@article{MTMT:34823661,
	title = {Terahertz spin-wave excitations in the transverse conical phase of BiFeO3},
	url = {https://m2.mtmt.hu/api/publication/34823661},
	author = {Tóth, Boglárka and Farkas, Dániel Gergely and Amelin, K. and Rõõm, T. and Nagel, U. and Udvardi, László and Szunyogh, László and Rózsa, Levente and Ito, T. and Bordács, Sándor},
	doi = {10.1103/PhysRevB.109.144424},
	journal-iso = {PHYS REV B},
	journal = {PHYSICAL REVIEW B},
	volume = {109},
	unique-id = {34823661},
	issn = {2469-9950},
	year = {2024},
	eissn = {2469-9969},
	orcid-numbers = {Amelin, K./0000-0003-4106-5006; Szunyogh, László/0000-0001-7430-3627; Rózsa, Levente/0000-0001-9456-5755; Ito, T./0000-0003-2094-2807; Bordács, Sándor/0000-0003-0420-5997}
}

@article{MTMT:33836337,
	title = {Novel manufacturing method for highly flexible poly(lactic acid) foams and ferroelectrets},
	url = {https://m2.mtmt.hu/api/publication/33836337},
	author = {Vadas, Dániel and Bordácsné Bocz, Katalin and Igricz, Tamás and Volk, János and Bordács, Sándor and Madarász, Lajos and Marosi, György},
	doi = {10.1016/j.aiepr.2023.03.005},
	journal-iso = {ADV INDUST ENGIN POLYMER RES},
	journal = {ADVANCED INDUSTRIAL AND ENGINEERING POLYMER RESEARCH},
	volume = {7},
	unique-id = {33836337},
	issn = {2542-5048},
	abstract = {Poly (lactic acid) (PLA) foams have demonstrated a high variety of functional characteristics, still, the rigidity of this cellular material remains a major limiting factor when it comes to implementation options. In this contribution, PLA foams with outstanding flexibility were created for the first time by a new approach of uniaxial stretching and immediate relaxation following supercritical CO2-assisted extrusion foaming. Instead of improving the resilience of the PLA raw material, structural elasticity of the foam was achieved via altering the deformation mechanism from cell wall collapse or rupture towards reversible and extensive flexural strain. In addition, PLA foams with excellent piezoelectric properties were also achieved via high-voltage corona poling, giving additional function to the lens-like anisotropic foam cells. This foaming technology creates the opportunity to produce PLA piezoelectrets in a way entirely different from the state-of-the-art methods. Correlation between the tensile as well as compression elongations and moduli, cell morphology and longitudinal piezoelectric coefficients (d33) of electretized foam samples were studied. Unprecedented reversible tensile elongations of up to 16% and total elongations of up to 35% were reached, as well as considerable d33 values in the range of 50–320 pC/N were obtained for PLA ferroelectrets.},
	year = {2024},
	pages = {215-225},
	orcid-numbers = {Volk, János/0000-0003-3633-6190; Bordács, Sándor/0000-0003-0420-5997; Marosi, György/0000-0002-4774-2023}
}

@article{MTMT:34069706,
	title = {Broadband magnetic resonance spectroscopy in MnSc2S4},
	url = {https://m2.mtmt.hu/api/publication/34069706},
	author = {Tóth, Boglárka and Amelin, K. and Rõõm, T. and Nagel, U. and Bauernfeind, A. and Tsurkan, V. and Prodan, L. and Krug, von Nidda H.-A. and Scheffler, M. and Kézsmárki, I. and Bordács, Sándor},
	doi = {10.1038/s41598-023-37911-6},
	journal-iso = {SCI REP},
	journal = {SCIENTIFIC REPORTS},
	volume = {13},
	unique-id = {34069706},
	issn = {2045-2322},
	abstract = {Recent neutron scattering experiments suggested that frustrated magnetic interactions give rise to antiferromagnetic spiral and fractional skyrmion lattice phases in MnSc2S4. Here, to trace the signatures of these modulated phases, we studied the spin excitations of MnSc2S4 by THz spectroscopy at 300 mK and in magnetic fields up to 12 T and by broadband microwave spectroscopy at various temperatures up to 50 GHz. We found a single magnetic resonance with frequency linearly increasing in field. The small deviation of the Mn2+ ion g-factor from 2, g = 1.96, and the absence of other resonances imply very weak anisotropies and negligible contribution of higher harmonics to the spiral state. The significant difference between the dc magnetic susceptibility and the lowest frequency ac susceptibility in our experiment implies the existence of mode(s) outside of the measured frequency windows. The combination of THz and microwave experiments suggests a spin gap opening below the ordering temperature between 50 GHz and 100 GHz.},
	keywords = {LIQUID; ELECTRON-SPIN-RESONANCE},
	year = {2023},
	eissn = {2045-2322},
	orcid-numbers = {Bordács, Sándor/0000-0003-0420-5997}
}

