Large refrigerant capacity induced by table-like magnetocaloric effect in amorphous Er0.2Gd0.2Ho0.2Co0.2Cu0.2 ribbons

Li, Lingwei; Xu, Chi; Yuan, Ye; Zhou, Shengqiang

doi:10.1080/21663831.2018.1471749

Cited by 78 publications

(3 citation statements)

References 37 publications

(45 reference statements)

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“…In particular, for MCE research field, evolving to non-equiatomic compositions enables rare-earth (RE)-containing HEAs to surpass their low temperature limit [20,21], and to exhibit large MCE enhancement in transition-metal HEAs due to the firstorder magnetostructural phase transitions [22,23]. Above all, RE-containing HEAs, especially Gd-containing high-entropy metallic glasses (HE-MGs), have received the most attention due to their excellent MCE properties [24][25][26][27][28][29]. However, their Curie temperatures (T C ) are typically below 60 K, which further indicates that their working temperature is limited to that range as their MCE peaks around T C .…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2021

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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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Section: Introductionmentioning

confidence: 99%

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

et al. 2021

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“…It is also a necessary condition for scientific research to realize the development of high precision. Some materials exhibiting large −Δ S M have been found such as, TmCuAl , ErMn 2 Si 2 , ErCr 2 Si 2 and HoCoSi et al.…”

Section: Introductionmentioning

confidence: 99%

Fe doping effect on EuTiO₃: The magnetic properties and giant magnetocaloric effect

Zhang

Hao

et al. 2019

Int J Applied Ceramic Tech

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The magnetic properties and magnetocaloric effect for EuTi 1-x Fe x O 3 (x = 0.05, 0.1) compounds are investigated. When a part of Ti 4+ ions were substituted by Fe ions, the AFM ordering can be significantly changed to be FM. The EuTi 1-x Fe x O 3 (x = 0.05, 0.1) compounds exhibit a PM to FM transition with decreasing temperature and the Curie temperature is 6 K. Under the field changes of 1 T, ÀΔS M max and RC are valued to be 10.1 J/kg K and 50.2 J/kg for EuTi 0.95 Fe 0.05 O 3 ; 9.6 J/kg K and 47.7 J/kg for EuTi 0.9 Fe 0.1 O 3 , without magnetic and thermal hysteresis. RC is almost twice as much as EuTiO 3 (27 J/kg) as substitution of Fe 3+ ions for Ti 4+ ions, which may be attributed to the magnetic transition (AFM to FM). Therefore, the giant ÀΔS M max and large RC suggest the EuTi 1-x Fe x O 3 compounds are good materials for magnetic refrigerant. K E Y W O R D S magnetic entropy change, magnetic phase transformation, magnetocaloric effect

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“…[7][8][9][10] Moreover, researchers have focused on magneto-caloric performances in some selected heavy rare-earth (RE) rich magnetic alloys in amorphous states due to their promising applications. [11][12][13] Compared with the crystallized HRE-rich alloys or compounds, the magnetic-entropy-change maxima, i.e., |∆S M |, for the alloys in amorphous states are usually smaller. However, magnetic transitions for the alloys in amorphous states are somehow broader, since there is no long-range ordering which will widen the peak of |∆S M (T )| curves.…”

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confidence: 99%

Magnetic properties and promising cryogenic magneto-caloric performances of Gd₂₀Ho₂₀Tm₂₀Cu₂₀Ni₂₀ amorphous ribbons*

Zhang

Guo

et al. 2021

Chinese Phys. B

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The magnetic cooling utilizing magneto-caloric effect is recognized as promising energy efficiency and environmentally friendly technology. Here we report a systematical study on the microstructures, magnetic properties and cryogenic magneto-caloric performances of the Gd20Ho20Tm20Cu20Ni20 amorphous ribbons. It is found that the ribbons reveal a second-order phase transition and are accompanied by a table-shaped magneto-caloric effect. The calculated magnetic-entropy-change maximum |ΔS M|, temperature averaged entropy change (i.e., TEC(10)), and refrigerant capacity reach 13.9 J/kg⋅K, 13.84 J/kg⋅K and 740 J/kg with magnetic field change of 0–7 T, respectively, indicating that the present Gd20Ho20Tm20Cu20Ni20 amorphous ribbons are good candidates for magnetic cooling.

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Large refrigerant capacity induced by table-like magnetocaloric effect in amorphous Er_0.2Gd_0.2Ho_0.2Co_0.2Cu_0.2 ribbons

Abstract: Zhou (2018) Large refrigerant capacity induced by table-like magnetocaloric effect in amorphous Er 0.2 Gd 0.2 Ho 0.2 Co 0.2 Cu 0.2 ribbons,

Cited by 78 publications

References 37 publications

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

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

Fe doping effect on EuTiO₃: The magnetic properties and giant magnetocaloric effect

Magnetic properties and promising cryogenic magneto-caloric performances of Gd₂₀Ho₂₀Tm₂₀Cu₂₀Ni₂₀ amorphous ribbons*

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Large refrigerant capacity induced by table-like magnetocaloric effect in amorphous Er0.2Gd0.2Ho0.2Co0.2Cu0.2 ribbons

Abstract: Zhou (2018) Large refrigerant capacity induced by table-like magnetocaloric effect in amorphous Er 0.2 Gd 0.2 Ho 0.2 Co 0.2 Cu 0.2 ribbons,

Cited by 78 publications

References 37 publications

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

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

Fe doping effect on EuTiO3: The magnetic properties and giant magnetocaloric effect

Magnetic properties and promising cryogenic magneto-caloric performances of Gd20Ho20Tm20Cu20Ni20 amorphous ribbons*

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Product

Resources

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Large refrigerant capacity induced by table-like magnetocaloric effect in amorphous Er_0.2Gd_0.2Ho_0.2Co_0.2Cu_0.2 ribbons

Fe doping effect on EuTiO₃: The magnetic properties and giant magnetocaloric effect

Magnetic properties and promising cryogenic magneto-caloric performances of Gd₂₀Ho₂₀Tm₂₀Cu₂₀Ni₂₀ amorphous ribbons*