Structure, magnetism and magnetocalorics of Fe-rich (Mn,Fe)<sub>1.95</sub>P<sub>1-x</sub>Si<sub>x</sub> melt-spun ribbons

Journal article (2017)

Authors

Z. Ou RST/Fundamental Aspects of Materials and Energy - AS , Inner Mongolia Normal University China
L. Zhang RST/Fundamental Aspects of Materials and Energy - AS , BASF Nederland B.V.
H.D. Nguyen Hanoi University of Science and Technology, RST/Fundamental Aspects of Materials and Energy - AS
L. Caron RST/Fundamental Aspects of Materials and Energy - AS , Max Planck Institute for Chemical Physics of Solids
E.H. Brück RST/Fundamental Aspects of Materials and Energy - AS
Research Group
RST/Fundamental Aspects of Materials and Energy (AS) (TU Delft)
Phase transition Thermal hysteresis Magnetocaloric effects Mn-Fe-P-Si ribbon
More Info
expand_more

Published Date

2017

Language

English

Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Faculty

Applied Sciences

Department

RST/Radiation, Science and Technology

Research Group

RST/Fundamental Aspects of Materials and Energy

Abstract

Single phase Mn0.66Fe1.29P1-xSix (0 ≤ x ≤ 0.42) compounds were synthesized using the melt-spinning (rapid solidification) technique. All the compounds form in the Fe2P-type hexagonal structure, except a Co2P-type orthorhombic structure of the Si-free Mn0.66Fe1.29P compound. The compounds with 0.24 ≤ x ≤ 0.42 present a FM-PM phase transition, while the compounds with lower Si content show an AFM-PM phase transition. In the Mn0.66Fe1.29P1-xSix compounds, TC and ΔThys are not only Si content dependent, but also magnetic field dependent. By increasing the Si content from x = 0.24 to 0.42, TC increases from 195 to 451 K and ΔThys is strongly reduced from ∼61 to ∼1 K. TC increases and ΔThys decreases with increasing magnetic field, ΔTC/ΔB is about 4.4 K/T. Mn0.66Fe1.29P1-xSix compounds show large saturation magnetic moments with values up to 4.57 μB/f.u. A large MCE with a small thermal hysteresis is obtained simultaneously in Fe-rich Mn0.66Fe1.29P1-xSix melt-spun ribbons.