@article{MTMT:34039687,
	title = {Nodal-line resonance generating the giant anomalous Hall effect of Co 3 Sn 2 S 2},
	url = {https://m2.mtmt.hu/api/publication/34039687},
	author = {Schilberth, F. and Jiang, M.-C. and Minami, S. and Kassem, M. A. and Mayr, F. and Koretsune, T. and Tabata, Y. and Waki, T. and Nakamura, H. and Guo, G.-Y. and Arita, R. and Kézsmárki, I. and Bordács, Sándor},
	doi = {10.1103/PhysRevB.107.214441},
	journal-iso = {PHYS REV B},
	journal = {PHYSICAL REVIEW B},
	volume = {107},
	unique-id = {34039687},
	issn = {2469-9950},
	year = {2023},
	eissn = {2469-9969},
	orcid-numbers = {Schilberth, F./0000-0003-3019-8575; Jiang, M.-C./0000-0003-1816-4938; Minami, S./0000-0002-2852-3503; Kassem, M. A./0000-0001-8871-6078; Mayr, F./0009-0007-0137-5313; Waki, T./0000-0002-3294-9814; Arita, R./0000-0001-5725-072X; Bordács, Sándor/0000-0003-0420-5997}
}

@article{MTMT:33644692,
	title = {Magnetic structure of the two-dimensional XY antiferromagnet Sr2CoSi2 O7 studied using single-crystal neutron diffraction},
	url = {https://m2.mtmt.hu/api/publication/33644692},
	author = {Dutta, Rajesh and Thoma, Henrik and Sazonov, Andrew and Náfrádi, Bálint and Meven, Martin and Gukasov, Arsen and Kocsis, Vilmos and Zeitler, Uli and Puri, Alessandro and Tokunaga, Yusuke and Taguchi, Yasujiro and Tokura, Yoshinori and Bordács, Sándor and Kézsmárki, István and Hutanu, Vladimir},
	doi = {10.1103/PhysRevB.107.014420},
	journal-iso = {PHYS REV B},
	journal = {PHYSICAL REVIEW B},
	volume = {107},
	unique-id = {33644692},
	issn = {2469-9950},
	year = {2023},
	eissn = {2469-9969},
	orcid-numbers = {Bordács, Sándor/0000-0003-0420-5997}
}

@article{MTMT:33644684,
	title = {Spin-Lattice and Magnetoelectric Couplings Enhanced by Orbital Degrees of Freedom in Polar Multiferroic Semiconductors},
	url = {https://m2.mtmt.hu/api/publication/33644684},
	author = {Kocsis, V. and Tokunaga, Y. and Rõõm, T. and Nagel, U. and Fujioka, J. and Taguchi, Y. and Tokura, Y. and Bordács, Sándor},
	doi = {10.1103/PhysRevLett.130.036801},
	journal-iso = {PHYS REV LETT},
	journal = {PHYSICAL REVIEW LETTERS},
	volume = {130},
	unique-id = {33644684},
	issn = {0031-9007},
	year = {2023},
	eissn = {1079-7114},
	orcid-numbers = {Bordács, Sándor/0000-0003-0420-5997}
}

@article{MTMT:33548398,
	title = {Analysis of malaria infection byproducts with Mueller matrix transmission ellipsometry},
	url = {https://m2.mtmt.hu/api/publication/33548398},
	author = {Basa, Péter and Fodor, B. and Nagy, Zs. and Oyunbolor, B. and Hajtman, A. and Bordács, Sándor and Kézsmárki, István and Halbritter, András Ernő and Orbánová, Agnesa},
	doi = {10.1016/j.tsf.2022.139637},
	journal-iso = {THIN SOLID FILMS},
	journal = {THIN SOLID FILMS},
	volume = {766},
	unique-id = {33548398},
	issn = {0040-6090},
	abstract = {In this work, hemozoin, a microcrystalline byproduct of the malaria parasites was studied by transmission Mueller matrix ellipsometry. Measurement data was collected for different magnetic field orientations and as a function of the density of the hemozoin suspension. Our ellipsometric study demonstrates the magnetic alignment of the hemozoin crystals via the corresponding large linear birefringence and dichroism signals. These results reveal optical anisotropies of this material, which could be utilized for future optimization of detection schemes or optical instruments for diagnostic use.},
	keywords = {IRON; Environment; Materials Science, Multidisciplinary; Physics, Applied; Materials Science, Coatings & Films},
	year = {2023},
	eissn = {1879-2731},
	orcid-numbers = {Basa, Péter/0000-0003-1317-1709; Bordács, Sándor/0000-0003-0420-5997; Halbritter, András Ernő/0000-0003-4837-9745}
}

