Recent progresses in exploring the rare earth based intermetallic compounds for cryogenic magnetic refrigeration

Li, Lingwei; Yan, Mi

doi:10.1016/j.jallcom.2020.153810

Cited by 277 publications

(96 citation statements)

References 180 publications

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“…The vapor-compression refrigeration, a widely used technology in transportation, and residential, commercial, and industrial refrigeration, can no longer meet the current development needs due to its low efficiency, adverse environmental impact, and noise of the compressor. Several researchers have shifted their focus to magnetic refrigeration (MR) based on the magnetocaloric effect (MCE) of magnetic materials due to their distinguished performance without relying on any hazardous or ozonedepleting refrigerant gas and noise-free advantage [1][2][3][4][5][6][7]. The use of natural gas as well as H 2 , He, N 2 , and O 2 , is widely extended with several scientific, industrial, and commercial purposes.…”

Section: Introductionmentioning

confidence: 99%

First- and second-order phase transitions in RE6Co2Ga (RE = Ho, Dy or Gd) cryogenic magnetocaloric materials

et al. 2021

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Rare-earth (RE) rich intermetallics crystallizing in orthorhombic Ho6Co2Ga-type crystal structure exhibit peculiar magnetic properties that are not widely reported for their magnetic ordering, order of magnetic phase transition, and related magnetocaloric behavior. By tuning the type of RE element in RE6Co2Ga (RE = Ho, Dy or Gd) compounds, metamagnetic anti-to-paramagnetic (AF to PM) phase transitions could be tuned to ferro-to-paramagnetic (FM to PM) phase transitions. Furthermore, the FM ground state for Gd6Co2Ga is confirmed by density functional theory calculations in addition to experimental observations. The field dependence magnetocaloric and Banerjee’s criteria demonstrate that Ho6Co2Ga and Dy6Co2Ga undergo a first-order phase transition in addition to a second-order phase transition, whereas only the latter is observed for Gd6Co2Ga. The two extreme alloys of the series, Ho6Co2Ga and Gd6Co2Ga, show maximum isothermal entropy change (∣ΔS iso max (5 T)∣) of 10.1 and 9.1 J kg−1K−1 at 26 and 75 K, close to H2 and N2 liquefaction, respectively. This outstanding magnetocaloric effect performance makes the RE6Co2Ga series of potential for cryogenic magnetic refrigeration applications.

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Section: Introductionmentioning

confidence: 99%

First- and second-order phase transitions in RE6Co2Ga (RE = Ho, Dy or Gd) cryogenic magnetocaloric materials

et al. 2021

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“…MCEs at low temperatures also attract attention for cryogen applications like for liquefying natural gases 16 , 17 . Not only alloys but also magnetic oxides including rare earth elements with large magnetic moments were also studied as MCE materials for hydrogen liquefying, which is expected to be green fuel instead of fossil fuel 18 – 20 . Electrocaloric effects (ECEs), on the other hand, were found in ferroelectric and pyroelectric compounds 21 , 22 .…”

Section: Introductionmentioning

confidence: 99%

Giant multiple caloric effects in charge transition ferrimagnet

Kosugi

Goto

Tan

et al. 2021

Sci Rep

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Caloric effects of solids can provide us with innovative refrigeration systems more efficient and environment-friendly than the widely-used conventional vapor-compression cooling systems. Exploring novel caloric materials is challenging but critically important in developing future technologies. Here we discovered that the quadruple perovskite structure ferrimagnet BiCu3Cr4O12 shows large multiple caloric effects at the first-order charge transition occurring around 190 K. Large latent heat and the corresponding isothermal entropy change, 28.2 J K−1 kg−1, can be utilized by applying both magnetic fields (a magnetocaloric effect) and pressure (a barocaloric effect). Adiabatic temperature changes reach 3.9 K for the 50 kOe magnetic field and 4.8 K for the 4.9 kbar pressure, and thus highly efficient thermal controls are achieved in multiple ways.

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“…Изучение физических свойств семейства тройных интерметаллидов RT X (R -редкоземельный металл, T и X соответственно, d-и p-металлы) вызывает значительный интерес благодаря многообразию их магнитных и электронных характеристик, а также возможностям для практического использования (см. обзоры [1][2][3]). В последние годы было синтезировано и исследовано большое количество таких соединений, показано, что уникальность их свойств зависит от особенностей гибридизации и взаимодействия локализованных 4 f -электронов редкоземельного металла с электронами переходных металлов.…”

Section: Introductionunclassified

Электронная структура и оптические спектры соединений GdFeAl и GdFeSi

Князев¹,

Лукоянов²,

Кузьмин³

et al. 2021

Физика Твердого Тела

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Results of investigations of electronic structure and optical properties of GdFeAl and GdFeSi compounds are presented. Spin-plarized density of states and interband optical conductivity spectra were calculated in frame of DFT+U technique with a correction for strong correlation effects in 4f shell of Gd. Optical properties were measured by ellipsometric technique in wavelength interval of 0.22 – 16 μm. Nature of quantum light absorption is discussed on the base of comparative analysis of experimental and calculated spectra. It is shown that main features of frequency dependencies of the optical conductivity are interpret qualitatively by the calculated density of electronic states.

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Recent progresses in exploring the rare earth based intermetallic compounds for cryogenic magnetic refrigeration

Cited by 277 publications

References 180 publications

First- and second-order phase transitions in RE6Co2Ga (RE = Ho, Dy or Gd) cryogenic magnetocaloric materials

First- and second-order phase transitions in RE6Co2Ga (RE = Ho, Dy or Gd) cryogenic magnetocaloric materials

Giant multiple caloric effects in charge transition ferrimagnet

Электронная структура и оптические спектры соединений GdFeAl и GdFeSi

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