Article
Nanoscience & Nanotechnology
Vimal Deepchand, Vasileios Tzitzios, George C. Hadjipanayis
Summary: This study demonstrates that the use of elemental iodine as a halide intermediary facilitates the formation of FePt3 nanoparticles with the L1(2) structure, compared to the mostly disordered fcc FePt3 structure when iodine is not used. Annealing of the nanoparticles leads to an increased particle size and a transformation to the ordered L1(2) FePt3 phase.
Article
Physics, Multidisciplinary
Natascha Hedrich, Kai Wagner, Oleksandr V. Pylypovskyi, Brendan J. Shields, Tobias Kosub, Denis D. Sheka, Denys Makarov, Patrick Maletinsky
Summary: The study demonstrated manipulation and interaction of antiferromagnetic domain walls using isolated 180 degree domain walls in a single crystal of Cr2O3, proposing a memory architecture based on topographically defined antiferromagnetic domain walls. These results advance the understanding of domain wall mechanics in antiferromagnets.
Article
Multidisciplinary Sciences
Sonka Reimers, Dominik Kriegner, Olena Gomonay, Dina Carbone, Filip Krizek, Vit Novak, Richard P. Campion, Francesco Maccherozzi, Alexander Bjorling, Oliver J. Amin, Luke X. Barton, Stuart F. Poole, Khalid A. Omari, Jan Michalicka, Ondrej Man, Jairo Sinova, Tomas Jungwirth, Peter Wadley, Sarnjeet S. Dhesi, Kevin W. Edmonds
Summary: This study reveals that the antiferromagnetic (AF) domain structure in CuMnAs thin films is dominated by nanoscale structural twin defects, which play a crucial role in determining the location and orientation of AF domain walls. The results provide insights into the interplay of crystalline defects, strain, and magnetic ordering in AF materials, offering a route to optimize device performance.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Zhenhua Zhang, Yong Liu, Youyuan Yuan, Rui Xiong, Zhihong Lu
Summary: Stoichiometric FePt3 thin film with modulated chemical order is studied in terms of its interface, magnetic depth profile, and magnetic properties. The film shows a high exchange bias field, which increases rapidly at low temperatures, indicating the possible induction of Q2 antiferromagnetic order.
Article
Physics, Multidisciplinary
Hanchen Wang, Rundong Yuan, Yongjian Zhou, Yuelin Zhang, Jilei Chen, Song Liu, Hao Jia, Dapeng Yu, Jean-Philippe Ansermet, Cheng Song, Haiming Yu
Summary: We report on the coherent propagation of antiferromagnetic (AFM) spin waves over a long distance at room temperature in a canted AFM alpha-Fe2O3. High group velocities of up to 22.5 km/s were observed using all-electrical spin wave spectroscopy. The analytical derivation of the AFM spin-wave dispersion in the presence of Dzyaloshinskii-Moriya interaction (DMI) explained our experimental results and provided insights into AFM spin dynamics.
PHYSICAL REVIEW LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Junjie Xu, Wei Li, Biao Zhang, Liang Zha, Wei Hao, Shixin Hu, Jinbo Yang, ShuZhou Li, Song Gao, Yanglong Hou
Summary: The study has successfully prepared free-standing 2D nvdWs hexagonal FeSe with a thickness of only 2.9 nm, demonstrating unique magnetic and semiconducting properties. Temperature variation leads to magnetic transitions, showing great potential for applications.
Article
Chemistry, Multidisciplinary
Yuelei Zhao, Sheng Yang, Kai Wu, Shuang Li, Yang Gao, Hongyuan Hao, Xichao Zhang, Shouguo Wang, Qingfang Liu, Senfu Zhang, Zhiqin Chu, Johan Akerman, Yan Zhou
Summary: Synthetic antiferromagnetic (SAF) skyrmions, with high mobility and no skyrmion Hall effect, are emerging as novel information carriers. However, distinguishing SAF skyrmions from ferromagnetic ones using imaging techniques remains challenging. In this study, a universal identification method is proposed, and the motion of SAF skyrmions with suppressed skyrmion Hall effect is investigated. These findings will accelerate the realization of practical applications based on SAF skyrmions.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Physics, Applied
Longjie Yu, Shutaro Karube, Min Liu, Masakiyo Tsunoda, Mikihiko Oogane, Yasuo Ando
Summary: Non-collinear antiferromagnets possess topological spin structure, allowing for the manipulation of charge-spin conversion. In this study, we investigate the unconventional spin-orbit torque of L1(2)-ordered Mn3Pt with a triangular spin structure.
