Magnetocaloric effect at cryogenic temperature in gadolinium oxide nanotubes

Paul, Rima; Paramanik, Tapas; Das, Kalipada; Sen, Pintu; Satpati, Biswarup; Das, I.

doi:10.1016/j.jmmm.2016.05.057

Cited by 40 publications

(12 citation statements)

References 31 publications

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“…This value is more than double that of hexagonal Gd (and its heteroelement solutions), in the middle of the range attained for Laves phases, intermetallics and alloys, [1] comparable to that of Gd 2 O 3 nanotubes. [23] On the other hand, this value is low with respect to that of other magnetocaloric MNMs, [10,24] a natural consequence of the relatively large L ligands and NTf 2 À counteranions. Beyond this proof-of-principle example, this value can be optimized by properly tailoring the ligands and counterions, so that the same magnetocaloric potential is achieved at a smaller mass/volume.…”

Section: Discussionmentioning

confidence: 97%

A Magnetocaloric Glass from an Ionic‐Liquid Gadolinium Complex

et al. 2022

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Gd 5 (L) 16 (H 2 O) 8 ](Tf 2 N) 15 was obtained from reaction of Gd 2 O 3 with 1-carboxymethyl-3-ethylimidazolium chloride (LHCl). The material was found to be an ionic liquid that freezes to glassy state on cooling to À 30 °C. Variable-temperature magnetic studies reveal the presence of weak magnetic intramolecular interactions in the glass. Isothermal variable-field magnetization demonstrates a magnetocaloric effect (MCE), which is the first finding of such an effect in a molecular glass. This MCE is explainable by an uncoupled representation, with a magnetic entropy change of À 11.36 J K À 1 kg À 1 at 1.8 K for a 0-7 T magnetic field change, and with a refrigerant capacity of 125.9 J kg À 1 , in the 1.8-50 K interval.

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Section: Discussionmentioning

confidence: 97%

A Magnetocaloric Glass from an Ionic‐Liquid Gadolinium Complex

et al. 2022

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“…Regarding magnetocaloric properties, the most perspective of them appear those containing gadolinium atoms Gd 2 ZnMnO 6 26 , Gd 2 FeAlO 6 27 and Sr 2 GdNbO 6 28 with the largest − ΔS M ~ 26 J Kg −1 K −1 determined for the latter compound. From nanoscaled structures, it is worth to mention Eu doped Gd 2 O 3 nanorods 29 that exhibit enhancened MCE when compared with the pure Gd 2 O 3 nanotubes 30 . Here, the promotion of magnetic entropy change up to 20 J Kg −1 K −1 has been ascribed to the surface spin disorder.…”

Section: Discussionmentioning

confidence: 99%

Gadolinium-oxide nanoparticles for cryogenic magnetocaloric applications

Zeleňáková

Hrubovčák

Berkutova

et al. 2022

Sci Rep

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The series of advanced nanocomposites consisting of Gd2O3 nanoparticles (NPs) embedded into periodic porous SiO2 matrix have been investigated with respect to their structural and magnetocaloric properties. By means of small angle neutron scattering and transmission electron microscopy, regular nanopores organized in the cubic or hexagonal superlattice have been documented. The pores are occupied by the NPs of progressive concentration within the nanocomposite series. All of the examined systems have exhibited extraordinarily high values of magnetic entropy change (up to 70 J kg−1 K−1) at low temperatures with the absence of thermal hysteresis, indicating their perspective utilization in cryogenic refrigeration. Profound analysis of magnetic entropy change data via scaling laws has been applied to the nanocomposite materials for the very first time. With the aid of scaling analysis, conclusions on magnetic properties and phase transition type have been made, even for the conditions unavailable in the laboratory.

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“…In the spin-1 2 frustrated three-leg-ladder Heisenberg antiferromagnets Cu 3 (OH) 4 AO 4 (A = S or Se), the Cu moments within the two outer legs are ordered, whereas the Cu moments within the inner leg remain random [42,43]. In the spin- 1 2 frustrated quasi-onedimensional antiferromagnet Cu 3 Mo 2 O 9 , the Cu moments within the dimers are ordered, whereas the Cu moments within the chains remain random [44] b: Ho 2 O 3 [30], c: Er 6 WO 12 [31], d: Ho 6 WO 12 [31], e: Dy 6 WO 12 [31], f: Gd 2 O 3 [32], g: Sr 2 DyNbO 6 [33], h: Tm 6 MoO 12 [31], i: Sr 2 YRuO 6 [33], j: Sr 2 DyRuO 6 [33], k: Sr 2 TbRuO 6 [33], l: Er 2 Mn 2 O 7 [34], A: TbMnO 3 (H//a) [35], B: GdTiO 3 (H//c) [36], C: YbTiO 3 (H//c) [37], D: ErTiO 3 (H//c) [37], E: HoTiO 3 (H//c) [38], F: DyTiO 3 (H//c) [39], G: TmTiO 3 (H//c) [40]. Lowercase and uppercase letters indicate the data for powders and single crystals, respectively.…”

Section: B Origin Of the Partially Disordered Statementioning

confidence: 99%

Magnetic structure of Tb3RuO7 possessing alternating-bond spin-3/2 Ru chains in a nonuniform internal magnetic field: appearance of a partially disordered state

Hase,

Dönni,

Pomjakushin

2021

Preprint

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We report on the magnetic structures of Tb 3 RuO 7 and Nd 3 RuO 7 determined from powder neutron-diffraction experiments. In Tb 3 RuO 7 , alternating-bond spin-3 2 Ru1-Ru2 chains are formed. The Ru1 and Ru2 moments are ordered and disordered (paramagnetic), respectively, below 15 K. This result indicates the appearance of a partially disordered (PD) state, although the two Ru sites are very similar to each other. In Nd 3 RuO 7 , the Ru1 and Ru2 ions form independent uniform chains. Both the Ru1 and Ru2 moments are ordered below 17.5 K. Probably, the main source of the PD state in Tb 3 RuO 7 is the magnetic frustration in the exchange interactions. The internal magnetic field generated by the Tb ordered moments at the Ru1 sites is different from that at the Ru2 sites. We speculate that the different (nonuniform) internal magnetic field enhances the difference in the properties between the Ru1 and Ru2 moments. We also report on the magnetic entropy changes of Tb 3 RuO 7 and Gd 3 RuO 7 .

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Magnetocaloric effect at cryogenic temperature in gadolinium oxide nanotubes

Cited by 40 publications

References 31 publications

A Magnetocaloric Glass from an Ionic‐Liquid Gadolinium Complex

A Magnetocaloric Glass from an Ionic‐Liquid Gadolinium Complex

Gadolinium-oxide nanoparticles for cryogenic magnetocaloric applications

Magnetic structure of Tb3RuO7 possessing alternating-bond spin-3/2 Ru chains in a nonuniform internal magnetic field: appearance of a partially disordered state

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