Institute of High Pressure Physics

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.

Dear Colleagues,

We are pleased to invite you to the next IHPP PAS Seminar on Nitride Semiconductors, - this time expanding the focus to include other semiconductors. The presentation will be held in a hybrid mode – at the seminar room in New Technologies building, Al. Prymasa Tysiąclecia 98, and through Zoom platform (to get the link, please contact us at nitride_seminar@mail.unipress.waw.pl ).

The talk is scheduled on Tuesday 29.04.2025 at 11:00 CEST.

Speaker: Prof. Dr. Eicke R. Weber (European Solar Manufacturing Council, ESMC)

Title: Photovoltaics as a Key Pillar of Our Future Energy Supply

Sincerely,

Tadeusz Suski
Piotr Perlin
Anna Kafar

We are proud to announce that an employee of our Institute, Dr. Konrad Sakowski, has been recognized by the Rector of the University of Warsaw for inspiring scientific research and outstanding achievements. The ceremonial presentation of diplomas took place at the Kazimierzowski Palace on Wednesday, April 2., 2025. Dr. Konrad Sakowski, in addition to his scientific work at the IWC PAN, is also an assistant professor at the Faculty of Mathematics, Computer Science and Mechanics of the University of Warsaw.

We congratulate Konrad on this distinction and wish him continued success in his work. We are proud that he is part of our team.

Institute of High Presdsure Physics PAS and the Polish Society for Crystal Growth (PTWK) is pleased to invite all scientists involved in bulk crystal growth, epitaxy and characterization to the Workshop on Bulk Crystal Growth and Epitaxy (WBCGE), that will take place at our Institute (IWC PAN) in Warsaw on May 15-16, 2025.

WBCGE Workshop will be chaired by Prof. Michał Leszczyński (PTWK President, IWC PAN) and Prof. Dorota Pawlak (CEO of Ensemble3). It will be an excellent opportunity for scientific development, as well as to expand the network of contacts in the rapidly developing field of crystal growth and epitaxy.

• Venue: Institute of High Pressure Physics, Polish Academy of Sciences (IWC PAN), 98 Prymasa Tysiąclecia Avenue, Warsaw
• Date: May 15-16, 2025
• Abstract submission deadline extended to March 31, 2025
• Participation fee: PLN 650 (includes two lunches and coffee breaks)
• All the details: https://wbcge2025.odoo.com