Article
Materials Science, Multidisciplinary
Wei Niu, Zhi Cao, Yile Wang, Zhenqi Wu, Xiaoqian Zhang, Weibo Han, Lujun Wei, Lixia Wang, Yongbing Xu, Youming Zou, Liang He, Yong Pu
Summary: This study explores the rarely observed antisymmetric magnetoresistance in thickness-inhomogeneous nanodevices compared to the symmetric magnetoresistance in thickness-uniform samples. Variations in thickness lead to distinct coercive fields in different regions, generating eddy currents near the thickness boundary during magnetic switching and causing unexpected antisymmetry in longitudinal resistance. This work provides insights and potential device applications in thickness-variation 2D ferromagnetic materials that have been overlooked in previous research.
Article
Multidisciplinary Sciences
You Ba, Shihao Zhuang, Yike Zhang, Yutong Wang, Yang Gao, Hengan Zhou, Mingfeng Chen, Weideng Sun, Quan Liu, Guozhi Chai, Jing Ma, Ying Zhang, Huanfang Tian, Haifeng Du, Wanjun Jiang, Cewen Nan, Jia-Mian Hu, Yonggang Zhao
Summary: Our work demonstrates the electric-field control of skyrmions through strain-mediated magnetoelectric coupling in ferromagnetic/ferroelectric multiferroic heterostructures. Experimental results show non-volatile creation and annihilation of multiple skyrmions, indicating potential for more energy-efficient spintronics.
NATURE COMMUNICATIONS
(2021)
Article
Physics, Applied
Hiroto Masuda, Takeshi Seki, Yuta Yamane, Rajkumar Modak, Ken-ichi Uchida, Jun'ichi Ieda, Yong-Chang Lau, Shunsuke Fukami, Koki Takanashi
Summary: This paper investigates the role of antisymmetric interlayer exchange coupling (AIEC) in the magnetization switching of a synthetic antiferromagnet and identifies key factors through experimental and theoretical analysis. The results demonstrate that perpendicular magnetization switching can be achieved solely by applying an in-plane magnetic field.
PHYSICAL REVIEW APPLIED
(2022)
Article
Physics, Applied
Tomas Scepka, Juraj Feilhauer, Jaroslav Tobik, Sergei Krylov, Tetiana Kalmykova, Vladimir Cambel, Michal Mruczkiewicz
Summary: We experimentally and numerically demonstrate the control of magnetization circulation in the closure domain state of thin permalloy squares. By applying an appropriate external magnetic field and interacting with a magnetic force microscopy (MFM) tip, we achieve control over the magnetization circulation. Numerical simulations confirm the validity of the proposed switching protocol for a wide range of MFM tips. Experimental results show that this method is robust against slight imperfections in the fabrication process and exhibits proper symmetry response under different experimental conditions.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Physics, Multidisciplinary
N. Jiang, Y. Nii, H. Arisawa, E. Saitoh, J. Ohe, Y. Onose
Summary: Chirality in a helimagnetic structure is determined by the direction of magnetic moment rotation, and this information persists even after transitioning to a high-temperature ferromagnetic phase. Study on the 2nd harmonic resistivity rho(2f) reveals insights into chirality characteristics under different magnetic states, with the chirality memory effect possibly originating from ferromagnetic domain walls.
PHYSICAL REVIEW LETTERS
(2021)
Article
Chemistry, Physical
Satyapal S. Rathore, Rashi Nathawat, Satish Vitta
Summary: The temperature dependence of structural and dielectric properties of polycrystalline Ba3NbFe3Si2O14 was studied, revealing significant variations in dielectric constant ε' and ac conductivity σ' with temperature and frequency. The conductivity behavior was found to be described by a double power law, similar to modified Jonscher's law, and attributed to hopping polarization and hopping between non-uniform potential wells. This model may provide insights into the conductivity mechanism of a wide range of complex materials.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Qingmei Wu, Zhangzhang Cui, Mo Zhu, Zhongyuan Jiang, Zhengping Fu, Yalin Lu
Summary: In this work, a controllable switch between antisymmetric and symmetric magnetoresistance (MR) is reported in a Fe3GeTe2 (FGT)/graphite/FGT trilayer with modified vertical geometry. The antisymmetric MR is found to result from the local nonequilibrium current through the trilayer, which can be affected by the spatial distribution, current direction, and magnetization configuration. The introduction of an exchange bias effect can modify the antisymmetric MR and enable stable multi-bit memory in the heterostructure, providing insights into improving storage density in other spin-valve structures.
