Institute of High Pressure Physics

Dnia 26 maja 2025 r. (poniedziałek) o godz. 13:00 w sali seminaryjnej Instytutu Wysokich Ciśnień Polskiej Akademii Nauk w Warszawie, ul. Sokołowska 29/37, odbędzie się publiczna obrona rozprawy doktorskiej mgr inż. Joanny Łoś.

Temat rozprawy: „Charakterystyka zjawisk przedprzejściowych i dynamiki w materiałach ciekłokrystalicznych i ich nanokoloidach”

Pełna treść zawiadomienia

Rozprawa doktorska i recenzje dostępne są na stronie BIP IWC PAN.

The National Center for Research and Development (NCBiR) as the Intermediate Institution for Priority I FENG 2021 has completed the evaluation of projects submitted in the call no. FENG.01.01-IP.01-005/23 – SMART Path Projects implemented in consortia. The projects were applied for by consortia with or without the participation of a large enterprise. In the latter category, the first place in the ranking list of co-financed projects was taken by the project implemented in the consortium SEEN Semiconductors Sp. z o. o. and the group of Prof. Michał Leszczyński from the NL-12 Laboratory of Semiconductor Characterization.

There are 51 projects (out of 566 applications) that received co-financing for the amount of PLN 686,870,078.42.

Project Title: Conductive GaN/AlGaN/SiC structures for the construction of new generations of vertical electronic devices. Project acronym: "TranzGaN"

The aim of the project is to develop a technology for the growth of a conductive AlGaN:Si buffer on SiC substrates using the MOVPE method. For this purpose, the flow of reagents, temperature, growth pressure and disorientation of SiC substrates will be optimized. The result of this is to prepare a buffer layer with good electrical conductivity and the lowest possible dislocation density in the GaN layer grown on this buffer. This will allow for the production of epitaxial structures of vertical devices such as CAVET transistors, p-i-n diodes or laser diodes, which will significantly expand the scientific experience of the Institute.

Project value: PLN 4,455,429.57

European Funds contribution: PLN 3,752,662.00

Dnia 20 maja 2025 r. (wtorek) o godz. 14.00 w sali seminaryjnej Instytutu Wysokich Ciśnień Polskiej Akademii Nauk w Warszawie, ul. Sokołowska 29/37, odbędzie się publiczna obrona rozprawy doktorskiej mgr. inż. Jakuba Kalabińskiego.
Temat rozprawy: „Charakterystyka równowag fazowych w mieszaninach o ograniczonej mieszalności z wykorzystaniem nowej, autorskiej metody określenia krzywych współistnienia faz”

Pełna treść zawiadomienia

Rozprawa doktorska i recenzje dostępne są na stronie BIP IWC PAN.

FeSe is the simplest iron-based superconductor and has a layered structure with alternating Fe and Se layers. Dr. Singh's research group from our Institute has studied the chemical pressure effect by substitution of the Pr element at Fe sites and As-substitution at Se-sites in FeSe compound. Conventional synthesis process (CSP) at ambient pressure and high-pressure growth technique were used. Interestingly, Pr doping at Fe sites preserves T_c^onset and improves J_c of FeSe_0.5Te_0.5 regardless of the doping contents and growth conditions. More detail about this study can be found in the recently published paper by: Priya Singh, Manasa Manasa, Mohammad Azam, Tatiana Zajarniuk, Svitlana Stelmakh, Taras Palasyuk, Jan Mizeracki, Tomasz Cetner, Andrzej Morawski, Cezariusz Jastrzębski, Michał Wierzbicki, Shiv J. Singh entitled “Praseodymium doping effect on the superconducting properties of FeSe_0.5Te_0.5 bulks under ambient and high-pressure growth conditions” Physica C: Superconductivity and its Applications (Elsevier) 633, 1354729 (2025); https://doi.org/10.1016/j.physc.2025.1354729

Figure: The variation of (a) the onset transition temperature (T_c) (b) the transition width (ΔT) (c) the room temperature resistivity (ρ_300K) (d) residual resistivity ratio (RRR = ρ_300K / ρ_20K) (e) the critical current density (J_c) at 7 K for H = 0 T (closed symbol) and 3 T (open symbol) for Pr_xFe_1-xSe_0.5Te_0.5 bulks prepared by high pressure growth method with respect to the nominal contents (x) of Pr substitutions or Gd- additions.

In the second research paper, Dr. Singh’s research group has concluded their findings on the effects of As-substitution at Se sites in the FeSe system. The observed superconducting transition temperature is approximately 12 K, which is higher than that of the parent compound FeSe_1-x. This paper is published by: Priya Singh, Manasa Manasa, Mohammad Azam, Tatiana Zajarniuk, Konrad Kwatek, Tomasz Cetner, Andrzej Morawski, Jan Mizeracki and Shiv J. Singh entitled “Synthesis and characterizations of arsenic doped FeSe bulks” Journal of Superconductivity and Novel Magnetism 38, 109 (2025) https://doi.org/10.1007/s10948-025-06952-5

Congratulations to Dr. Eng. Aleksander Szpakiewicz-Szatan on receiving his academic title. On March 21, 2025, he successfully defended his doctoral dissertation at the Faculty of Physics of the Warsaw University of Technology (WUT), titled: "Nanocomposites from pressure-formed sodium-phosphate and bismuth glasses for applications in energy storage and conversion devices." A summary of the dissertation is available at the provided link. More information here.

Supervisors: Prof. Jerzy Garbarczyk, (Faculty of Physics, Warsaw University of Technology) and Prof. Sylwester Rzoska (Institute of High Pressure Physics, Polish Academy of Sciences).

The conferment of the PhD degree was approved today (April 24, 2025), by the Scientific Discipline Council of the Faculty of Physics, WUT.

The dissertation was developed as part of an ongoing collaboration between the NL-10 Laboratory (X-Press Matter) at the Institute of High Pressure Physics, PAS, and the Solid State Ionics Division of the Faculty of Physics, WUT. This collaboration will continue under a joint research grant.