Instytut Fizyki Molekularnej Polskiej Akademii Nauk

Nonanalytic term of the Landau functional determines the Binder cumulant of magnetization in nonequilibrium Curie-Weiss model.

K. Ptaszyński, M. Esposito
Nonanalytic Landau functionals shaping the finite-size scaling of fluctuations and response functions in and out of equilibrium
Physical Review E 111, 044142 (2025)
Quenched-in disorder is responsible for the emergence of ferromagnetism in Ce(Fe_0.9Co_0.1)₂ compound. AFM and FM components are visible at low temperatures.

A. Musiał, M. Pugaczowa-Michalska, N. Lindner, Z. Śniadecki
Emergence of Ferromagnetic State Due to Structural Disorder in Pseudo-binary Ce(Fe_0.9Co_0.1)₂ Compound
Metallurgical and Materials Transactions A Volume 56, Issue 6 (2025)
Ferrimagnetic Tb/Co films patterned with Ga+ ions prove to be good substrates for magnetophoresis of superparamagnetic particles.

M. Urbaniak, D. Kiphart, M. Matczak, F. Stobiecki, G.D. Chaves-O’Flynn, P. Kuświk
Ferrimagnetic Tb/Co multilayers patterned by ion bombardment as substrates for magnetophoresis
Sci Rep 14, 23771 (2024)
The energy-dependent relaxation times of electrons and holes in Bi-Sb alloys provide critical insights for optimizing thermoelectric performance and represent a significant step toward high-efficiency p-type devices.

R. Orenstein, K Ciesielski, K. Synoradzki, J. Qu, F.A. Bipasha, L.C. Gomes, J.M. Adamczyk, S. Berger, E. Ertekin, E.S. Toberer
Complex thermoelectric transport in Bi-Sb alloys
Applied Phyics. Review 12, 011409 (2025)
Upstream and downstream concentrations of ³ $He$ He as a function of the filtration time. (a) upstream concentration for YBCO-123 as compared to MWCNTs at 55 mW heater power. (b) upstream and downstream ³ $He$ He concentrations measured simultaneously, black arrows mark the appearance of the lambda transition and switching on the heater to drive the fountain effect. Insert shows the mass spectrum with additional arrows indicating the ³ $He$ He and ⁴He $^{4} He$ concentrations.

W. Kempiński, P. Banat, M. Kempiński, Z. Trybuła, J. Niechciał, M. Chorowski, J. Poliński, K. Chołast
When superfluidity meets superconductivity in the extraction of 3He isotope from liquid helium
Scientific Reports 15, 22822 (2025)
Nonequilibrium responses determine the current covariance in Coulomb-coupled quantum dots.

T. Aslyamov, K. Ptaszyński, M. Esposito
Nonequilibrium Fluctuation-Response Relations: From Identities to Bounds
Physical Review Letter 134, 157101 (2025)
Ion bombardment creates easy diffusion paths which results in preferential oxidation of Tb, shifting compensation point and spin reorientation transition to higher Tb concentrations.

D. Kiphart, M. Krupiński, M. Mitura-Nowak, P.P. Michałowski, M. Kowacz, M. Schmidt, F. Stobiecki, G.D. Chaves-O’Flynn, P. Kuświk
Origin of ion bombardment induced Tb oxidation in Tb/Co multilayers
Applied Surface Science Vol. 685, 15 March 2025, 162090 (2025)
Effects of coupling between electrons and intramolecular vibrations (vibronic effects) in the IR spectra of (EDT-TTF-I₂)₂TCNQF_n (n = 0, 1, 2) donor-acceptor complexes

A. Frąckowiak, R. Świetlik, I. Olejniczak, O. Jeannin, M. Fourmigué
Electron–molecular vibration coupling in trimerized isostructural mixed-stack complexes (EDT-TTF-I₂)₂TCNQF_n (n=0, 1, 2)
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy Volume 329 (2025)