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Unidirectional motion of magnetic domain walls is the key concept underlying next-generation domain-wall-mediated memory and logic devices. Such motion has been achieved either by injecting large electric currents into nanowires or by…

We construct a new 2-parameter family of static topological solitons in 5D minimal supergravity which are endowed with magnetic charge and mass. The solitons are asymptotically ${\mathbb R}^4\times S^1$, where the radius of the $S^1$ has a…

High Energy Physics - Theory · Physics 2015-05-28 Sean Stotyn , Robert B. Mann

The nucleation and evolution of bubbles are investigated in the model of an $O(3)$-symmetric scalar field coupled to gravity in the high temperature limit. It is shown that, in addition to the well-known bubble of which the inside region is…

General Relativity and Quantum Cosmology · Physics 2009-10-28 Yoonbai Kim , Kei-ichi Maeda , Nobuyuki Sakai

High spatial resolution X-ray photo-emission electron microscopy technique has been used to study the influence of the dipolar coupling taking place between the NiFe and the Co ferromagnetic electrodes of micron sized, elliptical shaped…

Weak first-order phase transitions proceed with percolation of new phase. The kinematics of this process is clarified from the point of view of subcritical bubbles. We examine the effect of small subcritical bubbles around a large domain of…

High Energy Physics - Theory · Physics 2009-10-30 Tetsuya Shiromizu , Masahiro Morikawa

The successful realization of skyrmion-based spintronic devices depends on the easy manipulation of underlying magnetic interactions in the skyrmion-hosting materials. Although the mechanism of skyrmion formation in non-centrosymmetric…

Materials Science · Physics 2022-07-28 Dola Chakrabartty , Sk Jamaluddin , Subhendu K. Manna , Ajaya K. Nayak

We theoretically study equilibrium and dynamic properties of nanosized magnetic skyrmions in thin magnetic films with broken inversion symmetry, where electric field couples to magnetization via spin-orbit coupling. Based on a…

Mesoscale and Nanoscale Physics · Physics 2015-10-21 Pramey Upadhyaya , Guoqiang Yu , Pedram Khalili Amiri , Kang L. Wang

Magnetic skyrmions are nontrivial spin textures which resist external perturbations, being promising candidates for the next generation recording devices. Nevertheless, a major challenge in realizing skyrmion-based devices is the…

We study the dynamics of skyrmions in chiral magnets in the presence of a spin polarized current. The motion of skyrmions in the ferromagnetic background excites spin waves and contributes to additional damping. At a large current, the spin…

Strongly Correlated Electrons · Physics 2013-05-15 Shi-Zeng Lin , Charles Reichhardt , Cristian D. Batista , Avadh Saxena

We study the dynamics of axions at first-order phase transitions in non-Abelian gauge theories. When the duration of the phase transition is short compared to the timescale of the axion oscillations, the axion dynamics is similar to the…

High Energy Physics - Phenomenology · Physics 2024-03-19 Junseok Lee , Kai Murai , Fuminobu Takahashi , Wen Yin

We clarify the conditions for the emergence of multiple-${\bf Q}$ structures out of lattice and easy-axis spin anisotropy in frustrated magnets. By considering magnets whose exchange interaction has multiple global minima in momentum space,…

Mesoscale and Nanoscale Physics · Physics 2016-05-16 Satoru Hayami , Shi-Zeng Lin , Cristian D. Batista

The creation and manipulation of magnetic skyrmions in magnetic bilayer heterostructures via spin-orbit torque have been intensively studied in spintronics because of their potential application as information carriers in next-generation…

Mesoscale and Nanoscale Physics · Physics 2025-05-09 Yuto Uwabo , Masahito Mochizuki

We investigate the scattering of fermions off domain walls at the electroweak phase transition in presence of a magnetic field. We consider both the bubble wall and the kink domain wall. We derive and solve the Dirac equation for fermions…

Astrophysics · Physics 2011-07-19 P. Cea , G. L. Fogli , L. Tedesco

Topological superconductors are associated with the appearance of Majorana bound states, with promising applications in topologically protected quantum computing. In this Letter, we study a system where a skyrmion crystal is interfaced with…

Superconductivity · Physics 2023-04-14 Kristian Mæland , Asle Sudbø

We have performed an experimental and modeling-based study of the spin-orbit torque-induced growth of magnetic stripe domains in heavy metal/ferromagnet thin-film heterostructures that possess chiral N\'eel-type domain walls due to an…

Mesoscale and Nanoscale Physics · Physics 2023-05-04 Jeffrey A. Brock , Daan Swinkels , Bert Koopmans , Eric E. Fullerton

In the present research, we demonstrate the usage of plasmonic effects in thin film structures to control magnetic topological textures, specifically skyrmions and skyrmioniums. We investigate numerically the generation and alteration of…

Applied Physics · Physics 2024-03-13 W. Al Saidi , R. Sbiaa , Y. Dusch , N. Tiercelin

Magnetic skyrmion motion induced by an electric current has drawn much interest because of its application potential in next-generation magnetic memory devices. Recently, unidirectional skyrmion motion driven by an oscillating magnetic…

We consider the formation of a ring-like magnetic field in collisions of bubbles of broken phase in an abelian Higgs model. Particular attention is paid on multiple collisions. The small collision velocity limit, appropriate to the…

High Energy Physics - Phenomenology · Physics 2009-12-30 Jarkko Ahonen , Kari Enqvist

We numerically demonstrate an ultrafast method to create $\textit{single}$ skyrmions in a $\textit{collinear}$ ferromagnetic sample by applying a picosecond (effective) magnetic field pulse in the presence of Dzyaloshinskii-Moriya…

Mesoscale and Nanoscale Physics · Physics 2017-12-01 Vegard Flovik , Alireza Qaiumzadeh , Ashis K. Nandy , Changhoon Heo , Theo Rasing

When a horizontal resistive wire is heated up to the boiling point in a subcooled liquid bath, some vapor bubbles nucleate on its surface. Traditional nucleate boiling theory predicts that bubbles generated from active nucleate sites, grow…

Fluid Dynamics · Physics 2017-08-02 Alexis Duchesne , Hervé Caps