Article
Chemistry, Inorganic & Nuclear
Mohammed-Amine Bouammali, Nicolas Suaud, Nathalie Guihery, Remi Maurice
Summary: The article discusses the origin and properties of the antisymmetric exchange (DMI) in specific complexes, emphasizes the importance of ab initio studies in explaining this interaction, and highlights the use of simplified structural models for more challenging calculations.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Mohammed-Amine Bouammali, Nicolas Suaud, Nathalie Guihery, Remi Maurice
Summary: This article investigates the mechanism of the antisymmetric exchange in copper complexes, confirming the applicability of the multispin model to trinuclear complexes and emphasizing the importance of correctly applying permutation relationships in ab initio calculations. The study also demonstrates that model parameters extracted from binuclear models can be successfully transferred to trinuclear complexes.
INORGANIC CHEMISTRY
(2022)
Article
Nanoscience & Nanotechnology
S. Laureti, A. Gerardino, F. D'Acapito, D. Peddis, G. Varvaro
Summary: Studying the interfacing effects of different magnetic phases in close contact has led to the discovery of novel physical properties and innovative technological applications of nanostructured magnetic materials. By controlling chemical and microstructural inhomogeneities, it is possible to finely tune the overall physical properties of materials.
Article
Materials Science, Multidisciplinary
Jun-Wen Xu, Grant A. Riley, Justin M. Shaw, Hans T. Nembach, Andrew D. Kent
Summary: Antisymmetric exchange interactions result in nonreciprocal spin-wave propagation, leading to time-dependent phase of confined spin waves in nanostructures. A Brillouin light scattering (BLS) study was conducted on Co/Pt nanowires with strong Dzyaloshinskii-Moriya interactions, revealing a dramatic reduction in frequency shift between BLS Stokes and anti-Stokes lines in narrow wires. This reduction is explained by a model considering the chiral nature of modes, which was confirmed by experimental results.
Article
Physics, Applied
V. D. Poimanov, V. V. Kruglyak
Summary: The chirality of magnetization precession at interfaces between ferromagnets affects the emission and scattering of spin waves, resulting in asymmetrical emission and strong suppression of wave transmission. These findings are crucial for the construction of spin-wave devices and interpretation of measurements in chiral magnonics.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Md Wazedur Rahman, Mari C. Manas-Torres, Seyedamin Firouzeh, Sara Illescas-Lopez, Juan Manuel Cuerva, Modesto T. Lopez-Lopez, Luis Alvarez de Cienfuegos, Sandipan Pramanik
Summary: Supramolecular short-peptide assemblies are important biomaterials used in biomedical applications. These materials can self-assemble into chiral hierarchical structures triggered by various stimuli. The resulting supramolecular chirality can modulate protein and cell interactions. Recently, research has focused on developing chiral materials with potential spintronic applications. By combining different chiral sources, such as homochiral peptides and glucono-delta-lactone, researchers have shown that the supramolecular chirality and spin signal can be modulated. This study opens up new possibilities for developing CISS-based spintronic devices and circuits.
