Structural and magnetic properties of MnCo 1−x Fe x Si alloys

Chen, J.H.; Wei, Zheng; (刘恩克), E.K. Liu; Qi, Xin; Wang, W.H.; Wu, Guangheng

doi:10.1016/j.jmmm.2015.04.005

Cited by 21 publications

(7 citation statements)

References 27 publications

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“…The small exothermic (endothermic) peaks indicate the magnetic transition temperatures. T M declines monotonously with the increasing Fe content, which is in agreement with the results from Fe-doped MM ′ X alloys [34][35][36][37], i.e. Fe content can highly stabilize the parent phase.…”

Section: Resultssupporting

confidence: 90%

“…In addition, the existence of non-collinear magnetic structures with a small spontaneous magnetic moment at 4.2 K for CoMnSi, confirmed by neutron diffraction measurements, has been proven [41]. For CoMnSi-based systems, containing CoMnSi 0.75 Ge 0.25 [41], MnCo 0.9 Ni 0.1 Si [42] and MnCo 1−x Fe x Si [36,43], a smaller d 1 results in an AFM state and a relatively larger d 1 facilitates an FM state. Thus, the AFM-FM transition with magneto-elastic coupling is sensitive to elemental components.…”

Section: Resultsmentioning

confidence: 99%

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Emergent evolution of first-order phase transitions from magneto-structural to magneto-elastic in MnCo_1−yFe _y Ge_1−xSi _x alloys

et al. 2023

J. Phys. Energy

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The emergent evolution of first-order phase transitions from magneto-structural to magneto-elastic and magnetocaloric effect (MCE) have been investigated by X-ray diffraction, differential scanning calorimetry and magnetization measurements. Applying the isostructural alloying principle, the martensitic transition temperature (T M) increases effectively and the Curie temperatures of the two phases increase slightly by substituting the Si content (x). With an appropriate amount of Fe and Si content, an emergent first-order antiferromagnetic–ferromagnetic magnetoelastic transition with thermal hysteresis in the martensitic state occurs for MnCo0.7Fe0.3Ge1–x Si x (x = 0.15–0.40) alloys, which results from the decrease in the nearest-neighbor Mn–Mn distance. Moreover, the values of magnetic entropy change (ΔS M), refrigeration capacity (RC) and temperature-averaged entropy change (TEC, 10 K) with ΔH = 50 kOe reach −12.2 J kg−1 K−1, 112.8 J kg−1 and 11.4 J kg−1 K−1 for MnCo0.7Fe0.3Ge0.8Si0.2 undergoing the ferromagnetic magneto-structural transition in the Curie temperature window. The results facilitate the magnetocaloric/magnetoelastic performance and tunability of multiple phase states in a wider temperature range.

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Section: Resultssupporting

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Emergent evolution of first-order phase transitions from magneto-structural to magneto-elastic in MnCo_1−yFe _y Ge_1−xSi _x alloys

et al. 2023

J. Phys. Energy

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“…In contrast, a first-order magnetic phase transition ideally occurs at a certain temperature (the transition temperature,

T_{t}

) and then the

(||, {((), \frac{\partial M}{\partial T})}_{B})

value should be theoretically infinitely large. Until now, the reported materials with a large MCE near room temperature are: Gd

_{5}

(Si,Ge)

_{4}

[7]; Mn(As,Sb) [8,9]; (Mn,Fe)

_{2}

(P,X) with X = As, Ge, Si [10,11,12]; LaFe

_{13 - x}

_{x}

and its hydrides [13,14,15]; (Mn,Fe)

_{2}

(P,Si,B) [16]; (Mn,Fe)

_{2}

(P,Si,N) [17], NiMn-based Heusler alloys [18], FeRh [19]; MnCoGeB

_{x}

[20]; MnCoGe

_{1 - x}

_{x}

[21]; and MnCo

_{1 - x}

_{x}

Si [22]. Among all above candidates for solid-state refrigerants, the (Mn,Fe)

_{2}

(P,Si)-based materials are some of the most promising because they provide optimal conditions for practical applications (large MCE, low cost starting materials, and environmental benefits).…”

Section: Introductionmentioning

confidence: 99%

Tuneable Giant Magnetocaloric Effect in (Mn,Fe)2(P,Si) Materials by Co-B and Ni-B Co-Doping

2016

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Abstract:The influence of Co (Ni) and B co-doping on the structural, magnetic and magnetocaloric properties of (Mn,Fe) 2 (P,Si) compounds is investigated by X-ray diffraction (XRD), differential scanning calorimetry, magnetic and direct temperature change measurements. It is found that Co (Ni) and B co-doping is an effective approach to tune both the Curie temperature and the thermal hysteresis of (Mn,Fe) 2 (P,Si) materials without losing either the giant magnetocaloric effect or the positive effect of the B substitution on the mechanical stability. An increase in B concentration leads to a rapid decrease in thermal hysteresis, while an increase in the Co or Ni concentration hardly changes the thermal hysteresis of the (Mn,Fe) 2 (P,Si) compounds. However, the Curie temperature decreases slowly as a function of the Co or Ni content, while it increases dramatically for increasing B concentration. Hence, the co-substitution of Fe and P by Co (Ni) and B, respectively, offers a new control parameter to adjust the Curie temperature and reduce the thermal hysteresis of the (Mn,Fe) 2 (P,Si) materials.

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“…Recently, MM′X (M, M′transition metals and Xp-block elements) type compounds have attracted considerable research interest because of their magneto-and thermo-responsive properties [1,2]. In particular, magnetocaloric effect (MCE), a thermal response of a magnetic material upon application or removal of a magnetic field, is of significant importance for its potential application in environmental friendly and energy efficient magnetic cooling technology.…”

Section: Introductionmentioning

confidence: 99%

Comparative phase transformation and magnetocaloric effect study of Co and Mn substitution by Cu in MnCoGe compounds

Pal

Frommen

Kumar

et al. 2019

Journal of Alloys and Compounds

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Structural and magnetic properties of MnCo 1−x Fe x Si alloys

Cited by 21 publications

References 27 publications

Emergent evolution of first-order phase transitions from magneto-structural to magneto-elastic in MnCo_1−yFe _y Ge_1−xSi _x alloys

Emergent evolution of first-order phase transitions from magneto-structural to magneto-elastic in MnCo_1−yFe _y Ge_1−xSi _x alloys

Tuneable Giant Magnetocaloric Effect in (Mn,Fe)2(P,Si) Materials by Co-B and Ni-B Co-Doping

Comparative phase transformation and magnetocaloric effect study of Co and Mn substitution by Cu in MnCoGe compounds

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Structural and magnetic properties of MnCo 1−x Fe x Si alloys

Cited by 21 publications

References 27 publications

Emergent evolution of first-order phase transitions from magneto-structural to magneto-elastic in MnCo1−y Fe y Ge1−x Si x alloys

Emergent evolution of first-order phase transitions from magneto-structural to magneto-elastic in MnCo1−y Fe y Ge1−x Si x alloys

Tuneable Giant Magnetocaloric Effect in (Mn,Fe)2(P,Si) Materials by Co-B and Ni-B Co-Doping

Comparative phase transformation and magnetocaloric effect study of Co and Mn substitution by Cu in MnCoGe compounds

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Emergent evolution of first-order phase transitions from magneto-structural to magneto-elastic in MnCo_1−yFe _y Ge_1−xSi _x alloys

Emergent evolution of first-order phase transitions from magneto-structural to magneto-elastic in MnCo_1−yFe _y Ge_1−xSi _x alloys