Anomalous Magnetic Viscosity in (Sm,Zr)Fe 11 Ti Alloys with ThMn 12 -Type Structure

D. S. Neznakhin; Незнахин Д. С.; A. S. Volegov; Волегов А. С.; V. E. Maltseva; Мальцева В. Е.; S. V. Andreev; Андреев С. В.

doi:10.31857/S0015323023600727

Anomalous Magnetic Viscosity in (Sm,Zr)Fe₁₁Ti Alloys with ThMn₁₂-Type Structure

Authors: Neznakhin D.S.¹, Volegov A.S.¹, Maltseva V.E.¹, Andreev S.V.¹
Affiliations:
1. Ural Federal University Named after the First President of Russia B.N. Yeltsin
Issue: Vol 124, No 12 (2023)
Pages: 1205-1210
Section: ЭЛЕКТРИЧЕСКИЕ И МАГНИТНЫЕ СВОЙСТВА
URL: https://ruspoj.com/0015-3230/article/view/663039
DOI: https://doi.org/10.31857/S0015323023600727
EDN: https://elibrary.ru/GGOETV
ID: 663039

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Abstract

Abstract—

Magnetic properties of the microcrystalline Sm_{1 –} _xZr_xFe₁₁Ti (x = 0, 0.1, 0.2) alloys with ThMn₁₂-type structure were investigated. Irreversible jumps of magnetization on major hysteresis loops at low temperatures (2–4 K) were found. The jumps are random either in the magnitude of the magnetic field in which they occur or in their amplitude, and are independent of the chemical composition. There is a specific annealing temperature for each alloy, above which magnetization jumps are not observed in annealed alloys at low temperatures. The magnetic viscosity of Sm_0.9Zr_0.1Fe₁₁Ti alloy annealed at 700°C was investigated at temperatures of 2–4 K. The magnetic viscosity coefficient has a discontinuity in the field of magnetization jump. This behavior is explained by thermal processes occurring during magnetization of the alloy through the magnetization jump.

Keywords

irreversible magnetization reversal, magnetization jumps, anomalous magnetic viscosity, negative magnetic viscosity, ThMn12-type phase

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