Article
Materials Science, Multidisciplinary
Le Van Lich, Dang Thi Hong Hue, Do Thi Huong Giang, Nguyen Huu Duc, Takahiro Shimada, Takayuki Kitamura, Van-Hai Dinh
Summary: Patterning three-dimensional chiral nanostructures is a new approach to control complex magnetization textures in magnetic systems, leading to new physics and functionalities. However, understanding the geometry-induced effects in magnetic nanostructures remains challenging due to the complex interactions among magnetic interactions, confined geometries, and multi-fields. In this study, we use micromagnetic simulations to investigate the magnetization textures in Ni79Fe21 gyroid nanostructures with different solid volume fractions. Unusual magnetic field textures with the coexistence of left- and right-hand helices are formed in the gyroid nanostructures in the absence of an external field. The ice rule governs the magnetic field textures in gyroids with small solid volume fractions, while a frustration of magnetic textures is observed in gyroids with large solid volume fractions.
Article
Materials Science, Multidisciplinary
Hannah Lange, Sergiy Mankovsky, Svitlana Polesya, Markus Weissenhofer, Ulrich Nowak, Hubert Ebert
Summary: Recently, there has been a lot of attention on the interplay between spin and lattice degrees of freedom due to its importance in various phenomena and applications. This work provides a systematic analysis of spin-lattice interactions in different magnetic materials and focuses on the role of lattice symmetries and dimensions, magnetic order, and the relevance of spin-lattice interactions for angular momentum transfer and magnetic frustration. The authors use a recently developed scheme and an embedded cluster approach to efficiently calculate spin-lattice interaction tensors and benchmark the performance of the scheme.
Article
Quantum Science & Technology
Anton Potocnik, Steven Brebels, Jeroen Verjauw, Rohith Acharya, Alexander Grill, Danny Wan, Massimo Mongillo, Ruoyu Li, Tsvetan Ivanov, Steven Van Winckel, Fahd A. Mohiyaddin, Bogdan Govoreanu, Jan Craninckx, Iuliana P. Radu
Summary: Quantum computers based on solid state qubits have seen rapid development, but the current technology faces scalability issues. This research introduces a cryo-CMOS multiplexer operating at very low temperatures, which shows excellent microwave properties and increases device characterization efficiency. This work lays the foundation for large-scale microwave quantum device characterization and addresses the wiring problem in future quantum computers.
QUANTUM SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Rania Harrabi, Thomas Halbritter, Fabien Aussenac, Ons Dakhlaoui, Johan van Tol, Krishna K. Damodaran, Daniel Lee, Subhradip Paul, Sabine Hediger, Frederic Mentink-Vigier, Snorri Th Sigurdsson, Gael De Paepe
Summary: Efficiently polarizing proton-dense molecular solids through dynamic nuclear polarization (DNP) solid-state NMR has been a great challenge. In this study, we introduce a new polarizing agent, cAsymPol-POK, which shows outstanding performance in polarizing biomolecular assemblies and organic microcrystals at high magnetic fields and fast magic angle spinning frequencies. Simulation and experimental results demonstrate the compatibility of cAsymPol-POK with challenging biomolecular applications and its ability to rapidly acquire crucial structural data of pharmaceutical drugs at natural isotopic abundance.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
T. Arh, B. Sana, M. Pregelj, P. Khuntia, Z. Jaglicic, M. D. Le, P. K. Biswas, P. Manuel, L. Mangin-Thro, A. Ozarowski, A. Zorko
Summary: Evidence for a quantum spin liquid phase in NdTa7O19 is reported, with effective spin-1/2 degrees of freedom and Ising-like nearest-neighbour correlations stabilized by strong spin-orbit coupling, allowing spin excitations to persist at low temperatures.
Article
Biochemical Research Methods
Daniel Jardon-Alvarez, Tahel Malka, Johan van Tol, Yishay Feldman, Raanan Carmieli, Michal Leskes
Summary: This study maps the fluctuations of the magnetic moment of unpaired electron spins by analyzing the ratio between longitudinal and transverse nuclear relaxation times. This analysis helps explain the evolution of NMR lineshapes and DNP enhancements as a function of the concentration of paramagnetic species and temperature.
