Magnetoresistance of microneedles (Pr, Dy)(Fe, Co)B

Dvoretskaya E.V., Potapov M.V., Valeev R.A., Piskorsky V.P., Morgunov R.B.
UDC
631.437.8
DOI
10.18577/2307-6046-2025-0-1- 46-59
Article PDF (Russian) (1.03 MB)
How to cite
Dvoretskaya E.V., Potapov M.V., Valeev R.A., Piskorsky V.P., Morgunov R.B. Magnetoresistance of microneedles (Pr, Dy)(Fe, Co)B // Proceedings of VIAM. 2025. No. 1. DOI: 10.18577/2307-6046-2025-0-1- 46-59. URL: https://test.viam.ru/en/journal/2025/1/5
Keywords
ferromagnetic microneedles, magnetoresistance, saturation magnetization, micromagnets, electrical conductivity, microwave magnetoresistance, magnetic hysteresis, rare earth alloys
Abstract

The electrophysical properties of microneedles α-Fe (Pr, Dy)(Fe, Co)B at direct current and in the mode of recording the Q-factor of the resonator in an ultrahigh frequency (1010 Hz) magnetic field directed perpendicular to the constant field are investigated. It is established that the specific resistance of microneedles at direct current is in the range (1,5–2,5)·10‒6 Om·m. The magnetoresistance of R(H) microneedles and its magnetic hysteresis at direct current have been detected. The maximum value of the magnetoresistance is R = 1,18 %. The orientation dependence of the maximum dependence dP/dH(H) is revealed.

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