Magnetocaloric effect in Fe–Tm–B–Nb metallic glasses near room temperature

Li, Jiawei; Law, Jia Yan; Ma, Haitao; He, Aina; Man, Qikui; He, Meng; Huo, Juntao; Chang, Chuntao; Wang, Xinmin; Li, Run-Wei

doi:10.1016/j.jnoncrysol.2015.06.002

Cited by 29 publications

(5 citation statements)

References 28 publications

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“…As discussed in [49], the possibility of tuning TC whilst keeping the MC properties of a material fairly constant have been one of the most under-studied properties when improving MC-materials performance. Although our ΔSm peak values are an order of magnitude lower than those reported for FeCoNiCuMn [20], (Fe0.76+xTm0.0-xB0.24)96Nb4 [51] and, Mn27Cr7Ni33Ge25Si8 [52], the comparison to the work here should be made with caution. For instance, (Fe0.76+xTm0.0-xB0.24)96Nb4 is of the metallic glass type, Mn27Cr7Ni33Ge25Si8 future a Pnma space structure [52] and magnetic properties as of the FOPT MnCoGe and MnNiGe type of materials [7] [53] and, the ΔSm(T) shape of FeCoNiCuMn-system in [20] reseambles what we obtain at HTT.…”

Section: Analysis: Nps -Cluster Like Behaviour T < Lttcontrasting

confidence: 78%

Study of dual-phase functionalisation of NiCoFeCr-Alx multicomponent alloys for the enhancement of magnetic properties and magneto-caloric effect

Quintana-Nedelcos

Leong

Morley

2021

Materials Today Energy

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Section: Analysis: Nps -Cluster Like Behaviour T < Lttcontrasting

confidence: 78%

Study of dual-phase functionalisation of NiCoFeCr-Alx multicomponent alloys for the enhancement of magnetic properties and magneto-caloric effect

Quintana-Nedelcos

Leong

Morley

2021

Materials Today Energy

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“…different magnetic fields for literature comparison. Compared with SOMT conventional magnetocaloric amorphous alloys based on a single principal element [59][60][61][62][63][64], at least 2-fold improvement in S M max and RCP is found for our work. More than 10% larger S M max (up to 8-fold) is observed when comparing our annealed HE-MG microwires to the conventional alloys exhibiting coexistence of amorphous and nanocrystalline phases [1, 34,[65][66][67][68][69][70].…”

Section: Discussionmentioning

confidence: 74%

Enhancing the magnetocaloric response of high-entropy metallic-glass by microstructural control

et al. 2021

Self Cite

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Non-equiatomic high-entropy alloys (HEAs), the second-generation multi-phase HEAs, have been recently reported with outstanding properties that surpass the typical limits of conventional alloys and/or the first-generation equiatomic single-phase HEAs. For magnetocaloric HEAs, non-equiatomic (Gd36Tb20Co20Al24)100−xFex microwires, with Curie temperatures up to 108 K, overcome the typical low temperature limit of rare-earth-containing HEAs (which typically concentrate lower than around 60 K). For alloys with x = 2 and 3, they possess some nanocrystals, though very minor, which offers a widening in the Curie temperature distribution. In this work, we further optimize the magnetocaloric responses of x = 3 microwires by microstructural control using the current annealing technique. With this processing method, the precipitation of nanocrystals within the amorphous matrix leads to a phase compositional difference in the microwires. The multi-phase character leads to challenges in rescaling the magnetocaloric curves, which is overcome by using two reference temperatures during the scaling procedure. The phase composition difference increases with increasing current density, whereby within a certain range, the working temperature span broadens and simultaneously offers relative cooling power values that are at least 2-fold larger than many reported conventional magnetocaloric alloys, both single amorphous phase or multi-phase character (amorphous and nanocrystalline). Among the amorphous rare-earth-containing HEAs, our work increases the working temperature beyond the typical <60 K limit while maintaining a comparable magnetocaloric effect. This demonstrates that microstructural control is a feasible way, in addition to appropriate compositional design selection, to optimize the magnetocaloric effect of HEAs.

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“…In recent years, some crystalline compounds, such as La-Fe-Si [7], Mn-Fe-P-As [8], Gd-Si-Ge [9], and R 1-x M x MnO 3 (where R = La, Nd, Pr and M = Ca, Sr, Ba, etc) [10], presenting giant |∆S M | produced by first-order magnetic phase transitions (FOMTs) have been reported. However, those crystalline materials possess a narrow working temperature span, accompanied by large hysteresis losses, low mechanical instability, and corrosion resistance [10,11], which restrict their practical application as MCE refrigerants. Different from FOMT magnetocaloric materials, crystalline Gd [12], or Gdbased [13] and Fe-based amorphous alloys [14][15][16], undergo second-order magnetic phase transitions with a wider temperature range, generating competitive |∆S M | or RC values.…”

Section: Introductionmentioning

confidence: 99%

Giant magnetocaloric effect in nanostructured Fe-Co-P amorphous alloys enabled through pulse electrodeposition

Cheng¹,

Li²,

Ullah³

et al. 2020

Nanotechnology

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In this work, amorphous Fe-Co-P films prepared by electrodeposition are found to exhibit dense microstructures with amorphous grains. Through a pulse electrodeposition synthesis route, complex microstructures containing nano-sized grains are obtained in the amorphous alloy films. The nanostructured Fe-Co-P amorphous alloys show superior soft magnetic and magnetocaloric properties as compared with those of other iron-based soft magnetic amorphous alloys reported to date. The coercive field of samples can be as small as 1.6 Oe at room temperature. The magnetocaloric effect (MCE) of the ternary amorphous alloys has been investigated by evaluating the magnetic entropy changes, |∆S M |, from their temperature-dependent magnetization behaviors. The |∆S M | values are as high as 1.846 J kg −1 K −1 with an applied magnetic field of 10 kOe. With a temperature span of 90 K, the refrigerant capacity of samples can be as high as 118.64 J kg −1 . The nanostructure enabled giant MCE in Fe-Co-P amorphous alloys is discussed.

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Magnetocaloric effect in Fe–Tm–B–Nb metallic glasses near room temperature

Cited by 29 publications

References 28 publications

Study of dual-phase functionalisation of NiCoFeCr-Alx multicomponent alloys for the enhancement of magnetic properties and magneto-caloric effect

Study of dual-phase functionalisation of NiCoFeCr-Alx multicomponent alloys for the enhancement of magnetic properties and magneto-caloric effect

Enhancing the magnetocaloric response of high-entropy metallic-glass by microstructural control

Giant magnetocaloric effect in nanostructured Fe-Co-P amorphous alloys enabled through pulse electrodeposition

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