Effect of configuration entropy on magnetocaloric effect of rare earth high-entropy alloy

Lu, Shifan; Ma, L.; Wang, J.; Du, Yanxia; Li, L.; Zhao, Jun; Rao, Guanghui

doi:10.1016/j.jallcom.2021.159918

Cited by 34 publications

(10 citation statements)

References 32 publications

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“…Note that all the high-field S M (T) functions reveals very broad peaks around the Neel point. Such a table-like behavior for the magnetocaloric effect has been recently found in rare-earth high-entropy alloys containing elements with drastically various radii, GdTbHoErLa and GdTbHoErLaY [19]. We can suggest that strong structural defectiveness caused by differences in atom radii is apparently one of the significant factors initiating the table-like behavior for MCE.…”

Section: Magnetic and Magnetocaloric Propertiessupporting

confidence: 70%

“…At a field strength of more than 12 kOe, only one magnetic transition from paramagnetic to ferromagnetic state occurs in Gd-Tb-Dy-Ho-Lu HEA. Magnetic measurements of the MEA at different magnetic field reveal identical behavior for M(T) dependencies in comparison with those taken on similar systems [11,12,14,[16][17][18][19]. The ScGdHo alloy demonstrates a paramagnetic to antiferromagnetic transition at around 109 K when the magnetic field is less than 12 kOe and reveals a paramagnetic to ferromagnetic phase transformation in a field above 12 kOe.…”

Section: Magnetic and Magnetocaloric Propertiesmentioning

confidence: 53%

“…Such behavior is rather unusual for an alloy containing rare earth metals with large magnetic moments. A roughly linear dependence of χ −1 (T ) is often observed in similar multicomponent rare-earth systems [11,12,14,[16][17][18][19]. The classical Curie-Weiss law is usually applied to fit the magnetic susceptibility in the paramagnetic phase.…”

Section: Magnetic and Magnetocaloric Propertiesmentioning

confidence: 99%

“…In this context, rareearth concentrated multi-principal-element systems or so-called high-entropy alloys (HEA) open up great perspectives in the search for efficient magnetic refrigerants. Recent studies of rare-earth HEAs have revealed complex magnetism and interesting caloric effects in these materials [11][12][13][14][15][16][17][18][19]. All these multicomponent alloys demonstrate strong magnetocaloric effect (MCE) over a wide temperature span (a table-like behavior) and consequently increased relative cooling power (RCP).…”

Section: Introductionmentioning

confidence: 99%

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Magnetocaloric Effect in ScGdHo Medium-entropy Alloy

Упоров

Sterkhov

Balyakin

2022

Preprint

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The search for eﬀective solid-state refrigerant for magnetocaloric application is one of the main-stream topics in materials science. Rareearth multi-principal element alloys seem to be promising candidates for these purposes. In this study, we address the issues of structure formation, magnetic and magnetocaloric properties in ScGdHo medium entropy alloy. We perform the ab initio molecular dynamics simulations for the liquid and solid phases in this system and reveal a strong tendency to form a single-phase solid solu-tion. The experimentally fabricated alloy demonstrates a single-phase HCP crystalline structure with high density of defects. The magnetic measurements reveal a complicated magnetic behaviour in the material. The alloy exhibits antiferromagnetic or ferromagnetic behavior depending on the magnetic ﬁeld. We have found that AFM order is preferable under a weak magnetic ﬁeld and FM order occurs when the ﬁeld strength exceeds 12 kOe. The alloy reveals a rather large coercive force in a wide temperature range up to the Neel point. The values of the magnetic entropy change and relative cooling power calculated for a magnetic ﬁeld change of 0-5 T are 8.93 Jkg−1K−1 and 938 J/kg, respectively. The examined ScGdHo alloy demonstrates the best magnetocaloric properties among similar rareearth metal materials discovered to date.

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Section: Magnetic and Magnetocaloric Propertiessupporting

confidence: 70%

Section: Magnetic and Magnetocaloric Propertiesmentioning

confidence: 53%

Section: Magnetic and Magnetocaloric Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Magnetocaloric Effect in ScGdHo Medium-entropy Alloy

Упоров

Sterkhov

Balyakin

2022

Preprint

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“…For the ribbon samples, the applied magnetic field was perpendicular to the ribbon axis. [12,13,30,38] RE-free HEA, [39][40][41] GdSiGe-type, [42][43][44] LaFeSi-type, [45,46] and other-type. [47][48][49][50][51][52][53]…”

Section: Methodsmentioning

confidence: 99%

Large Refrigerant Capacity Induced by Table‐Like Magnetocaloric Effect in High‐Entropy Alloys TbDyHoEr

Zhu

et al. 2023

Adv Eng Mater

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Rare‐earth‐based high‐entropy alloys (HEAs) with large magnetocaloric effect (MCE) have been recently recognized as good candidates for magnetic refrigeration. Herein, the complex magnetic transition, MCE, refrigerant capacity (RC), and magnetic‐phase diagram of single‐phase TbDyHoEr HEA are studied. It is showed in the results that due to complex magnetic transition and an ideal table‐like MCE, the RC of TbDyHoEr is significantly improved from 883.19 to 1049.22 J kg−1 by melt‐spun treatment. In terms of RC value and hysteresis performance, the melt‐spun treatment significantly improves the application potential of TbDyHoEr HEA as a high‐efficient magnetic refrigeration material, and the ideal table‐like MCE in a large temperature range enables this material to meet the requirements of both cryogenic refrigeration and mesothermal refrigeration for an Ericsson cycle.

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Effect of Sc Addition on Magnetocaloric Properties of GdTbDyHo High‐Entropy Alloys

Wang

et al. 2023

Adv Eng Mater

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The magnetocaloric properties of as‐cast (GdTbDyHo)100−xScx (x = 0–0.5 at%) high‐entropy alloys (HEAs) have been studied via microalloying strategy. The results show that microalloying of Sc can effectively enhance the working temperature range and the refrigeration capacity of the base HEA—GdTbDyHo. In particular, with addition of only 0.3 at% Sc, the working temperature range can be elevated up to 108 K under an applied magnetic field of 5 T. This, in turn, results in a remarkable refrigeration capacity as high as 802 J kg−1, which is 30% larger than that of GdTbDyHo HEA. This work shows that microalloying of Sc can be used as an effective way to improve the magnetocaloric performance of rare‐earth HEAs.

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Effect of configuration entropy on magnetocaloric effect of rare earth high-entropy alloy

Cited by 34 publications

References 32 publications

Magnetocaloric Effect in ScGdHo Medium-entropy Alloy

Magnetocaloric Effect in ScGdHo Medium-entropy Alloy

Large Refrigerant Capacity Induced by Table‐Like Magnetocaloric Effect in High‐Entropy Alloys TbDyHoEr

Effect of Sc Addition on Magnetocaloric Properties of GdTbDyHo High‐Entropy Alloys

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