Low-temperature large magnetocaloric effect in the antiferromagnetic CeSi compound

Wang, L.C.; Dong, Qin; Lu, Jun; Shao, Xinqing; Mo, Zhishen; Xu, Zhi; Sun, J. R.; Hu, Feng; Shen, Baogen

doi:10.1016/j.jallcom.2013.10.183

Cited by 23 publications

(17 citation statements)

References 17 publications

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“…S4(b)). The lithium and potassium 40 thermogravimetric curves are very similar. For 4-NH 4 , the loss of ammonium and hydronium cations seems to be less overlapped with the phosphite groups oxidation than in the other samples, and hence a higher weight loss value is observed in the first stage of the thermal analysis.…”

Section: Structure Discussionmentioning

confidence: 76%

“…For 4-NH 4 , the loss of ammonium and hydronium cations seems to be less overlapped with the phosphite groups oxidation than in the other samples, and hence a higher weight loss value is observed in the first stage of the thermal analysis. Regarding 2-Na, the first weight loss (30)(31)(32)(33)(34)(35)(36)(37)(38)(39)(40)(41)(42)(43)(44)(45) 135ºC) is ascribed to adsorbed water molecules. Such behaviour was previously described for the lithium sample exposed to ambient conditions.…”

Section: Structure Discussionmentioning

confidence: 99%

“…The powder patterns were recorded in the 8238º range (step size = 0.033º and time per step = 0.4 s) at intervals of 15 ºC, increasing the temperature at 10 ºCmin -1 from room temperature to 810 ºC. The IR spectra (KBr pellets) for all compounds were obtained 40 with a Jasco FT/IR-6100 spectrophotometer in the 400-4000 cm -1 range. Diffuse reflectance spectra for all compounds were measured at room temperature using a Varian Cary 5000 spectrophotometer in the 200-2500 nm range.…”

Section: Physicochemical Characterization Techniquesmentioning

confidence: 99%

“…2 However, space filling and structure directing effects of the organic molecules normally are responsible for the enhanced stability of the final organic-framework composites. This fact makes really hard to detemplate successfully by calcination while 40 maintaining the microporosity of the inorganic skeleton and as a direct consequence their thermal stability and applicability are reduced.…”

Section: Introductionmentioning

confidence: 99%

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A_x(H₃O)_2−xMn₅(HPO₃)₆ (A = Li, Na, K and NH₄): open-framework manganese(ii) phosphites templated by mixed cationic species

et al. 2016

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Ax(H3O)2-xMn5(HPO3)6 (A = Li, x = 0.55 (1-Li); A = Na, x = 0.72 (2-Na); A = K, x = 0.30 (3-K); A = NH4, x = 0.59 (4-NH4)) phases were synthesized by employing mild hydrothermal conditions. 1-Li was studied by single crystal X-ray diffraction, while sodium, potassium and ammonium containing analogues were obtained as polycrystalline samples and characterized by powder X-ray diffraction. The four compounds were characterized by ICP-Q-MS, thermal analysis and XPS, IR, UV/Vis and EPR spectroscopy. Single crystal data indicate that 1-Li crystallizes in the P3[combining macron]c1 space group with lattice parameters a = 10.3764(1) Å and c = 9.4017(1) Å with Z = 2. The crystal structure of these phases is constituted by a three-dimensional [Mn(ii)5(HPO3)6](2-) anionic skeleton templated by alkali metal and ammonium cations together with protonated water molecules. Such an inorganic framework is formed by layers of edge-sharing MnO6 octahedra placed in the ab plane and joined along the c direction through phosphite pseudotetrahedra. The sheets display 12-membered ring channels parallel to the c-axis, ca. 5 Å in diameter, where the extraframework species display a strong disorder. EPR measurements point to the existence of short range ferromagnetic interactions around 12 K. Magnetic susceptibility and heat capacity measurements show that all the compounds exhibit long range antiferromagnetic order below circa 4 K, with a significant magnetocaloric effect around the Neel temperature.

