Influence of mode of local laser annealing on the domain structure in microwires PrDyFeCoB

Dvoretskaya E.V., Koplak O.V., Korolev D.V., Valeev R.A., Sidorov V.L., Piskorsky V.P., Morgunov R.B.
UDC
631.437.8
DOI
10.18577/2307-6046-2022-0-5-64-73
Article PDF (Russian) (1.01 MB)
How to cite
Dvoretskaya E.V., Koplak O.V., Korolev D.V., Valeev R.A., Sidorov V.L., Piskorsky V.P., Morgunov R.B. Influence of mode of local laser annealing on the domain structure in microwires PrDyFeCoB // Proceedings of VIAM. 2022. No. 5. DOI: 10.18577/2307-6046-2022-0-5-64-73. URL: https://test.viam.ru/en/journal/2022/5/6
Keywords
permanent magnets, micromagnets, magnetically modulated structures, laser irradiation, amorphous magnets, magnetic microwires
Abstract

. With the help of continuous IR laser exposure, periodic magnetically modulated structures were created from amorphous microwires. Local laser annealing leads to the formation of regions of nanocrystalline phases 2-14-1, 1-4-1, 2-1 alternating with amorphous regions, thereby creating a pattern on the sample surface with a given magnetization distribution. In amorphous samples without laser irradiation, chaotic domains are observed, disappearing after two hours of annealing at 900 °C. In the samples profiled by a «fast» laser, local annealing leads to further transformation of phases only in the very center of the laser «notches», which is expressed in a change in the slope of the profile line near the domain boundary.

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