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Skyrmions in magnetic materials are topologically protected states in which magnetization rotates gradually in the plane perpendicular to the thin film in a way which results in a non-zero and integral winding number due to the specific spatial arrangement of the magnetic spins. The topological protection offers them extra stability which is typically absent in trivial 180o domain walls. Skyrmions also boast of being able to move with very less current in a constrained system, say nanotracks, making them an excellent candidate for next generation ultralow power robust magnetic memories. Moreover, with the 2016 Nobel Prize given for the research in Topological Phases of Matter, the research on magnetic skyrmions and their applications has grown exponentially. Since then, the exciting interplay between mathematics and physics which gives rise to these beautiful topological states has been among the top interests of the research community. With people predicting the applications of such topological states in quantum computers, superconductors and other electronics, the potential of skyrmion based devices is practically limitless. By overcoming various hurdles in technological implementations of these devices using cutting edge research, the commercialization of skyrmion based devices may come out to be the next major leap in technology after transistors. In our group, we focus on study of skyrmion dynamics, and stability of skyrmions using both experiment and simulations.
Related publications:
1. Energy-efficient ultrafast nucleation of single and multiple antiferromagnetic skyrmions using in-plane spin-polarized current, Kacho Imtiyaz Ali Khan, Naveen Sisodia, and P. K. Muduli, Scientific Report 21, 91591 (2021).
Naveen Sisodia, Pranaba Kishor Muduli, Nikos Papanicolaou, Stavros Komineas, Phys. Rev. B 103, 024431 (2021)
3. Thermal Decay of a Single Néel Skyrmion via Helicity Slip in a Nanodisk
Naveen Sisodia and P. K. Muduli, Phys. Status Solidi RRL 1900525 (2020)
4. Chiral skyrmion auto-oscillations in a ferromagnet under spin transfer torque
Naveen Sisodia, Stavros Komineas, and P. K. Muduli, Phys. Rev. B 99, 184441 (2019).
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