressures along the main crystal-physical directions. Spectral (300…700 nm) and temperature (77…300 K) changes of combined piezooptical coefficients of (NH4)2BeF4 crystals were determined and it was found that the nature of their anomalies during phase transitions (changes in the slope of p0im(Т) curves) corresponds to the nature of anomalous changes in refractive indices and birefringence.
2 articles in international journals included in the scientometric databases Scopus and Web of Science, 2 conference papers and 7 abstracts of international conferences were published.
Scientific interests and researches of the Department staff are:
Candidate of Physical and Mathematical Sciences Iryna Novosad published a scientific monograph: Novosad S. S. Luminescence of Materials Based on CdBr2 and ZnO / S. S. Novosad, I. S. Novosad, B. I. Тurko, I. D. Karbovnyk. – Chisinau : Scholars’ Press, 2021. – 132 p. (ISBN: 978-613-8-95655-6).
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