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

Zhu, Wenzhong; Ma, L.; He, Mufen; Li, Zhikun; Zhang, Huanzhi; Yao, Qingrong; Rao, Guanghui; Su, Kunpeng; Zhong, Xichun; Liu, Zhongwu; Gao, Xinqiang

doi:10.1002/adem.202201770

Cited by 9 publications

(2 citation statements)

References 57 publications

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“…A number of materials have been investigated for magnetocaloric refrigeration across different temperature ranges. [57][58][59] For example, La(FeSi) 13 [60] displays a temperature change of 6.9 K at an operating temperature of 190 K, while Mn 3 GaC [61] exhibits a temperature variation of 4.5 K at 163 K, and Gd 2 Si 2 Ge 2 [62] has a temperature change of 4.9 K at 262 K under an applied magnetic field of 2 T. These materials exhibit the most significant temperature change at the phase-transition temperature, and their operating range and cooling capacity depend on the width and characteristics of their magnetic phase transition.…”

Section: Introductionmentioning

confidence: 99%

Development of Magnetocaloric Microstructures from Equiatomic Iron–Rhodium Nanoparticles through Laser Sintering

et al. 2023

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Pronounced magnetocaloric effects are typically observed in materials that often contain expensive and rare elements and are therefore costly to mass produce. However, they can rather be exploited on a small scale for miniaturized devices such as magnetic micro coolers, thermal sensors, and magnetic micropumps. Herein, a method is developed to generate magnetocaloric microstructures from an equiatomic iron–rhodium (FeRh) bulk target through a stepwise process. First, paramagnetic near‐to‐equiatomic solid‐solution FeRh nanoparticles (NPs) are generated through picosecond (ps)‐pulsed laser ablation in ethanol, which are then transformed into a printable ink and patterned using a continuous wave laser. Laser patterning not only leads to sintering of the NP ink but also triggers the phase transformation of the initial γ‐ to B2‐FeRh. At a laser fluence of 246 J cm−2, a partial (52%) phase transformation from γ‐ to B2‐FeRh is obtained, resulting in a magnetization increase of 35 Am2 kg−1 across the antiferromagnetic to ferromagnetic phase transition. This represents a ca. sixfold enhancement compared to previous furnace‐annealed FeRh ink. Finally, herein, the ability is demonstrated to create FeRh 2D structures with different geometries using laser sintering of magnetocaloric inks, which offers advantages such as micrometric spatial resolution, in situ annealing, and structure design flexibility.

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Section: Introductionmentioning

confidence: 99%

Development of Magnetocaloric Microstructures from Equiatomic Iron–Rhodium Nanoparticles through Laser Sintering

et al. 2023

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“…A change in sample temperature following an adiabatic change in the applied magnetic field is known as the magnetocaloric effect (MCE), which is an inherent feature of magnetic systems [32]. MCE has been extensively used in room and cryogenic temperature refrigeration applications [33,34]. In recent years, many experimental studies have found that the originally non-magnetic graphene can be made magnetic by doping magnetic transition metal atoms or through their replacement [35,36].…”

Section: Introductionmentioning

confidence: 99%

Insight into the magnetic behavior and magnetocaloric effect of a borophene monolayer

Wang

Xiao

et al. 2023

Commun. Theor. Phys.

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The successful discovery of borophene has opened a new door for the development of two-dimensional materials. Owing to its excellent chemical, electronic and thermal properties, borophene has shown considerable potential in supercapacitor, hydrogen-storage and battery. In this paper, the thermodynamic characteristics and magnetocaloric effect of a borophene are studied specifically by using Monte Carlo method. We find that there is an opposite impact between the spin quantum number and crystal field on the magnetization, magnetic susceptibility, specific heat and magnetic entropy of the system. Moreover, increasing the spin quantum number or decreasing the absolute value of the crystal field can improve the relative cooling power (RCP), the coercivity (hc) and the remanence (MR) and the area of the loop.

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

Cited by 9 publications

References 57 publications

Development of Magnetocaloric Microstructures from Equiatomic Iron–Rhodium Nanoparticles through Laser Sintering

Development of Magnetocaloric Microstructures from Equiatomic Iron–Rhodium Nanoparticles through Laser Sintering

Insight into the magnetic behavior and magnetocaloric effect of a borophene monolayer

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

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