Transition metal substitution in Fe2P-based MnFe0.95P0.50Si0.50 magnetocaloric compounds

Ou, Z.Q.; Dung, Nguyen Huu; Zhang, L.; Caron, L. G.; Torun, Engin; Dijk, N.H. van; Tegus, O.; Brück, E.

doi:10.1016/j.jallcom.2017.09.315

Cited by 32 publications

(19 citation statements)

References 29 publications

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“…It is known that the interaction between the nearest 3f-3g inter-layer is responsible for FM ordering in Mn-Fe-P-Si compounds and is more sensitive to changes in the c/a ratio than to the parameters a and c in the lattice itself, resulting in a linear relationship between T c and the c/a ratio. However, substitution alters not only the interatomic distances but also the electron density, which is a key factor in Fe 2 P-based compounds [47].…”

Section: Samplementioning

confidence: 99%

“…On the other hand, substitution of Ru/Ni for Fe in (Mn, Fe)2 PSi was effective in thermal hysteresis reduction to less than 2 K [62, 71]. FOPT and thus high MCE properties for (Mn, Fe) 2 (P, Si) alloys can be preserved by; i) tuning Mn/ Fe and P/Si ratios, ii) performing varied heat treatment and/or iii) introducing doping atoms such as B, C and N exhibiting different effects on thermal/magnetic hysteresis and magnetic interactions[47].Ge-substituted compounds retain Fe 2 P-type crystal structure, but reorientation of lattice parameter leads to changes in inter-atomic distances and exchange interactions between Mn-Mn, Fe-Fe, and Mn-Fe ions. This results in an increase in T c , linearly proportional to Ge contents and with magnetic transition becoming secondorder [54, 64, 70].…”

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confidence: 99%

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MnAs and MnFeP_1−xAs_x-based magnetic refrigerants: a review

Habiba

Khattak

Ali

et al. 2020

Mater. Res. Express

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This paper presents a comparative analysis of MnAs and MnFeP 1−x As x family and its alloys from magnetic refrigeration perspective. A thorough literature review was undertaken and to the best of authors knowledge, all samples (∼100 samples) with their Curie temperature (T c ) in the range 260-340 K have been reported. For contrastive analysis, samples have been grouped based on their structural and experimental conditions such as magnetic field and sample composition etc. For comparative analysis, all variables of magnetocaloric effect (MCE), e.g., T c , magnetic entropy change ( DS M | |), adiabatic temperature change (ΔT ad ) and relative cooling power (RCP) have been considered with calculated missing variables, wherever possible. The first objective of this paper was to perform a comparative analysis of different fabrication variables (e.g., particle size, shape, morphology, chemical composition, structure, purity of starting materials, homogeneity, annealing, and synthesis methods) on the overall MCE properties of the aforementioned family. In addition, the best fabrication practices for further improvement in MCE properties are proposed. The second objective was to observe different material's doping (e.g., Cr, Si, Ge, B) in hysteresis loss mitigation and MCE properties enhancement. Best doping materials were suggested for the compositions, which were displaying optimum MCE properties for further MCE enhancement. Lastly, but most importantly, to propose a high performing magnetic refrigerant by: (1) shortlisting a composition with optimum MCE properties;(2) further enhancement in MCE through adopting best fabrication processes for the said magnetic refrigerant; (3) suggesting best doping material for hysteresis loss mitigation and MCE enhancement; and most importantly (4) fabricating the proposed magnetic refrigerant as a nanostructure; thus, improving MCE properties through broadening of T c curve.