APPLIED PHYSICS EXPRESS
(2022)
Article
Physics, Applied
H. Meer, O. Gomonay, A. Wittmann, M. Klaeui
Summary: Antiferromagnetic transition metal oxides are extensively studied in the field of spin-based electronics, commonly used as passive elements in exchange bias-based memory devices. Recent observations of long-distance spin transport, current-induced switching, and THz emission have renewed interest in these insulating materials, which are now considered attractive candidates for active elements in future spintronic devices. This article discusses promising materials systems and recent advances in reading and writing antiferromagnetic ordering, providing an overview of current research and potential future directions in the field of antiferromagnetic insulatronics.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
N. B. Devlin, T. Ferrus, C. H. W. Barnes
Summary: This study explores the emergence of spin-polarized flat bands at head-to-head domain walls in topological insulator heterostructures. By tuning the width of the domain wall, the functional form of bound states can be controlled. The number of layers in a multilayer sample affects the electronic dispersion, with odd-layer samples exhibiting particle-hole symmetry and linearly dispersing topologically nontrivial states around E=0, while even-layer samples lack such symmetry and result in a gapped system with spin-polarized flat bands.
Article
Multidisciplinary Sciences
Zbigniew Bukowski, Damian Rybicki, Michal Babij, Janusz Przewoznik, Lukasz Gondek, Jan Zukrowski, Czeslaw Kapusta
Summary: Compounds containing Eu exhibit unique physical properties due to the interplay of electronic and magnetic properties. In this study, the growth of EuZn2As2 single crystals and their structural, electronic and magnetic properties were investigated. Experimental techniques including X-ray diffraction, electron microscopy, magnetic susceptibility, magnetization, heat capacity and Mossbauer spectroscopy were employed. The results show that Eu has a valence state of 2+ and forms a canted antiferromagnetic structure tilted from the basal plane below 19.2 K.
SCIENTIFIC REPORTS
(2022)
Article
Multidisciplinary Sciences
Aurore Finco, Angela Haykal, Rana Tanos, Florentin Fabre, Saddem Chouaieb, Waseem Akhtar, Isabelle Robert-Philip, William Legrand, Fernando Ajejas, Karim Bouzehouane, Nicolas Reyren, Thibaut Devolder, Jean-Paul Adam, Joo-Von Kim, Vincent Cros, Vincent Jacques
Summary: By utilizing a quantum magnetometer based on a single NV center, the researchers have successfully demonstrated the all-optical imaging of antiferromagnetic spin textures. Through variations in the NV spin relaxation rate, they were able to image AFM domain walls and skyrmions.
NATURE COMMUNICATIONS
(2021)
Article
Physics, Applied
Yuta Kobayashi, Motoi Kimata, Daisuke Kan, Tetsuya Ikebuchi, Yoichi Shiota, Hiroshi Kohno, Yuichi Shimakawa, Teruo Ono, Takahiro Moriyama
Summary: This study investigates the relationship between anomalous Hall conductivity and the chemical order parameter in chiral antiferromagnetic L1(2)-Mn3Ir (111)-oriented films. The results show that the anomalous Hall conductivity is more pronounced in (111)-oriented films compared to (001)-oriented films, consistent with the theoretical prediction. It is also found that the anomalous Hall conductivity strongly depends on the longitudinal conductivity, suggesting a possible extrinsic contribution.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
I. A. Golovchanskiy, N. N. Abramov, V. A. Vlasenko, K. Pervakov, I. Shchetinin, P. S. Dzhumaev, O. Emelyanova, D. S. Baranov, D. S. Kalashnikov, K. B. Polevoy, V. M. Pudalov, V. S. Stolyarov
Summary: In this paper, we present the results of magnetic resonance spectroscopy on EuFe2As2 single crystals. We observe magnetic resonance responses that can be attributed to antiferromagnetic resonances of the Eu sublattice with orthorhombic crystal structure and different orientations of twin domains relative to the external field. We confirm the validity of the recently proposed spin Hamiltonian with anisotropic Eu-Eu exchange interaction and biquadratic Eu-Fe exchange interaction.
Article
Multidisciplinary Sciences
M. J. Pearce, K. Goetze, A. Szabo, T. S. Sikkenk, M. R. Lees, A. T. Boothroyd, D. Prabhakaran, C. Castelnovo, P. A. Goddard
Summary: Magnetically frustrated systems exhibit complex behavior such as emergent symmetries, topological properties, and exotic excitations, with the reliable experimental indicator of the density of magnetic monopoles remaining elusive despite extensive research. This study demonstrates a strong coupling between monopoles on the holmium sublattice and antiferromagnetically ordered iridium ions, paving the way for a quantitative experimental measure of monopole density. Furthermore, the research showcases the ability to control antiferromagnetic domain walls using a uniform external magnetic field, a crucial step towards enhancing future spintronic device design.
NATURE COMMUNICATIONS
(2022)
