Magnetocaloric Effect in Amorphous and Partially Crystallized Fe₈₀Zr₇Cr₆Nb₂Cu₁B₄ Alloy

• Authors: A. Łukiewska , J. Olszewski , M. Hasiak , P. Gębara
• Languages of publication: EN

Abstracts

EN

In the present work the microstructure and thermomagnetic properties of Fe₈₀Zr₇Cr₆Nb₂Cu₁B₄ ribbon in the as-quenched state and after the accumulative annealing in the temperature range 600-800 K for 10 min were studied using Mössbauer spectroscopy and vibrating sample magnetometry. The second order phase transition from ferro- to paramagnetic state is observed. The Curie temperature T_{C} defined as inflection point on the magnetization versus temperature curve recorded on zero-field cooled mode equals 262.5 K for the as-quenched material. With increasing the annealing temperature increase of T_{C} is observed. The maximum value of the magnetic entropy change (-ΔS) observed in the vicinity of the Curie point is equal to 0.85 J/(kg K) for the alloy in the as-quenched state. Moreover, for the samples annealed up to 750 K for 10 min the low intensity maximum at about 190 K related to the supplementary magnetic phase is observed. The presence of this phase was confirmed as additional component visible on hyperfine field distributions of Mössbauer spectra.

Keywords

EN

65.60.+a; 75.50.Kj; 75.50.Bb; 75.30.Sg

Discipline

• 65.60.+a: Thermal properties of amorphous solids and glasses: heat capacity, thermal expansion, etc.
• 75.50.Kj: Amorphous and quasicrystalline magnetic materials
• 75.50.Bb: Fe and its alloys
• 75.30.Sg: Magnetocaloric effect, magnetic cooling(for cryogenics, see 07.20.Mc)

• Journal: Acta Physica Polonica A
• Year: 2018
• Volume: 133
• Issue: 3
• Pages: 676-679

Dates

published

2018-03

Contributors

author

A. Łukiewska

• Częstochowa University of Technology, Institute of Physics, Armii Krajowej 19, 42-200 Częstochowa, Poland

author

J. Olszewski

• Częstochowa University of Technology, Institute of Physics, Armii Krajowej 19, 42-200 Częstochowa, Poland

author

M. Hasiak

• Wrocław University of Science and Technology, Smoluchowskiego 25, 50-370 Wrocław, Poland

author

P. Gębara

• Częstochowa University of Technology, Institute of Physics, Armii Krajowej 19, 42-200 Częstochowa, Poland

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Identifiers

DOI

10.12693/APhysPolA.133.676