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Section: Samplementioning

confidence: 99%

mentioning

confidence: 99%

MnAs and MnFeP_1−xAs_x-based magnetic refrigerants: a review

Habiba

Khattak

Ali

et al. 2020

Mater. Res. Express

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“…[179] The magnetic moment of Fe atoms at 3f sites responds to the change of interatomic spacing, the total exchange interaction is governed by both Mn-Mn and Mn-Fe interactions. Recently, the crystal structure and MCE of (Mn,Fe,T)1.95P0.50Si0.50 (T = Co, Ni and Cu) compounds have been investigated [180]. These compounds crystallize in the Fe2P-type structure.…”

Section: Mn Based Alloys With Fe2p Crystal Structurementioning

confidence: 99%

“…The origins of hysteresis can be divided into "intrinsic" contributions associated to the electronic properties and "extrinsic" influences associated to microstructure [215] In Mn-Fe-P-Si systems, the hysteresis can be minimized by changing the ratio of Mn/Fe and/or P/Si. Fig 23 shows Curie temperature and thermal hysteresis of (Mn,Fe,T)1.95P0.50Si0.50 as function of the transition metal (Co, Mn, Cu) content [180]. The TC decreases by increasing the substitution of transition metal.…”

Section: Thermal Hysteresismentioning

confidence: 99%

Iron and manganese based magnetocaloric materials for near room temperature thermal management

Chaudhary

Chen

Ramanujan

2019

Progress in Materials Science

122

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“…Hence, one of the followed approaches nowadays is to make the best out of the two regimes and focus on materials lying at the border between the first and the second‐order – the tri‐critical point materials to take advantage of the entropic superiority of first order transition together with no reduction of MCE under cycling . Therefore, as recently highlighted, many studies were focused on understanding the mechanisms of phase transition and predicting the tri‐critcal composition for various family of magnetocaloric materials, like La(FeSi) 13 , Nd 1−x Sr x MnO 3 , MnFePSi, Sn 1−x CMn 3.x , and CoMnSi 0.92 Ge 0.08 …”

Section: Introductionmentioning

confidence: 99%

On the Optimization of Magneto‐Volume Coupling for Practical Applied Field Magnetic Refrigeration

Davarpanah

Belo

Amaral

et al. 2018

Physica Status Solidi (b)

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Materials with strong magneto‐volume coupling can present a coupled first‐order magnetic and structural transition and a giant magnetocaloric effect. The trade‐off of the resulting increased entropy change is hysteresis, and incomplete transition when the applied field is <2 T, implying that the full cooling capacity of the refrigerant is not harnessed. In this work, the behavior of the magnetic entropy change as a function of temperature is simulated, considering the Bean–Rodbell model, for various spin systems with Curie temperatures close to room temperature. Increasing magneto‐volume coupling parameter (η) results in higher entropy change peak value (ΔSMmax), together with a narrowing of entropy change function ΔSM(T), limiting the working temperature range. Accordingly, cooling capacity behaves non‐monotonously, reaching a peak value at ηMAX, which departs from the tri‐critical point as H increases up to 2 T. By tuning η, the cooling capacity can be considerably larger than the uncoupled system (up to 15–40% for low applied fields). Such tuning can be accomplished experimentally through proper chemical substitution. A universal behavior of cooling capacity as a function of ηMAX underlines that the performance of magnetic refrigerant is optimized, by tuning magneto‐volume coupling within the second order range, rather than the tri‐critical region.

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Transition metal substitution in Fe2P-based MnFe0.95P0.50Si0.50 magnetocaloric compounds

Cited by 32 publications

References 29 publications

MnAs and MnFeP_1−xAs_x-based magnetic refrigerants: a review

MnAs and MnFeP_1−xAs_x-based magnetic refrigerants: a review

Iron and manganese based magnetocaloric materials for near room temperature thermal management

On the Optimization of Magneto‐Volume Coupling for Practical Applied Field Magnetic Refrigeration

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Transition metal substitution in Fe2P-based MnFe0.95P0.50Si0.50 magnetocaloric compounds

Cited by 32 publications

References 29 publications

MnAs and MnFeP1−xAsx-based magnetic refrigerants: a review

MnAs and MnFeP1−xAsx-based magnetic refrigerants: a review

Iron and manganese based magnetocaloric materials for near room temperature thermal management

On the Optimization of Magneto‐Volume Coupling for Practical Applied Field Magnetic Refrigeration

Contact Info

Product

Resources

About

MnAs and MnFeP_1−xAs_x-based magnetic refrigerants: a review

MnAs and MnFeP_1−xAs_x-based magnetic refrigerants: a review