@article{MTMT:33189817,
	title = {Terahertz spectroscopy of spin excitations in magnetoelectric LiFePO4 in high magnetic fields},
	url = {https://m2.mtmt.hu/api/publication/33189817},
	author = {Peedu, L. and Kocsis, V. and Szaller, Dávid and Forrai, B. and Bordács, Sándor and Kézsmárki, István and Viirok, J. and Nagel, U. and Bernáth, B. and Kamenskyi, D.L. and Miyata, A. and Portugall, O. and Tokunaga, Y. and Tokura, Y. and Taguchi, Y. and Rõõm, T.},
	doi = {10.1103/PhysRevB.106.134413},
	journal-iso = {PHYS REV B},
	journal = {PHYSICAL REVIEW B},
	volume = {106},
	unique-id = {33189817},
	issn = {2469-9950},
	year = {2022},
	eissn = {2469-9969},
	orcid-numbers = {Szaller, Dávid/0000-0003-4451-118X; Bordács, Sándor/0000-0003-0420-5997}
}

@article{MTMT:33106237,
	title = {Magneto-optical detection of topological contributions to the anomalous Hall effect in a kagome ferromagnet},
	url = {https://m2.mtmt.hu/api/publication/33106237},
	author = {F., Schilberth and N., Unglert and L., Prodan and F., Meggle and J., Ebad Allah and C. A., Kuntscher and A. A., Tsirlin and V., Tsurkan and J., Deisenhofer and L., Chioncel and I., Kézsmárki and Bordács, Sándor},
	doi = {10.1103/PhysRevB.106.144404},
	journal-iso = {PHYS REV B},
	journal = {PHYSICAL REVIEW B},
	volume = {106},
	unique-id = {33106237},
	issn = {2469-9950},
	abstract = {A single ferromagnetic kagome layer is predicted to realize a Chern insulator with quantized Hall conductance, which upon stacking can become a Weyl semimetal with a large anomalous Hall effect (AHE) and magnetooptical activity. Indeed, in the kagome bilayer material Fe3Sn2, a large AHE was detected. In order to directly probe the responsible band structure features, we measure the optical Hall conductivity spectra in addition to the diagonal optical conductivity over a broad frequency range. Since the former is the energy selective measure of the intrinsic contributions to the AHE, we identify their common origin with the help of momentum- and banddecomposed optical conductivity spectra obtained from first principles calculations. We find that low-energy transitions, tracing "helical volumes" in momentum space reminiscent of the formerly predicted helical nodal lines, substantially contribute to the AHE, which is further increased by contributions from multiple higherenergy interband transitions. Our study also reveals that in this kagome magnet, local Coulomb interactions lead to remarkable band reconstructions near the Fermi level.},
	year = {2022},
	eissn = {2469-9969},
	orcid-numbers = {Bordács, Sándor/0000-0003-0420-5997}
}

@article{MTMT:32775065,
	title = {Squeezing the periodicity of Néel-type magnetic modulations by enhanced Dzyaloshinskii-Moriya interaction of 4d electrons},
	url = {https://m2.mtmt.hu/api/publication/32775065},
	author = {Butykai, Ádám and Geirhos, K. and Szaller, Dávid and Kiss, László Ferenc and Balogh, L. and Azhar, M. and Garst, M. and DeBeer-Schmitt, L. and Waki, T. and Tabata, Y. and Nakamura, H. and Kézsmárki, I. and Bordács, Sándor},
	doi = {10.1038/s41535-022-00432-y},
	journal-iso = {NPJ QUANTUM MATER},
	journal = {NPJ QUANTUM MATERIALS},
	volume = {7},
	unique-id = {32775065},
	abstract = {In polar magnets, such as GaV4S8, GaV4Se8 and VOSe2O5, modulated magnetic phases namely the cycloidal and the Néel-type skyrmion lattice states were identified over extended temperature ranges, even down to zero Kelvin. Our combined small-angle neutron scattering and magnetization study shows the robustness of the Néel-type magnetic modulations also against magnetic fields up to 2 T in the polar GaMo4S8. In addition to the large upper critical field, enhanced spin-orbit coupling stabilize cycloidal, Néel skyrmion lattice phases with sub-10 nm periodicity and a peculiar distribution of the magnetic modulation vectors. Moreover, we detected an additional single-q state not observed in any other polar magnets. Thus, our work demonstrates that non-centrosymmetric magnets with 4d and 5d electron systems may give rise to various highly compressed modulated states.},
	year = {2022},
	eissn = {2397-4648},
	orcid-numbers = {Szaller, Dávid/0000-0003-4451-118X; Bordács, Sándor/0000-0003-0420-5997}
}