Effect of Co and Ni doping on the structure, magnetic and magnetocaloric properties of Fe-rich (Mn,Fe)2(P,Si) compounds

Journal article (2022)

Authors

A. Kiecana RST/Fundamental Aspects of Materials and Energy - AS
I. Batashev RST/Fundamental Aspects of Materials and Energy - AS
A. Iulian Dugulan RID/TS/Instrumenten groep
A.I. Dugulan RID/TS/Instrumenten groep
C. Kwakernaak Team Maria Santofimia Navarro - Mechanical, Maritime and Materials Engineering
L. Pieter Student
F. Zhang RST/Fundamental Aspects of Materials and Energy - AS
N.H. van Dijk RST/Fundamental Aspects of Materials and Energy - AS
E.H. Brück RST/Fundamental Aspects of Materials and Energy - AS
Research Group
RST/Fundamental Aspects of Materials and Energy (AS) (TU Delft)
Copyright: © 2022 A. Kiecana, I. Batashev, A.I. Dugulan, C. Kwakernaak, L. Pieter, F. Zhang, N.H. van Dijk, E.H. Brück
DOI: https://doi.org/10.1016/j.jmmm.2022.169710
More Info
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Published Date

2022

Language

English

Faculty

Applied Sciences

Department

RST/Radiation, Science and Technology

Research Group

RST/Fundamental Aspects of Materials and Energy

Abstract

The effect of Co and Ni doping on the structure, magnetic and magnetocaloric properties of Fe-rich (Mn,Fe)2(P,Si) compounds was studied. With increasing Co and Ni content, both the Curie temperature (Tc) and the thermal hysteresis (ΔThys) decreased, whereas the hexagonal P-62 m crystal structure was maintained. A pronounced reduction in hysteresis was observed upon Co doping, while a significant reduction in Curie temperature was found upon Ni doping. Mössbauer spectroscopy measurements and DFT calculations indicated the substitution of Fe at the 3f site for both Co and Ni doping. Rietveld refinement of the X-ray diffraction data showed that Co substitute atoms in the main phase and the impurity phase, while Ni exhibits an affinity to the main phase. Magnetization measurements on the Co doped samples revealed an increase in magnetization for 2 at.% of Co, followed by a decrease for higher concentrations. DFT calculations showed that the magnetic moment on the 3f site is enhanced by Co substitution, whereas an opposite trend was observed for Ni substitution.