Crystallographic, magnetic and magnetocaloric properties in novel intermetallic materials R3CoNi (R = Tb, Dy, Ho, Er, Tm, Lu)

Herrero, A.; Oleaga, A.; Provino, A.; Aseguinolaza, I. R.; Salazar, A.; Peddis, Davide; Manfrinetti, P.

doi:10.1016/j.jallcom.2021.158948

Cited by 20 publications

(7 citation statements)

References 58 publications

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“…This effect has also been found in some other members of the family R 3 CoNi (R = Tb, Dy, and Er). 13 Nd 1.5 Gd 1.5 CoNi also shows a small inverse magnetocaloric effect that quickly turns to a direct one, as the field is applied, which agrees with the acquisition of full ferromagnetic properties at a low field. However, these phenomena are small FIG.…”

Section: Magnetocaloric Propertiessupporting

confidence: 80%

“…The ZFC and FC curves separate further one from another as x is raised, indicating the introduction of thermomagnetic irreversibility, which is typical of many ferro/ferrimagnetic transitions, including the other members of the R 3 CoNi family (R = Tb, Dy, Ho, Er, and Tm) already studied. 13 Only in the case of Gd 3 CoNi this effect does not take place. 11 Around 50 K (but with a small drift to a lower temperature as Nd concentration is increased) a peak in the real part of the ac susceptibility emerges, which corresponds to a bump in the magnetization, for the four compounds.…”

Section: B Magnetic Propertiesmentioning

confidence: 98%

“…The few studies performed on the particular family of ternary intermetallics R 3 CoNi (R = Gd, Tb, Dy, Ho, Er, and Tm) [11][12][13] have shown that they present relevant magnetocaloric properties from very low temperature to 170 K (the latter being the case of Gd 3 CoNi). The aim of this work is to study how the addition of Nd changes these properties and if at some composition they might be remarkable.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Nd doping on the crystallographic, magnetic, and magnetocaloric properties of NdxGd3−xCoNi

et al. 2023

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The crystal structure, magnetic and magnetocaloric properties, and the critical behavior of representative compounds in the pseudo-ternary NdxGd3−xCoNi series have been investigated (x = 0.15, 0.5, 1.0, and 1.5). All these phases are isotypic with the parent compound Gd3CoNi, crystallizing with the monoclinic Dy3Ni2-type (mS20, C2/m, No. 12). All samples present a paramagnetic to ferromagnetic (PM-FM) second order phase transition with decreasing Curie temperature as the Nd concentration is increased (TC = 171, 150, 120, and 96 K, respectively) and, at lower temperatures, there is a spin reorientation, which leads to a complex magnetic ground state. The critical exponents (β, γ, and δ) have been retrieved for the PM-FM transitions. On the one hand, in x = 0.15, 0.5, and 1.5 the value of γ ≈ 1 indicates that the magnetic interactions are long-range order while the values of β point to a certain deviation from the 3D-Heisenberg universality class; on the other hand, NdGd2CoNi has a particular critical behavior, as β is close to the mean field model while γ is close to the uniaxial 3D-Ising one. Concerning the magnetocaloric properties, the magnetic entropy change and refrigerant capacity present competitive values, interesting for cryogenic applications. Finally, the thermal diffusivity values of these compounds are extremely good for practical magnetocaloric refrigeration systems, as they are in the range 1.5–3 mm2/s.

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Section: Magnetocaloric Propertiessupporting

confidence: 80%

Section: B Magnetic Propertiesmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Effect of Nd doping on the crystallographic, magnetic, and magnetocaloric properties of NdxGd3−xCoNi

et al. 2023

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“…According to scaling analysis within the framework or renormalization group theory, several physical parameters for this system undergoing a second order phase transition, can be characterized by certain sets of critical exponents in the region close to the transition (details of the different models are reported in supplementary materials). The critical exponents are obtained through a well stablished and widely used iterative method [54,55]. First the Modified Arrot Plots (MAP), where 𝑀 1/𝛽 is plotted as a function of 𝐻 1/𝛾 , are represented for the main universality classes, for which the classical AP is the particular case corresponding to the Mean Field model.…”

Section: Magnetic Measurements Critical Behavior Analysis and Magneto...mentioning

confidence: 99%

Magnetic transitions with magnetocaloric effects near room temperature related to structural transitions in Y0.9Pr0.1Fe2D3.5 deuteride

Paul‐Boncour

Herrero

Shtender

et al. 2021

Journal of Applied Physics

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The structural and magnetic properties of Y0.9Pr0.1Fe2D3.5 deuteride have been investigated by synchrotron and neutron diffraction, magnetic measurements, and differential scanning calorimetry. Deuterium insertion induces a 23.5 % cell volume increase and a lowering of crystal symmetry compared to the cubic C15 parent compound (Fd-3m SG). The deuteride is monoclinic (P21/c SG) below 330 K and undergoes a first order transition between 330 and 350 K towards a pseudo-cubic structure (R-3m SG) with TO-D = 342(2) K. The compound is ferromagnetic, accompanied by a magnetostrictive effect below TC = 274 K. The analysis of the critical exponents indicates a second order type transition with a deviation from the isotropic 3D Heisenberg model towards the 3D XY model. This implies an easy plane of magnetization in agreement with cell parameter variation showing a planar magnetic orientation. A weak magnetic peak is even observed at the order-disorder transition with a maximum at 343 K. Magnetic entropy variations are characteristic of direct and reverse magnetocaloric effects at TC and TO-D respectively.

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“…R 3 Ni 2 compounds with R = Er and Ho behave as ferromagnets with an additional SR transition at low temperatures. 121 The broad R 3 NiCo series, with solid solution of transition metals, have been analyzed by Herrero et al 122 They present essentially the same features of R 3 Ni 2 compounds, same crystal structure and magnetic behavior without a clear SR transition. The Curie temperature monotonically decreases with increasing atomic number through the lanthanide series, from 97 to 7 K, following an almost exact geometric progression with 1/2 of common ratio.…”

Section: δSmentioning

confidence: 98%

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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Crystallographic, magnetic and magnetocaloric properties in novel intermetallic materials R3CoNi (R = Tb, Dy, Ho, Er, Tm, Lu)

Cited by 20 publications

References 58 publications

Effect of Nd doping on the crystallographic, magnetic, and magnetocaloric properties of NdxGd3−xCoNi

Effect of Nd doping on the crystallographic, magnetic, and magnetocaloric properties of NdxGd3−xCoNi

Magnetic transitions with magnetocaloric effects near room temperature related to structural transitions in Y0.9Pr0.1Fe2D3.5 deuteride

Magnetocaloric materials for hydrogen liquefaction

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