Publications de Bálint Náfrádi

Magnetic structure of the magnetoelectric material Ba2MnGe2O7

A detailed investigation of Ba2MnGe2O7 was performed in its low-temperature magnetoelectric state combining neutron diffraction with magnetization measurements on single crystals. In the paramagnetic state at 10 K, polarized neutron diffraction was applied ...

2023

Magnetic structure of the two-dimensional XY antiferromagnet Sr2CoSi2O7 studied using single-crystal neutron diffraction

Bálint Náfrádi

We report a combined polarized and unpolarized neutron diffraction study on a multiferroic Sr2CoSi2O7 (SCSO) single crystal below and above the antiferromagnetic ordering temperature TN = 6.5 K. Unpolarized neutron diffraction measurements at 15 K confirm ...

AMER PHYSICAL SOC2023

Ultralong 100 ns spin relaxation time in graphite at room temperature

László Forró, Bálint Náfrádi, Péter Szirmai, Bence Gábor Márkus

Graphite has been intensively studied, yet its electron spins dynamics remains an unresolved problem even 70 years after the first experiments. The central quantities, the longitudinal (T-1) and transverse (T-2) relaxation times were postulated to be equal ...

Nature Portfolio2023

Topological Analysis of the Experimental Electron Density in Multiferroic Antiferromagnet Ba2MnGe2O7

Bálint Náfrádi

In the field of magnetoelectric coupling, especially via the spin-dependent metal-ligand d-p hybridization mechanism found in multiferroic Ba2MGe2O7 (M = Mn, Co), detailed knowledge of the microscopic structural parameters is essential, also for the theore ...

Institute of Electrical and Electronics Engineers2022

Ultrasensitive 3D Aerosol-Jet-Printed Perovskite X-ray Photodetector

László Forró, Endre Horvath, Alla Arakcheeva, Bálint Náfrádi, Márton Kollár, Pavao Roko Andricevic, Anastasiia Glushkova

X-ray photon detection is important for a wide range of applications. The highest demand, however, comes from medical imaging, which requires cost-effective, high-resolution detectors operating at low-photon flux, therefore stimulating the search for novel ...

2021

Hybrid halide perovskite neutron detectors

László Forró, Andreas Pautz, Endre Horvath, Andrzej Sienkiewicz, Pavel Frajtag, Bálint Náfrádi, Márton Kollár, Pavao Roko Andricevic

Interest in fast and easy detection of high-energy radiation (x-, gamma-rays and neutrons) is closely related to numerous practical applications ranging from biomedicine and industry to homeland security issues. In this regard, crystals of hybrid halide pe ...

Nature Portfolio2021

Intermolecular Resonance Correlates Electron Pairs Down a Supermolecular Chain: Antiferromagnetism in K-Doped p-Terphenyl

László Forró, Bálint Náfrádi, Péter Szirmai

Recent interest in potassium-doped p-terphenyl has been fueled by reports of superconductivity at T-c values surprisingly high for organic compounds. Despite these interesting properties, studies of the structure-function relationships within these materia ...

AMER CHEMICAL SOC2020

Tuning ferromagnetism at room temperature by visible light

László Forró, Endre Horvath, Bálint Náfrádi, Andrea Pisoni, Massimo Spina, Péter Szirmai, Xavier François Mettan

Most digital information today is encoded in the magnetization of ferromagnetic domains. The demand for ever-increasing storage space fuels continuous research for energy-efficient manipulation of magnetism at smaller and smaller length scales. Writing a b ...

National Academy of Sciences2020

Light-induced charge transfer at the CH3NH3PbI3/TiO2 interface-a low-temperature photo-electron paramagnetic resonance assay

László Forró, Endre Horvath, Andrzej Sienkiewicz, Bálint Náfrádi, Philippe Bugnon, Péter Szirmai, Márton Kollár, Pavao Roko Andricevic, Anastasiia Glushkova, Konstantins Mantulnikovs

The performance of organic-inorganic metal halide perovskites-based (MHPs) photovoltaic devices critically depends on the design and material properties of the interface between the light-harvesting MHP layer and the electron transport layer (ETL). Therefo ...

2020

Kilogram-Scale Crystallogenesis of Halide Perovskites for Gamma-Rays Dose Rate Measurements

László Forró, Andreas Pautz, Endre Horvath, Andrzej Sienkiewicz, Vincent Pierre Lamirand, Pavel Frajtag, Bálint Náfrádi, Márton Kollár, Pavao Roko Andricevic

Gamma-rays (gamma-rays), wherever present, e.g., in medicine, nuclear environment, or homeland security, due to their strong impact on biological matter, should be closely monitored. There is a need for simple, sensitive gamma-ray detectors at affordable p ...

2020