Excellent cryogenic magnetocaloric performances in ferromagnetic Sr2GdNbO6 double perovskite compound

Peng, Xianghe; Ma, Zhenxing; Wang, Pengfei; Wang, Haifeng; Li, Lingwei

doi:10.1016/j.mtphys.2021.100470

Cited by 60 publications

(33 citation statements)

References 40 publications

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“…Recently, a series of works devoted to RE bulk compounds with orthorhombic double perovskite type structure have been published. 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 .…”

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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Section: Discussionmentioning

confidence: 99%

Gadolinium-oxide nanoparticles for cryogenic magnetocaloric applications

Zeleňáková

Hrubovčák

Berkutova

et al. 2022

Sci Rep

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“…The magnitudes of the MC effect have a strong correlation with the corresponding magnetic phase transition (MPT); therefore, the investigation of the MC effects of magnetic materials can provide considerable valuable information for the better understanding of MPT [5][6][7][8][9]. Therefore, many magnetic materials have been synthesized and systematically determined with regard to the magnetic proper-ties, MPT, and MC performances not only to search for suitable candidates for active MR application at cryogenic and near room temperature but also to better understand the MPT of magnetic materials [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25]. However, a large gap still exists at the present stage between the practical MR application requirements and the performances of known MC materials.…”

Section: Introductionmentioning

confidence: 99%

“…In the last several decades, investigations have been performed on the MPT and MC effects in the rare-earth (RE)-based materials in amorphous and crystallized states owing to the large magnetic moments of RE ions, which result in considerable MC effects [18][19][20][21][22][23][24][25]. Law and Franco [13] reviewed the MC performances in RE-based high-entropy alloys.…”

Section: Introductionmentioning

confidence: 99%

“…They observed that Gd 2 ZnMnO 6 exhibited the largest MC effect with the peak value of the isothermal magnetic entropy change (−ΔS M max ) up to 25.2 J kg −1 under a magnetic field change (ΔH) of 0-7 T at around 6.5 K [19]. Xu et al [20] recently reported an MC effect in ferromagnetic Sr 2 GdNbO 6 double-perovskite oxide with the −ΔS M max value of 29.7 J kg −1 K −1 under ΔH of 0-7 T at around 2 K. In recent years, we have fabricated several series of RE-based materials and checked their magnetic properties, MPT, and MC effects in detail; several of these materials exhibited promising MC performances. For instance, large MC effects in a wide temperature range from the liquefaction temperature of H 2 to N 2 have been noted in RE 6 Co 2 Ga compounds [24].…”

Section: Introductionmentioning

confidence: 99%

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Magnetic properties and promising magnetocaloric performances in the antiferromagnetic GdFe2Si2 compound

et al. 2022

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The magnetocaloric (MC) effect-based solidstate magnetic refrigeration (MR) technology has been recognized as an alternative novel method to the presently commercialized gas compression technology. Searching for suitable candidates with promising MC performances is one of the most urgent tasks. Herein, combined experimental and theoretical investigations on the magnetic properties, magnetic phase transition, and cryogenic MC performances of GdFe 2 Si 2 have been performed. An unstable antiferromagnetic (AFM) interaction in the ground state has been confirmed in GdFe 2 Si 2 . Moreover, a huge reversible cryogenic MC effect and promising MC performances in GdFe 2 Si 2 have been observed. The maximum isothermal magnetic entropy change, temperature-averaged entropy change with 2 K lift, and refrigerant capacity for GdFe 2 Si 2 were 30.01 J kg −1 K −1 , 29.37 J kg −1 K −1 , and 328.45 J kg −1 at around 8.6 K with the magnetic change of 0-7 T, respectively. Evidently, the values of these MC parameters for the present AFM compound GdFe 2 Si 2 are superior to those of most recently reported rareearth-based MC materials, suggesting the potential application for active cryogenic MR.

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“…The MCE is a magnetothermodynamic response which manifests the temperature (entropy) change of magnetic solids by applying or removing the magnetic field. Thus, plenty of magnetic solids have been systematically investigated in the last thirty years, and some of them are reported to exhibit large MCEs, such as La(Fe,Si) 13 H x , selected heavy rare earth (RE)-based compounds, MnTMX (TM = Fe, Co, and Ni; X = Ge and Si), as well as NiMn-based Heusler alloys with first-order magnetostructural transitions (MSTs) [9][10][11][12][13][14][15][16][17][18]. However, a large gap between the developing of magnetocaloric materials and the active MC applications still exists at the present stage.…”

Section: Introductionmentioning

confidence: 99%

Enhanced magnetocaloric performances and tunable martensitic transformation in Ni35Co15Mn35−xFexTi15 all-d-metal Heusler alloys by chemical and physical pressures

Qin

Huang

et al. 2021

Sci. China Mater.

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The solid-state magnetic cooling (MC) method based on the magnetocaloric effect (MCE) is recognized as an environmentally friendly and high-energy-efficiency technology. The search or design of suitable magnetic materials with large MCEs is one of the main targets at present. In this work, we apply the chemical and hydrostatic pressures in the Ni 35 Co 15 Mn 35−x Fe x Ti 15 all-d-metal Heusler alloys and systematically investigate their crystal structures, phases, and magnetocaloric performances experimentally and theoretically. All the alloys are found to crystallize in an ordered B2-type structure at room temperature and the atoms of Fe are confirmed to all occupy at sites Mn(B). The total magnetic moments decrease gradually with increasing Fe content and decreasing of volume as well. The martensitic transformation temperature decreases with the increase of Fe content, whereas increases with increasing hydrostatic pressure. Moreover, obviously enhanced magnetocaloric performances can also be obtained by applied pressures. The maximum values of magnetic entropy change and refrigeration capacity are as high as 15.61(24.20) J (kg K) −1 and 109.91(347.26) J kg −1 with ΔH = 20(50) kOe, respectively. These magnetocaloric performances are superior to most of the recently reported famous materials, indicating the potential application for active MC.

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Excellent cryogenic magnetocaloric performances in ferromagnetic Sr2GdNbO6 double perovskite compound

Cited by 60 publications

References 40 publications

Gadolinium-oxide nanoparticles for cryogenic magnetocaloric applications

Gadolinium-oxide nanoparticles for cryogenic magnetocaloric applications

Magnetic properties and promising magnetocaloric performances in the antiferromagnetic GdFe2Si2 compound

Enhanced magnetocaloric performances and tunable martensitic transformation in Ni35Co15Mn35−xFexTi15 all-d-metal Heusler alloys by chemical and physical pressures

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