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Order parameter symmetry in superconducting 2H-TaSeS.
J Phys Condens Matter
December 2024
School of Physical Sciences, Jawaharlal Nehru University, New Delhi 110067, India.
Superconductors based on transition metal dichalcogenides are of substantial current relevance towards the material realization of topological superconductivity. Here, we report a detailed study on the synthesis and characterization of single crystals of 2H-TaSeS. A superconducting transition is confirmed at4.
View Article and Find Full Text PDFPossible structures of skyrmion states in chiral ferromagnetic films with spatially modulated uniaxial anisotropy.
J Phys Condens Matter
November 2024
Institute of Physics and Technology, Ufa University of Science and Technology, Ufa 450076, Russia.
In this paper, the stabilization conditions, structure, and properties of possible vortex-like inhomogeneities, including k-skyrmions= 0, 1, 2, 3, 4, in a uniaxial multilayer disk with a columnar defect in the center are investigated based on micromagnetic modeling. Their stability diagrams depending on the Dzyaloshinskii-Moriya interaction, the magnitude of magnetic anisotropy and the defect parameters are determined. New types of vortex-like inhomogeneities that can arise in such samples are found.
View Article and Find Full Text PDFVortex Domain Wall Thermal Pinning and Depinning in a Constricted Magnetic Nanowire for Storage Memory Nanodevices.
Nanomaterials (Basel)
September 2024
Department of Basic and Applied Sciences, A'Sharqiyah University, P.O. Box 42, Ibra 400, Oman.
In this study, we investigate the thermal pinning and depinning behaviors of vortex domain walls (VDWs) in constricted magnetic nanowires, with a focus on potential applications in storage memory nanodevices. Using micromagnetic simulations and spin transfer torque, we examine the impacts of device temperature on VDW transformation into a transverse domain wall (TDW), mobility, and thermal strength pinning at the constricted area. We explore how thermal fluctuations influence the stability and mobility of domain walls within stepped nanowires.
View Article and Find Full Text PDFDirect visualization of domain wall pinning in sub-100 nm 3D magnetic nanowires with cross-sectional curvature.
Nanoscale
October 2024
School of Physics and Astronomy, Cardiff University, Cardiff, CF24 3AA, UK.
The study of 3D magnetic nanostructures has uncovered rich phenomena including the stabilization of topological spin textures using nanoscale curvature, controlled spin-wave emission, and novel ground states enabled by collective frustrated interactions. From a technological perspective, 3D nanostructures offer routes to ultrahigh density data storage, massive interconnectivity within neuromorphic devices, as well as mechanical induction of stem cell differentiation. However, the fabrication of 3D nanomagnetic systems with feature sizes down to 10 nm poses a significant challenge.
View Article and Find Full Text PDFAnti-matching effect in a two dimensional driven vortex lattice in the presence of periodic pinning.
J Phys Condens Matter
September 2024
Department of Physics, BITS-Pilani, K K Birla Goa Campus, Zuarinagar Goa-403726, India.
The dynamics of a driven superconducting vortex lattice in a two-dimensional (2) periodic potential of square symmetry is studied using Brownian dynamics simulations. The range and strength of the vortex-substrate interaction are taken to be of the same order as that of the vortex-vortex interaction. The matching effect in a driven vortex lattice in the presence of a periodic array of pinning centers refers to the enhanced resistance to the vortex lattice motion when the ratio of the number of vortices to the number of pinning centers (called the filling fraction) takes simple fractional values.
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