JOURNAL OF MAGNETIC RESONANCE
(2022)
Article
Multidisciplinary Sciences
Matej Pregelj, Zurab Guguchia, Marie-Cecile de Weerd, Pascal Boulet, Stanislav Vrtnik, Janez Dolinsek
Summary: We report on the dynamics of a magnetic-field-driven antiferromagnetic-to-paramagnetic quantum phase transition in monocrystalline Ce3Al using transverse-field muon spin rotation (TF-mu SR) experiments down to a low temperature of approximately 80 mK. The research reveals that the fluctuations have the largest amplitude at the quantum critical point, as demonstrated by the maximum muon transverse relaxation rate at the critical field. The quantum fluctuations observed exhibit temperature independence in the average local magnetic field component and muon transverse relaxation rate within the investigated temperature range.
SCIENTIFIC REPORTS
(2022)
Article
Quantum Science & Technology
J. Verjauw, R. Acharya, J. Van Damme, Ts Ivanov, D. Perez Lozano, F. A. Mohiyaddin, D. Wan, J. Jussot, A. M. Vadiraj, M. Mongillo, M. Heyns, I Radu, B. Govoreanu, A. Potocnik
Summary: As the superconducting qubit platform advances, limitations due to lack of process control become apparent. Different processing methods are required to benefit from advanced process control in industry-scale CMOS fabrication facilities. This study demonstrates a fully CMOS compatible qubit fabrication method, showing results on par with the state-of-the-art, with long coherence and relaxation times in overlap Josephson junction devices.
NPJ QUANTUM INFORMATION
(2022)
Article
Physics, Atomic, Molecular & Chemical
Claudio Bonizzoni, Maksut Maksutoglu, Alberto Ghirri, Johan van Tol, Bulat Rameev, Marco Affronte
Summary: We report the development and test of planar microwave Inverse Anapole Resonators (IARs) made of superconducting Yttrium Barium Copper Oxide (YBCO) for electron spin resonance spectroscopy on small samples. The results show that these resonators have higher spin sensitivity compared to typical linear coplanar resonators in both continuous-wave and pulsed-wave mode.
APPLIED MAGNETIC RESONANCE
(2023)
Article
Biochemical Research Methods
Murari Soundararajan, Thierry Dubroca, Johan van Tol, Stephen Hill, Lucio Frydman, Sungsool Wi
Summary: This study presents 1H-detected NMR experiments on relatively large liquid volumes at high fields using ODNP enhancements. By utilizing scalar couplings between 13C and 1H, the polarization transfer between nuclei was achieved, resulting in higher sensitivity at higher frequencies.
JOURNAL OF MAGNETIC RESONANCE
(2022)
Article
Chemistry, Multidisciplinary
Christian D. Buch, Krishnendu Kundu, Jonathan J. Marbey, Johan van Tol, Hogni Weihe, Stephen Hill, Stergios Piligkos
Summary: In this study, multifrequency electron paramagnetic resonance spectroscopy was used to investigate the behavior of Gd(III) ions in Gd0.004Y0.996(trensal) single crystals, and the Hamiltonian parameters of the ground state and the phase memory time, Tm, characterizing its coherent spin dynamics were determined.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Frederic A. Perras, Yoh Matsuki, Scott A. Southern, Thierry Dubroca, Dragos F. Flesariu, Johan Van Tol, Christos P. Constantinides, Panayiotis A. Koutentis
Summary: The Overhauser effect in DNP of non-conducting solids has attracted attention due to its potential for efficient high-field DNP and interest in the principles behind it. In this study, the authors investigate the mechanism for methyl-driven Overhauser DNP in detail and predict its temperature dependence using density functional theory and spin dynamics simulations. Comparisons with experimental results reveal that cross-relaxation originates from both libration and rotation at temperatures above 60 K, with libration dominating at lower temperatures. These findings suggest that methyl-driven Overhauser DNP can increase in efficiency down to 0 K.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Brijith Thomas, Daniel Jardon-Alvarez, Raanan Carmieli, Johan van Tol, Michal Leskes
