Article
Materials Science, Multidisciplinary
Yuting Chang, Junfeng Wang, Wei Wang, Congbin Liu, Bin You, Meifeng Liu, Shuhan Zheng, Mengyi Shi, Chengliang Lu, Jun-Ming Liu
Summary: We report the discovery of an ultrarobust linear magnetoelectric memory and a significant training effect in a honeycomb antiferromagnet Co4Nb2O9, which can be controlled by magnetic and electric fields. The memory states exhibit distinct linear magnetoelectric coefficients across a wide range of magnetic fields. The evolution of antiferromagnetic domains is believed to be responsible for the versatile memory behaviors observed in multiferroics and other magnetoelectric materials like topological insulators. The compensated antiferromagnetic phase, which is essential for magnetoelectric memory, may enable the integration of unique advantages of antiferromagnetic spintronics such as ultrahigh density and ultrafast switching.
Article
Materials Science, Multidisciplinary
J. H. Zhang, L. Lin, Y. S. Tang, G. Z. Zhou, L. Huang, X. Y. Li, G. Y. Li, S. H. Zheng, M. F. Liu, X. M. Liu, Z. B. Yan, X. K. Huang, C. Chen, X. P. Jiang, J. -M Liu
Summary: In this study, the tunability of the magnetoelectric (ME) effect in Co-substituted Ni3TeO6 crystals was investigated. The ME effect in Ni2CoTeO6 and NiCo2TeO6 single crystals with incommensurate antiferromagnetic helical structure was found to be significantly different from that in Ni3TeO6. The Co2+ substitution resulted in a giant electric polarization and a remarkable modulation of the linear ME coefficient. This work provides insights into the high tunability of the ME effect in Ni3TeO6 polar magnets.
Article
Chemistry, Physical
Y. M. Xie, C. C. Wang
Summary: The memory effect of magnetoelectric coupling is observed in Co4Ta2O9, and it can be manipulated by adjusting the applied magnetic field and polarization process.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
I. V. Lukin, A. G. Sotnikov
Summary: We have developed a method for variational optimization of the infinite projected entangled pair states on the honeycomb lattice, using automatic differentiation of the honeycomb-lattice corner transfer matrix renormalization group. We applied this method to the antiferromagnetic Heisenberg spin-1/2 and ferromagnetic Kitaev models on the honeycomb lattice. The developed formalism provides quantitatively accurate results for the main physical observables and has potential for further extensions.
Article
Physics, Multidisciplinary
Yao-Dong Wu, Wei-Wei Duan, Qiu-Yue Li, Yong-Liang Qin, Zhen-Fa Zi, Jin Tang
Summary: The magnetic and magnetocaloric properties of GdInO3 were studied. A reversible magnetocaloric effect was observed, and it showed a large magnetic entropy change and relative cooling power at lower temperatures.
Article
Materials Science, Ceramics
Yuanmiao Xie, Fei Guo, Hongda Li, Boran Tao, Haixin Chang
Summary: In the honeycomb antiferromagnet Co4Nb2O9, the magnetoelectric (ME) coupling does not increase monotonously with the poling magnetic field strength, but reaches maxima around 10 kGs due to opposite dependences of domain wall thickness and energetically preferred domain's proportion on the poling magnetic field. Interestingly, ME coupling still exists when the sample returns to the paramagnetic phase after being poled and then reenters the antiferromagnetic phase without being poled, attributed to the presence of ME domain nucleation centers in the paramagnetic phase.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Swarnamayee Mishra, Premakumar Yanda, A. Sundaresan
Summary: In a quasi-two-dimensional planar antiferromagnet BaNi2(PO4)(2), a long-range antiferromagnetic ordering of Ni2+ ions at T-N = 24 K was observed. Interestingly, an electric polarization proportional to the applied magnetic fields was induced at T-N, demonstrating the linear magnetoelectric effect with a coupling coefficient of 1.67 ps/m in BaNi2(PO4)(2). The magnetic symmetry associated with the magnetoelectric effect (1) over bar' allows all tensor elements of the magnetoelectric susceptibility.
Article
Materials Science, Multidisciplinary
Jun Kikuchi, Takayuki Kamoda, Nobuyoshi Mera, Yodai Takahashi, Kouji Okumura, Yukio Yasui
Summary: The research reports on the results of 23Na NMR in the honeycomb lattice magnet Na2Co2TeO6, indicating the presence of different spin phases. In the antiferromagnetic phase, a transition between spin disordered phase and spin wave excitations was observed. Near the critical temperature, a field-dependent spin stiffness constant was found, reflecting the suppression of energy scales associated with magnetic field and frustration effects.
