Impact of W doping on Fe-rich (Mn,Fe)2(P,Si) based giant magnetocaloric materials

Fengqi Zhang; Sebastian Smits; Anika Kiecana; Ivan Batashev; Qi Shen; Niels van Dijk; Ekkes Brück

doi:10.1016/j.jallcom.2022.167802

Impact of W doping on Fe-rich (Mn,Fe)₂(P,Si) based giant magnetocaloric materials

Fengqi Zhang^*, Sebastian Smits, Anika Kiecana, Ivan Batashev, Qi Shen, Niels van Dijk, Ekkes Brück

^*Corresponding author for this work

RST/Fundamental Aspects of Materials and Energy

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Abstract

The influence of doping with the 5d transition metal W has been studied in the quaternary (Mn,Fe)₂(P,Si) based giant magnetocaloric compounds, which is one of the most promising systems for magnetic refrigeration. It is found that W substitution can separately decrease the Curie temperature T_C and retain the thermal hysteresis ∆T_hys at an almost constant level (∼5 K) for Mn_0.6Fe_1.27-xW_xP_0.64Si_0.36 (x ≤ 0.02). Low-content W doping conserves the good magnetocaloric effect (MCE) without an obvious degradation. For x ≤ 0.02 the average magnetic entropy change |∆S_m| amounts to 11.4 Jkg⁻¹K⁻¹ for an applied magnetic field change of 2 T and the adiabatic temperature change ∆T_ad amounts to 3.9 K for an applied magnetic field change of 1.5 T. The occupancy of substitutional W atoms is determined by XRD experiments and DFT calculations. Our studies provide a good strategy to further optimize the MCE of this material family.

Original language	English
Article number	167802
Number of pages	6
Journal	Journal of Alloys and Compounds
Volume	933
DOIs	https://doi.org/10.1016/j.jallcom.2022.167802
Publication status	Published - 2023

Keywords

(Mn,Fe)(P,Si)
Magnetic phase transition, low hysteresis
Magnetocaloric effect
W doping

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10.1016/j.jallcom.2022.167802

1-s2.0-S0925838822041937-mainFinal published version, 4.33 MBLicence: CC BY

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title = "Impact of W doping on Fe-rich (Mn,Fe)2(P,Si) based giant magnetocaloric materials",

abstract = "The influence of doping with the 5d transition metal W has been studied in the quaternary (Mn,Fe)2(P,Si) based giant magnetocaloric compounds, which is one of the most promising systems for magnetic refrigeration. It is found that W substitution can separately decrease the Curie temperature TC and retain the thermal hysteresis ∆Thys at an almost constant level (∼5 K) for Mn0.6Fe1.27-xWxP0.64Si0.36 (x ≤ 0.02). Low-content W doping conserves the good magnetocaloric effect (MCE) without an obvious degradation. For x ≤ 0.02 the average magnetic entropy change |∆Sm| amounts to 11.4 Jkg−1K−1 for an applied magnetic field change of 2 T and the adiabatic temperature change ∆Tad amounts to 3.9 K for an applied magnetic field change of 1.5 T. The occupancy of substitutional W atoms is determined by XRD experiments and DFT calculations. Our studies provide a good strategy to further optimize the MCE of this material family.",

keywords = "(Mn,Fe)(P,Si), Magnetic phase transition, low hysteresis, Magnetocaloric effect, W doping",

author = "Fengqi Zhang and Sebastian Smits and Anika Kiecana and Ivan Batashev and Qi Shen and {van Dijk}, Niels and Ekkes Br{\"u}ck",

year = "2023",

doi = "10.1016/j.jallcom.2022.167802",

language = "English",

volume = "933",

journal = "Journal of Alloys and Compounds",

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TY - JOUR

T1 - Impact of W doping on Fe-rich (Mn,Fe)2(P,Si) based giant magnetocaloric materials

AU - Zhang, Fengqi

AU - Smits, Sebastian

AU - Kiecana, Anika

AU - Batashev, Ivan

AU - Shen, Qi

AU - van Dijk, Niels

AU - Brück, Ekkes

PY - 2023

Y1 - 2023

N2 - The influence of doping with the 5d transition metal W has been studied in the quaternary (Mn,Fe)2(P,Si) based giant magnetocaloric compounds, which is one of the most promising systems for magnetic refrigeration. It is found that W substitution can separately decrease the Curie temperature TC and retain the thermal hysteresis ∆Thys at an almost constant level (∼5 K) for Mn0.6Fe1.27-xWxP0.64Si0.36 (x ≤ 0.02). Low-content W doping conserves the good magnetocaloric effect (MCE) without an obvious degradation. For x ≤ 0.02 the average magnetic entropy change |∆Sm| amounts to 11.4 Jkg−1K−1 for an applied magnetic field change of 2 T and the adiabatic temperature change ∆Tad amounts to 3.9 K for an applied magnetic field change of 1.5 T. The occupancy of substitutional W atoms is determined by XRD experiments and DFT calculations. Our studies provide a good strategy to further optimize the MCE of this material family.

AB - The influence of doping with the 5d transition metal W has been studied in the quaternary (Mn,Fe)2(P,Si) based giant magnetocaloric compounds, which is one of the most promising systems for magnetic refrigeration. It is found that W substitution can separately decrease the Curie temperature TC and retain the thermal hysteresis ∆Thys at an almost constant level (∼5 K) for Mn0.6Fe1.27-xWxP0.64Si0.36 (x ≤ 0.02). Low-content W doping conserves the good magnetocaloric effect (MCE) without an obvious degradation. For x ≤ 0.02 the average magnetic entropy change |∆Sm| amounts to 11.4 Jkg−1K−1 for an applied magnetic field change of 2 T and the adiabatic temperature change ∆Tad amounts to 3.9 K for an applied magnetic field change of 1.5 T. The occupancy of substitutional W atoms is determined by XRD experiments and DFT calculations. Our studies provide a good strategy to further optimize the MCE of this material family.

KW - (Mn,Fe)(P,Si)

KW - Magnetic phase transition, low hysteresis

KW - Magnetocaloric effect

KW - W doping

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DO - 10.1016/j.jallcom.2022.167802

M3 - Article

AN - SCOPUS:85141227075

SN - 0925-8388

VL - 933

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

M1 - 167802

ER -

Impact of W doping on Fe-rich (Mn,Fe)₂(P,Si) based giant magnetocaloric materials

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