Effect of Dy substitution in the giant magnetocaloric properties of HoB<sub>2</sub>

Castro, Pedro Baptista de; Terashima, Kazuhiko; Yamamoto, Takafumi; Iwasaki, Suguru; Matsumoto, Ryo; Adachi, Shintaro; Saito, Yoshito; Takeya, Hiroyuki; Takano, Yoshihiko

doi:10.1080/14686996.2020.1856629

Cited by 7 publications

(2 citation statements)

References 41 publications

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“…Previously, the magnetocaloric properties of DyB 2 had been studied, with a lower but remarkable MCE. 206 DyB 2 and HoB 2 behave as standard ferromagnets with Curie temperatures at 50 and 15 K respectively, and additional SR transitions at 20 and 12 K. The proximity between the FM to PM and SR phase transitions in HoB 2 might explain the large magnetothermal response observed in this compound. The pseudobinary system formed by the solid solution of Ho and Dy (Ho x Dy 1-x B 2 ) has been fully studied for the whole x range.…”

Section: Rare-earth -Non-metal Compoundsmentioning

confidence: 93%

Magnetocaloric materials for hydrogen liquefaction

Romero-Muñiz,

Law,

Revuelta-Losada

et al. 2023

TIMS

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<p>The expected energy transition to hydrogen gas as a greener energy vector has revived the interest in magnetic refrigeration at the cryogenic range, specifically between 20 and 80 K, with the vision to develop a new generation of hydrogen gas liquefiers. From the materials science point of view, the search for magnetocaloric materials containing mainly non-critical elements with a significant response in that temperature range, together with good cyclability and stability, is a challenging task. Given the increasing interest of the research community on this topic, we aim to establish a comprehensive catalog of the magnetocaloric compounds characterized so far, to be used as a starting point for further research. For this purpose, a systematic outlook of the state of the art is presented here, with the analysis and classification of more than 400 cryogenic magnetocaloric materials, divided into five large families according to their physicochemical properties. Moreover, we provide detailed information about their magnetocaloric properties, magnetic behavior, and transition characteristics together with criticality, which will facilitate the future search for optimal compounds.</p>

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Section: Rare-earth -Non-metal Compoundsmentioning

confidence: 93%

Magnetocaloric materials for hydrogen liquefaction

Romero-Muñiz,

Law,

Revuelta-Losada

et al. 2023

TIMS

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“…Putting aside the criticality of the raw materials for a moment, heavy rare-earth based magnetocaloric materials would be strong contenders for magnetocaloric hydrogen liquefaction in the context of performance. Materials such as HoB 2 [15,41,42], ErCo 2 [43,44], DyAl 2 [45], and ErAl 2 [45,46] show large ∆S T and ∆T ad due to the large magnetic moments of the heavy rare-earth ions, and they are often proposed to be used in an active magnetic regenerator for hydrogen liquefaction. Because of the excellent magnetocaloric properties, heavy rare-earth based materials are intensively studied.…”

Section: Introductionmentioning

confidence: 99%

Designing magnetocaloric materials for hydrogen liquefaction with light rare-earth Laves phases

et al. 2023

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Magnetocaloric hydrogen liquefaction could be a “game-changer” for liquid hydrogen industry. Although heavy rare-earth based magnetocaloric materials show strong magnetocaloric effects in the temperature range required by hydrogen liquefaction (77 ~ 20 K), the high resource criticality of the heavy rare-earth elements is a major obstacle for upscaling this emerging liquefaction technology. In contrast, the higher abundances of the light rare-earth elements make their alloys highly appealing for magnetocaloric hydrogen liquefaction. Via a mean-field approach, it is demonstrated that tuning the Curie temperature (TC) of an idealized light rare-earth based magnetocaloric material towards lower cryogenic temperatures leads to larger maximum magnetic and adiabatic temperature changes (ΔST and ΔTad). Especially in the vicinity of the condensation point of hydrogen (20 K), ΔST and ΔTad of the optimized light rare-earth based material are predicted to show significantly large values. Following the mean-field approach and taking the chemical and physical similarities of the light rare-earth elements into consideration, a method of designing light rare-earth intermetallic compounds for hydrogen liquefaction is used: tunning TC of a rare-earth alloy to approach 20 K by mixing light rare-earth elements with different de Gennes factors. By mixing Nd and Pr in Laves phase (Nd,Pr)Al2, and Pr and Ce in Laves phase (Pr, Ce)Al2, a fully light rare-earth intermetallic series with large magnetocaloric effects covering the temperature range required by hydrogen liquefaction is developed, demonstrating a competitive maximum effect compared to the heavy rare-earth compound DyAl2.

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Modern rare-earth-containing magnetocaloric materials: Standing on the shoulders of giant Gd5Si2Ge2

Law,

Franco

2023

Handbook on the Physics and Chemistry of Rare Earths

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Effect of Dy substitution in the giant magnetocaloric properties of HoB₂

Cited by 7 publications

References 41 publications

Magnetocaloric materials for hydrogen liquefaction

Magnetocaloric materials for hydrogen liquefaction

Designing magnetocaloric materials for hydrogen liquefaction with light rare-earth Laves phases

Modern rare-earth-containing magnetocaloric materials: Standing on the shoulders of giant Gd5Si2Ge2

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Effect of Dy substitution in the giant magnetocaloric properties of HoB2

Cited by 7 publications

References 41 publications

Magnetocaloric materials for hydrogen liquefaction

Magnetocaloric materials for hydrogen liquefaction

Designing magnetocaloric materials for hydrogen liquefaction with light rare-earth Laves phases

Modern rare-earth-containing magnetocaloric materials: Standing on the shoulders of giant Gd5Si2Ge2

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Effect of Dy substitution in the giant magnetocaloric properties of HoB₂