Summary: In DNP-NMR experiments, the polarization of unpaired electrons is transferred to nuclei, increasing the sensitivity of NMR signal. While this method is efficient in crystalline inorganic oxides, it is less effective in oxide glasses. The difference in efficiency can be attributed to shorter relaxation times and dielectric properties in glasses. These findings provide guidance in identifying suitable materials for the DNP approach.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Ziga Gosar, Tina Arh, Kevin Jaksetic, Andrej Zorko, Wenhao Liu, Hanlin Wu, Chennan Wang, Hubertus Luetkens, Bing Lv, Denis Arcon
Summary: Quasi-one-dimensional electron systems exhibit instability towards long-range ordered phases at low temperatures. In this study, muon spin rotation and relaxation (& mu;SR) were used to investigate the superconducting state in Rb2Mo3As3, which has one of the highest critical temperatures Tc = 10.4 K among quasi-one-dimensional superconductors. The results show stronger damping below Tc due to the formation of a vortex lattice. Comparison of different models suggests that the s-wave scenario provides the best fit, but with an anomalously small superconducting gap ⠁0/Tc ratio of 2 ⠁0/kBTc = 2.74(1). However, the nodal p-wave or d-wave scenarios cannot be ruled out based on slightly worse fits, yielding more realistic ratios of 2 ⠁0/kBTc = 3.50(2) and 2 ⠁0/kBTc = 4.08(1), respectively.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Materials Science, Multidisciplinary
Y. Alexanian, J. Robert, V. Simonet, B. Langerome, J. -B. Brubach, P. Roy, C. Decorse, E. Lhotel, E. Constable, R. Ballou, S. De Brion
Summary: A significant link between quadrupolar order and magnetoelastic coupling has been found in the spin liquid state of pyrochlore Tb2+xTi2-xO7+y. The vibronic process, which involves quadrupolar degrees of freedom, competes with long-range ordered quadrupolar ice.
Article
Materials Science, Multidisciplinary
Chanhyeon Lee, Suheon Lee, Heung-Sik Kim, Shunichiro Kittaka, Yoshimitsu Kohama, Toshiro Sakakibara, Ki Hoon Lee, J. van Tol, Denis I. Gorbunov, Seung-Hwan Do, Sungwon Yoon, Adam Berlie, Kwang-Yong Choi
Summary: We investigate the disorder-driven behavior of the 3D frustrated cubic lattice Lu3Sb3Mn2O14 (s = 5/2) using thermodynamic, electron spin resonance (ESR), and muon spin-relaxation (mu SR) measurements, as well as density functional theory (DFT) and classical Monte Carlo calculations. The DFT-based classical Monte Carlo calculations predict a magnetic ordering transition in Lu3Sb3Mn2O14, but our specific heat measurements show a weak magnetic anomaly at 0.5 K, and mu SR detects no long-range magnetic order or spin freezing down to 0.3 K. For temperatures above 2 K, our data suggest the formation of 3D random singlets. The appearance of multiple ESR lines below 80 K supports the existence of inhomogeneous magnetism. Our results expand the understanding of random-singlet physics to 3D frustrated classical magnets with a large spin number s = 5/2.
Article
Materials Science, Multidisciplinary
M. Pregelj, A. Zorko, D. Arcon, M. Klanjsek, N. Jansa, P. Jeglic, O. Zaharko, S. Kraemer, M. Horvatic, A. Prokofiev
Summary: In this study, a comprehensive investigation of β-TeVO4 using nuclear magnetic resonance technique reveals the dynamic nature of spin-density-wave (SDW) and spin-stripe phases in this material. In the high-field phase, the arrangement of magnetic moments is similar to that of the SDW phase, possibly stabilized by magnetic anisotropy.
