Qualification of Ni laser ablation products in superfluid helium

Dvoretskaya E.V., Potapov M.V., Piskorsky V.P., Kolmakov A.O., Morgunov R.B.
UDC
631.437.8
DOI
10.18577/2307-6046-2026-0-3-114-123
Article PDF (Russian) (1 MB)
How to cite
Dvoretskaya E.V., Potapov M.V., Piskorsky V.P., Kolmakov A.O., Morgunov R.B. Qualification of Ni laser ablation products in superfluid helium // Proceedings of VIAM. 2026. No. 3. DOI: 10.18577/2307-6046-2026-0-3-114-123. URL: https://test.viam.ru/en/journal/2026/3/9
Keywords
ferromagnetic nanowires, nanoparticles, nanomeshes, nanomagnets, laser ablation, transition metals, magnetic hysteresis
Abstract

Vacuum annealing of the initially amorphous microwire of the (PrDy)–(CoFe)–B composition the magnetic properties of thin (d < 4 nm) nickel nanowires obtained by laser ablation of a metal target in superfluid helium were studied. It has been found that at low Ni concentrations the samples have a rectangular hysteresis loop, which becomes flatter with increasing Ni concentration on the substrate surface. At late stages of laser ablation the concentration and diameter of round Ni nanoparticles increase, which contributes to a decrease in the coercive force of the nanogrid and a deviation of the hysteresis loop shape from a rectangular one.

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