Article
Materials Science, Multidisciplinary
Junkai Yang, Dan Su, Jincheng He, Yu Ji, Qinwen Guo, Ying Meng, Xiangfei Li, Luyao Wang, Xi Shen, Yuan Yao, Youwen Long, Young Sun, Richeng Yu
Summary: In this study, single-crystal (Fe0.95Mg0.05)2Mo3O8 was successfully synthesized, which exhibits a linear magnetoelectric effect in the antiferromagnetic ground state and shows a significantly improved magnetoelectric coefficient. The spin-lattice coupling and the exchange-striction mechanism are believed to play a crucial role in creating the giant magnetoelectric effect.
Article
Multidisciplinary Sciences
Sahar Satoori, Saeed Mahdavifar, Javad Vahedi
Summary: The ground state phase diagram of the dimerized spin-1/2 XX honeycomb model in the presence of a transverse magnetic field is investigated using numerical exact techniques. The quantum correlations, concurrence, and quantum discord among nearest-neighbor spins are analyzed, demonstrating their ability to capture the position of quantum critical points and provide information on long-ranged critical correlations. Additionally, a magnetic-entanglement behavior starting from the saturation field is addressed.
SCIENTIFIC REPORTS
(2022)
Article
Physics, Condensed Matter
Gavin Hester, T. N. DeLazzer, S. S. Lim, C. M. Brown, K. A. Ross
Summary: C-Er2Si2O7, a rare-earth pyrosilicate compound, exhibits a distorted honeycomb lattice structure with antiferromagnetic ordering at 2.3 K. Neutron diffraction measurements confirm the magnetic properties of this compound.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Physics, Multidisciplinary
David R. Saykin, Camron Farhang, Erik D. Kountz, Dong Chen, Brenden R. Ortiz, Chandra Shekhar, Claudia Felser, Stephen D. Wilson, Ronny Thomale, Jing Xia, Aharon Kapitulnik
Summary: This study reports high-resolution polar Kerr effect measurements on CsV3Sb5 single crystals to search for evidence of spontaneous time-reversal symmetry breaking below the charge-order transition. Utilizing two different versions of zero-area loop Sagnac interferometers operating at 1550 nm wavelength, the researchers found no observable Kerr effect within the noise floor limit. Simultaneous coherent reflection ratio measurements confirmed the sharpness of the charge-order transition, suggesting that time-reversal symmetry is unlikely to be broken in the charge ordered state in CsV3Sb5.
PHYSICAL REVIEW LETTERS
(2023)
Article
Materials Science, Multidisciplinary
J. H. Zhang, Y. S. Tang, L. Lin, L. Y. Li, G. Z. Zhou, B. Yang, L. Huang, X. Y. Li, G. Y. Li, S. H. Zheng, M. F. Liu, M. Zeng, D. Wu, Z. B. Yan, X. K. Huang, C. Chen, X. P. Jiang, J. -M Liu
Summary: In this study, the anisotropic magnetoelectric effect, electric polarization reversal, and nonlinear magnetoelectric effect of the honeycomb-based antiferromagnet Fe4Nb2O9 were systematically investigated. The phase diagram was extended down to 10 K. It was found that electric polarization reversal occurred when the magnetic field was applied along the [110] and [1-10] directions, but not along the [001] direction. Angular-dependent probing revealed a rotation of the induced electric polarization around the c axis upon the rotation of magnetic field. The electric polarization responses and magnetoelectric coupling were explained by the metal-ligand hybridization mechanism. This work is important for understanding magnetoelectric coupling in A4M2O9 honeycomb magnets.
Article
Engineering, Electrical & Electronic
Raja Altaf U. Rahman, Nazir Ahmad Mala, Mehraj ud Din Rather, Gowher Hameed Rather, Ishfaq Ahmad Parray, Asma Shahzadi, Sonabar Saqib, Shahid Husain, Basharat Want
Summary: Honeycomb-layered YCrTeO6 with hexagonal structure and P3 space group is synthesized by the solid-state reaction method. The single-phase YCrTeO6 exhibits paramagnetic behavior down to 10 K and weak antiferromagnetism at room temperature. Annealing of the phase-pure material at 1323 K leads to the crystallization of a secondary phase YCrO3. The presence of room-temperature antiferromagnetism, ferroelectricity, and magnetoelectric coupling in YCrTeO6 makes it a potential candidate for magnetoelectric devices.