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Section: Structure Discussionmentioning

confidence: 76%

Section: Structure Discussionmentioning

confidence: 99%

Section: Physicochemical Characterization Techniquesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A_x(H₃O)_2−xMn₅(HPO₃)₆ (A = Li, Na, K and NH₄): open-framework manganese(ii) phosphites templated by mixed cationic species

et al. 2016

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“…However, so far only a few materials such as GdLiF 4 , GdF 3 and Gd 3 Ga 5 O 12 are used commercially11. As reflected by the increase in exploration of materials which exhibit a large MCE below room temperature10111213, the search for materials which exhibit large magnetocaloric effects over temperature ranges relevant for hydrogen and natural gas liquefaction are also important for exploring potential applications.…”

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confidence: 99%

New insight into magneto-structural phase transitions in layered TbMn2Ge2-based compounds

Fang

Wang

et al. 2017

Sci Rep

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The Tb1−xYxMn2Ge2 series (x = 0, 0.1, 0.2) compounds are found to exhibit two magnetic phase transitions with decreasing temperature: from the paramagnetic state to the antiferromagnetic interlayer state at TNinter and from an antiferromagnetic interlayer structure to a collinear ferrimagnetic interlayer structure at TCinter. Compared with the slight change of TNinter (409 K, 410 K and 417 K for x = 0, 0.1 and 0.2 respectively), the replacement of Y for Tb leads to a significant decrease in TCinter from 97.5 K for x = 0 to 74.6 K for x = 0.2. The variation in TCinter can be ascribed to the combination of two effects: (1) chemical pressure and (2) magnetic dilution effect by Y substitution for Tb. Besides, a strong anisotropic magnet-volume effect has been detected around TCinter in all compounds with Δa/a = 0.125%, 0.124% and 0.130% for x = 0, 0.1 and 0.2, respectively while no obvious effect is detected along the c-axis. The maximum magnetic entropy change were found to be −ΔSmax = 9.1 J kg−1 K−1, 11.9 J kg−1 K−1 and 6.3 J kg−1 K−1 with a field change from 0 T to 5 T for x = 0, 0.1, 0.2 respectively.

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Magnetic properties and magnetocaloric effects of PrSi

Wang

Shen

2014

Rare Met.

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Low-temperature large magnetocaloric effect in the antiferromagnetic CeSi compound

Cited by 23 publications

References 17 publications

A_x(H₃O)_2−xMn₅(HPO₃)₆ (A = Li, Na, K and NH₄): open-framework manganese(ii) phosphites templated by mixed cationic species

A_x(H₃O)_2−xMn₅(HPO₃)₆ (A = Li, Na, K and NH₄): open-framework manganese(ii) phosphites templated by mixed cationic species

New insight into magneto-structural phase transitions in layered TbMn2Ge2-based compounds

Magnetic properties and magnetocaloric effects of PrSi

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Low-temperature large magnetocaloric effect in the antiferromagnetic CeSi compound

Cited by 23 publications

References 17 publications

Ax(H3O)2−xMn5(HPO3)6 (A = Li, Na, K and NH4): open-framework manganese(ii) phosphites templated by mixed cationic species

Ax(H3O)2−xMn5(HPO3)6 (A = Li, Na, K and NH4): open-framework manganese(ii) phosphites templated by mixed cationic species

New insight into magneto-structural phase transitions in layered TbMn2Ge2-based compounds

Magnetic properties and magnetocaloric effects of PrSi

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Product

Resources

About

A_x(H₃O)_2−xMn₅(HPO₃)₆ (A = Li, Na, K and NH₄): open-framework manganese(ii) phosphites templated by mixed cationic species

A_x(H₃O)_2−xMn₅(HPO₃)₆ (A = Li, Na, K and NH₄): open-framework manganese(ii) phosphites templated by mixed cationic species