Article
Nanoscience & Nanotechnology
J. Askey, M. Hunt, W. Langbein, S. Ladak
Summary: Cylindrical magnetic nanowires have been extensively studied for their unique topology and dynamic properties. This study numerically investigates the domain wall magnetization textures of nickel nanowires and discovers a new domain wall type that combines aspects of both Bloch point walls and asymmetric transverse walls.
Article
Physics, Applied
K. S. Antipin, T. T. Gareev, N. Myasnikov, E. P. Nikolaeva, A. P. Pyatakov
Summary: The paper demonstrates the emergence of magnetic domains in an iron garnet film at room temperature under the influence of an external electric field, with the nucleation of magnetic domains occurring with 90 degrees domain walls at both positively and negatively biased tips. The experimental and theoretical studies reveal the mechanism of electric field generation of the 90 degrees magnetic domain and its dependence on the domain wall's chirality.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Ananya Renuka Balakrishna, Richard D. James
Summary: This study develops a theoretical and computational tool to investigate the interplay between material constants that govern coercivity in bulk magnetic alloys. The interactions between local instabilities and material constants, such as anisotropy and magnetostriction constants, are identified as key factors in governing magnetic coercivity. The study provides a theoretical framework to potentially discover novel magnetic materials with low coercivity.
Article
Chemistry, Multidisciplinary
Zhenghua Li, Bin Dong, Yangyang He, Aiying Chen, Xiang Li, Jing-Hua Tian, Chenglin Yan
Summary: Researchers have successfully realized a higher-order vortex network through a designed nanostructure and demonstrated its potential as a waveguide for spin waves. The experiment showed that spin waves can propagate into the network through nanochannels formed by Bloch-Neel-type domain walls, with a propagation decay length of several micrometers, paving the way for the development of low-energy, reprogrammable, and miniaturized magnonic devices.
Article
Computer Science, Information Systems
Fabrizio Riente, Giovanna Turvani, Marco Vacca, Mariagrazia Graziano
Summary: This study introduces a new domain wall-based racetrack concept that can operate as both a memory and a computing device, with reconfigurable logic gates implemented using stray fields from nearby cells. The racetrack array is shown to operate in parallel in every cell, with the potential for logic gates like NAND/NOR to be independently implemented in each computing cell.
IEEE TRANSACTIONS ON EMERGING TOPICS IN COMPUTING
(2022)
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, Multidisciplinary
Cristina Balan, Johannes W. van de Jagt, Aymen Fassatoui, Jose Pena Garcia, Vincent Jeudy, Andre Thiaville, Marlio Bonfim, Jan Vogel, Laurent Ranno, Dafine Ravelosona, Stefania Pizzini
Summary: This research illustrates the effect of He+ irradiation on the magnetization reversal and domain wall dynamics of Pt/Co/AlOx trilayers. It is found that irradiation significantly decreases the depinning field of domain walls, allowing them to reach higher velocities at lower magnetic fields. It is also observed that larger He+ fluences lead to the formation of stable magnetic skyrmions with smaller sizes, in agreement with theoretical models for ultrathin films with labyrinthine domains.
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
Physics, Multidisciplinary
Kevin J. A. Franke, Colin Ophus, Andreas K. Schmid, Christopher H. Marrows
Summary: Through micromagnetic simulations and analytical modeling, it has been found that Neel walls can be formed even in the absence of a Dzyaloshinskii-Moriya interaction, but with uniaxial in-plane magnetic anisotropy. The ability to switch between Bloch and Neel walls can be achieved via modulation of both in-plane and perpendicular magnetic anisotropy, opening up possibilities for electric field control of domain wall type with small applied voltages.
PHYSICAL REVIEW LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Mangui Han
Summary: Periodically ordered Fe nanowires embedded in anodic alumina nanoporous templates were successfully prepared by electrochemical deposition. Experimental and micromagnetics simulations revealed strong magnetic dipolar interactions among the nanowires, as well as multiple natural resonances in the nanowires array, believed to be caused by the inhomogeneous localized magnetic anisotropic field. Mossbauer spectra further verified the inhomogeneous alignment of magnetic moments.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Wenting Huang, Christophe Gatel, Zi-An Li, Gunther Richter
Summary: Fe and Co nano-whiskers and Co platelets were synthesized without using any template or catalyst via physical vapor deposition. The synthesized whiskers exhibited single crystal structures and magnetic single domain structures, while both FCC and HCP crystal structures were found in the Co whiskers. Vortex state was observed in a high symmetry platelet.
MATERIALS & DESIGN
(2021)
Article
Materials Science, Multidisciplinary
L. Fecova, K. Richter, R. Varga
Summary: The study explores the strong interaction between ferrromagnetic domain wall with transverse configuration and external magnetic fields, as well as the effect of transverse magnetic fields on domain wall dynamics. Experimental results demonstrate that a specific direction of transverse magnetic field has a blocking effect on domain wall propagation.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Richard W. Dawidek, Thomas J. Hayward, Ian T. Vidamour, Thomas J. Broomhall, Guru Venkat, Mohanad Al Mamoori, Aidan Mullen, Stephan J. Kyle, Paul W. Fry, Nina-Juliane Steinke, Joshaniel F. K. Cooper, Francesco Maccherozzi, Sarnjeet S. Dhesi, Lucia Aballe, Michael Foerster, Jordi Prat, Eleni Vasilaki, Matthew O. A. Ellis, Dan A. Allwood
Summary: Emergent behaviors result from interactions between simple system elements that produce properties not exhibited by individual elements. This article discusses tunable emergent behaviors observed in arrays of interconnected magnetic ring-shaped nanowires under a rotating magnetic field. The arrays exhibit dynamic, field-dependent equilibrium domain wall populations despite diverse local magnetic configurations, making them a promising candidate for hardware-based reservoir computing.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Guidobeth Saez, Pablo Diaz, Nicolas Vidal-Silva, Juan Escrig, Eugenio E. Vogel
Summary: This paper studies the robustness of Bloch Points (BPs) in long nanowires used for information storage, depending on geometrical parameters and external magnetic fields.
RESULTS IN PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Jin Lan, Weichao Yu, Jiang Xiao
Summary: Spin wave, a fundamental angular momentum carrier in magnetic systems, propagates across chiral domain walls following simple geometric trajectories similar to geometric optics. Geometric behaviors are qualitatively different in normally magnetized films and tangentially magnetized films. Scattering phenomena become polarization dependent in antiferromagnets, indicating the emergence of spin wave birefringence inside antiferromagnetic domain walls.