JOURNAL OF ELECTRONIC MATERIALS
(2023)
Article
Mechanics
Yang Shi, Baoxin Lei, Yongkun Wang, Junjie Ye
Summary: This paper presents an analytical model to evaluate the self-bias magnetoelectric effect of magnetization-graded magnetoelectric composites under extensional-bending coupled vibration. The results indicate the availability of self-bias magnetic field in the composites, which can enhance the self-bias magnetoelectric coupling and adjust the resonance frequency by applying tensile stress or increasing the thickness of the high-permeability layer.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Electrical & Electronic
Henrik Thoma, Vladimir Hutanu, Rajesh Dutta, Arsen Gukasov, Vilmos Kocsis, Yusuke Tokunaga, Yasujiro Taguchi, Yoshinori Tokura, Istvan Kezsmarki, Georg Roth, Manuel Angst
Summary: The Dzyaloshinskii-Moriya interaction (DMI) is an antisymmetric phenomenon that induces magnetic moment canting and the formation of magnetic textures. Through focused polarized neutron diffraction (PND) study, we have successfully determined the sign of DMI in the unconventional multiferroic material Ba2CoGe2O7 and revealed detailed information about its magnetic structure.
IEEE TRANSACTIONS ON MAGNETICS
(2022)
Article
Chemistry, Physical
Thorben Petersen, Lilian Prodan, Vladimir Tsurkan, Hans-Albrecht Krug Von Nidda, Istvan Kezsmarki, Ulrich K. Roessler, Liviu Hozoi
Summary: The study focuses on spin-orbit quartet ground states, analyzing their role in lacunar spinels and using quantum chemical methods to determine the interaction of spin-orbit couplings and many-body physics related to other molecular-like single-electron levels. Valuable insights into the important role of vibronic couplings were provided by comparing magnetic susceptibility data with calculated g factors.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Physics, Condensed Matter
Markus Prinz-Zwick, Bertalan G. Szigeti, Thomas Gimpel, Dieter Ehlers, Vladimir Tsurkan, Andrey O. Leonov, Bjoern Miksch, Marc Scheffler, Ioannis Stasinopoulos, Dirk Grundler, Istvan Kezsmarki, Norbert Buettgen, Hans-Albrecht Krug Von Nidda
Summary: The electronic structure and collective magnetic excitations of lacunar spinels GaV4S8 and GaV4Se8 were characterized using magnetic resonance techniques, revealing cycloidal, Neel-type skyrmion lattice, and ferromagnetically polarized phases. Ga-71 nuclear magnetic resonance (NMR) provided local detection of magnetic properties, while broadband electron spin resonance (ESR) allowed identification of various magnetic modes in skyrmion-lattice phases through theoretical simulations.
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Adam Butykai, Korbinian Geirhos, David Szaller, Laszlo F. Kiss, Laszlo Balogh, Maria Azhar, Markus Garst, Lisa DeBeer-Schmitt, Takeshi Waki, Yoshikazu Tabata, Hiroyuki Nakamura, Istvan Kezsmarki, Sandor Bordacs
Summary: Modulated magnetic phases, including the cycloidal and Neel-type skyrmion lattice states, were identified in polar magnets at extended temperature ranges. Non-centrosymmetric magnets with 4d and 5d electron systems exhibit various highly compressed modulated states.
NPJ QUANTUM MATERIALS
(2022)
Article
Multidisciplinary Sciences
Fumiya Sekiguchi, Kestutis Budzinauskas, Prashant Padmanabhan, Rolf B. Versteeg, Vladimir Tsurkan, Istvan Kezsmarki, Francesco Foggetti, Sergey Artyukhin, Paul H. M. van Loosdrecht
Summary: The formation of magnetic order affects spin excitations and transport properties. In this study, the ultrafast spin dynamics in different magnetic phases of GaV4S8 were investigated using time-resolved magneto-optical Kerr effect experiments. The results show that the amplitude of coherent spin precession is enhanced in the skyrmion-lattice phase, indicating phase coexistence across magnetic phase transitions. Furthermore, the incoherent spin relaxation dynamics slows down in the skyrmion-lattice/cycloid phases, leading to a significant decrease in thermal conductivity. This is attributed to the increased magnon scattering off the domain walls formed in abundance in the skyrmion-lattice/cycloid phase. These findings provide insight into the impact of spatial spin structure on ultrafast heat transport in spin systems.
NATURE COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
Lukas Puntigam, Markus Altthaler, Somnath Ghara, Lilian Prodan, Vladimir Tsurkan, Stephan Krohns, Istvan Kezsmarki, Donald M. Evans
Summary: Rewritable nanoelectronics have great potential in fundamental research and technological applications. This study focuses on conductive domain walls and demonstrates enhanced conductivity in narrow-gap correlated insulators due to local strain gradients, expanding the range of materials applicable to domain wall-based nanoelectronics.
ADVANCED ELECTRONIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
P. Basa, B. Fodor, Zs. Nagy, B. Oyunbolor, A. Hajtman, S. Bordacs, I. Kezsmarki, A. Halbritter, A. Orban
Summary: In this study, transmission Mueller matrix ellipsometry was used to investigate hemozoin, a microcrystalline byproduct of malaria parasites. Measurement data was collected for different magnetic field orientations and hemozoin suspension densities, revealing the magnetic alignment of hemozoin crystals and their optical anisotropies. These findings could contribute to the future optimization of detection schemes or optical instruments for diagnostic use.
Article
Multidisciplinary Sciences
Ellen Fogh, Bastian Klemke, Manfred Reehuis, Philippe Bourges, Christof Niedermayer, Sonja Holm-Dahlin, Oksana Zaharko, Jurg Schefer, Andreas B. Kristensen, Michael K. Sorensen, Sebastian Paeckel, Kasper S. Pedersen, Rasmus E. Hansen, Alexandre Pages, Kimmie K. Moerner, Giulia Meucci, Jian-Rui Soh, Alessandro Bombardi, David Vaknin, Henrik. M. Ronnow, Olav F. Syljuasen, Niels B. Christensen, Rasmus Toft-Petersen
Summary: Mixed-anisotropy magnet LiNi1-xFexPO4 demonstrates a two orders of magnitude enhancement of magnetoelectric coupling, unlocking symmetry-forbidden couplings and showing potential for tuning magnetoelectric properties.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
D. Flavian, J. Nagl, S. Hayashida, M. Yan, O. Zaharko, T. Fennell, D. Khalyavin, Z. Yan, S. Gvasaliya, A. Zheludev
Summary: The rare-earth-based magnet Nd3BWO9 is a promising candidate for proximate spin-liquid physics. Comprehensive investigations on single crystals of this material using bulk and microscopic techniques were conducted. Magnetization data shows fractional magnetization plateaus for three different field directions. The magnetic phase diagram reveals multiple domes of magnetic order below 0.3 K. The existence of a commensuration transition of the propagation vector at zero magnetic field is also observed.
Article
Materials Science, Multidisciplinary
Rajesh Dutta, Henrik Thoma, Andrew Sazonov, Balint Nafradi, Martin Meven, Arsen Gukasov, Vilmos Kocsis, Uli Zeitler, Alessandro Puri, Yusuke Tokunaga, Yasujiro Taguchi, Yoshinori Tokura, Sandor Bordacs, Istvan Kezsmaerki, Vladimir Hutanu
Summary: We conducted a study on a multiferroic Sr2CoSi2O7 (SCSO) single crystal using polarized and unpolarized neutron diffraction. Our measurements confirmed the existence of melilite-type tetragonal P4 over bar 21m space group as the parent structure of SCSO at 15 K, but revealed symmetry lowering with the possible orthorhombic Cmm'2' and P212'12' magnetic space groups at 2.3 K. The obtained ordered magnetic moments in both Cmm'2' and P212'12' magnetic space groups were around 2.86 and 2.94 mu B/Co2+ respectively, lying in the ab plane. Furthermore, our spin polarized flipping ratio measurements supported the presence of strong easy-plane spin anisotropy responsible for the in-plane order below TN as indicated by our bulk magnetization data.
Article
Materials Science, Multidisciplinary
L. Prodan, I. Filippova, A. O. Zubtsovskii, S. Shova, S. Widmann, A. A. Tsirlin, I. Kezsmarki, V. Tsurkan
Summary: We investigate the crystal structure, magnetization, and specific heat measurements of single crystals of the hexagonal polar magnet Co2-xZnxMo3O8. It is found that Zn doping can preserve the robust antiferromagnetic behavior in Co2Mo3O8 up to x = 0.55. The observed effects in the lattice parameter, Curie-Weiss temperature, and magnetic entropy can be attributed to the site-selective Zn substitution, which is dependent on the coordination of the Co2+ ions.
Article
Materials Science, Multidisciplinary
F. Schilberth, N. Unglert, L. Prodan, F. Meggle, J. Ebad Allah, C. A. Kuntscher, A. A. Tsirlin, V Tsurkan, J. Deisenhofer, L. Chioncel, I Kezsmaerki, S. Bordacs
Summary: This study investigates the quantum Hall effect and anomalous Hall effect in kagome materials, and probes the band structure features through optical conductivity spectra. The results show that low-energy transitions contribute significantly to the anomalous Hall effect, which is further enhanced by contributions from higher-energy interband transitions. The study also reveals band reconstructions near the Fermi level due to local Coulomb interactions.
Article
Materials Science, Multidisciplinary
L. Peedu, V Kocsis, D. Szaller, B. Forrai, S. Bordacs, I Kezsmarki, J. Viirok, U. Nagel, B. Bernath, D. L. Kamenskyi, A. Miyata, O. Portugall, Y. Tokunaga, Y. Tokura, Y. Taguchi, T. Room
Summary: We investigated the spin excitations of magnetoelectric LiFePO4 using THz absorption spectroscopy and found magnetic-dipole, electric-dipole active, and magnetoelectric resonances. We used a four-spin mean-field model to reproduce the magnetic field dependence of four low-energy modes. The study also observed additional spin excitations at higher frequencies that were not described by the mean-field model.