Influence of Al substitution on magnetocaloric effect of Pr2Fe17−xAlx

Guetari, R.; Bez, R.; Belhadj, Ahmed; Zehani, K.; Bezergheanu, A.; Mliki, N.; Bessaïs, L.; Cizmas, C.B.

doi:10.1016/j.jallcom.2013.10.184

Cited by 44 publications

(6 citation statements)

References 37 publications

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“…The 2f-Pr(1) distance is slightly shorter than bonds in Pr metal (3.65 Å) but larger than the 3.23 Å Pr–Pr distances found in the Laves phase PrFe 2 . Pr–Fe bonds on the order of 3.3 Å have been measured in Pr 2 Fe 17 ; the iron atom involved in this long bond is a corner-shared capping atom . The majority of Pr–Fe bonds in the Pr 2 Fe 17 are closer to 3.1 Å, as is the 3.09 Å distance between Pr and Fe atoms in PrFe 2 .…”

Section: Resultsmentioning

confidence: 82%

“…21 Pr−Fe bonds on the order of 3.3 Å have been measured in Pr 2 Fe 17 ; the iron atom involved in this long bond is a corner-shared capping atom. 22 The majority of Pr−Fe bonds in the Pr 2 Fe 17 are closer to 3.1 Å, as is the 3.09 Å distance between Pr and Fe atoms in PrFe 2 . 21 Pr−Si bonds range from the order of 3.0 Å in PrFeSi 23 to about 3.2 Å in Pnma PrSi.…”

Section: ■ Results and Discussionmentioning

confidence: 97%

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Pr₆₂Fe₂₁M₁₆C₃₂ Versus Pr₂₁Fe₈M₇^′C₁₂ (M = Si, P; M′ = Si, Ge, Sn): Competing Intermetallic Carbides Grown from a Pr/Ni Flux

Engstrand

Latturner

2018

Inorg. Chem.

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Reactions of silicon, carbon, and iron in a low-melting flux mixture of praseodymium and nickel produced two competing intermetallic compounds. Pr62Fe21Si16C32 has a new structure type in tetragonal space group P4/mmm (a = 15.584(2) Å, c = 11.330(1) Å, Z = 1) that features trigonal planar FeC3 units that share corners to form a framework of cylindrical channels encompassing a network of silicon-centered praseodymium clusters. Slight variation of reactant ratio and heating profile produced Pr21Fe8Si7C12 instead; this compound has the previously reported cubic La21Fe8Sn7C12 structure type. Identical Pr/Si clusters and FeC3 subunit motifs are found in both structure types. In addition to reactant ratio and heating profile, size effects play a role in determining which structure forms. Replacing silicon with smaller phosphorus atoms produces only the tetragonal structure; replacement with larger elements (M = Ge, Sn) yields only cubic Pr21Fe8M7C12. Magnetic susceptibility measurements on single crystals of Pr62Fe21Si16C32 indicate antiferromagnetic ordering of the Pr moments below 17 K and no magnetic moment on iron atoms. The behavior of Pr21Fe8Si7C12 is more complex, revealing magnetic contributions from both Pr and Fe atoms and possible spin frustration.

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Section: Resultsmentioning

confidence: 82%

Section: ■ Results and Discussionmentioning

confidence: 97%

Pr₆₂Fe₂₁M₁₆C₃₂ Versus Pr₂₁Fe₈M₇^′C₁₂ (M = Si, P; M′ = Si, Ge, Sn): Competing Intermetallic Carbides Grown from a Pr/Ni Flux

Engstrand

Latturner

2018

Inorg. Chem.

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“…Recent [20][21][22][23][24][25]. The selected ferromagnetic compound Gd 2 Fe 17 studied in this research has a magnetocaloric effect with a maximum magnetic entropy ∆S Max equal to 0.89 J/kg K, for an external field change from 0 T to 1.5 T at room temperature [24].…”

Section: Introductionmentioning

confidence: 99%

Effect of M Substitution on Structural, Magnetic and Magnetocaloric Properties of R₂Fe_17-x M_x (R = Gd, Nd; M = Co, Cu) Solid Solutions

Jemmali¹,

Bessaïs²

2021

Magnetic Skyrmions

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The structure, magnetic and magnetocaloric properties of Nd2Fe17−xCox (x = 0; 1; 2; 3, 4) and Gd2Fe17-xCux (x = 0, 0.5, 1 and 1.5) solid solutions have been studied. For this purpose, these samples were prepared by arc melting and subsequent annealing at 1073 K for a 7 days. Structural analysis by Rietveld method on X-ray diffraction (XRD) have determined that these alloys crystallize in the rhombohedral Th2Zn17-type structure (Space group R¯3 m) and the substitution of iron by nickel and copper leads to a decrease in the unit cell volume. The Curie temperature (TC) of the prepared samples depends on the nickel and copper content. Based on the Arrott plot, these analyses show that Nd2Fe17-xCox exhibits a second-order ferromagnetic to paramagnetic phase transition around the Curie temperature. These curves were also used to determine the magnetic entropy change ∆SMax and the relative cooling power. For an applied field of 1.5 T, ∆SMax increase from 3.35 J/kg. K for x = 0 to 5.83 J/kg. K for x = 2. In addition the RCP increases monotonously. This is due to an important temperature range for the magnetic phase transition, contributing to a large ∆SMax shape. Gd2Fe17-xCux solid solution has a reduction of the ferromagnetic phase transition temperature from 475 K (for x = 0) to 460 K (for x = 1.5) is due to the substitution of the magnetic element (Fe) by non-magnetic atoms (Cu). The magnetocaloric effect was determined in the vicinity of the Curie temperature TC. By increasing the Cu content, an increase in the values of magnetic entropy (∆SMax) in a low applied field is observed.

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“…Intermetallic materials combining rare-earth elements are attractive alloys due to their good magnetic and magnetocaloric properties [1][2][3][4][5][6][7][8][9]. A systematic study on constitutional properties of compounds formed by Sm, Fe and Ni has been determined in our team, phase equilibria analyses have been performed, and ternary phase diagram of the Fe-Ni-Sm system at T = 800 °C has been derived [10].…”

Section: Introductionmentioning

confidence: 99%

Magnetocaloric Effect in SmNi2 Compound

et al. 2019

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The structure and magnetocaloric properties of SmNi 2 intermetallic material has been studied by X-ray diffraction and magnetic measurements. Rietveld refinements and energy dispersive X-ray spectroscopy detector show that the SmNi 2 intermetallic is single phase. This intermetallic adopts the MgCu 2 structure type of cubic Laves phase (space group Fd3m) and stabilizes without vacancy in Sm site. The magnetic properties and the entropy change have been investigated by the magnetic measurements. The compound obeys to the second-order magnetic phase transition. The Curie temperature of SmNi 2 is determined by the minima of dM/dT. The magnetocaloric effect has been estimated using two different approaches, the thermodynamic Maxwell's relation and the Landau theory. These studies are discussed in terms of magnetocaloric effect (MCE). The maximum value of the magnetic entropy (ΔS M) is equal to 1.82 J/kg K and the relative cooling power for SmNi 2 is equal to 23.5 J/kg. Besides, the MCE analysis proves a contribution of the magnetoelastic coupling to the entropy change.

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Influence of Al substitution on magnetocaloric effect of Pr2Fe17−xAlx

Cited by 44 publications

References 37 publications

Pr₆₂Fe₂₁M₁₆C₃₂ Versus Pr₂₁Fe₈M₇^′C₁₂ (M = Si, P; M′ = Si, Ge, Sn): Competing Intermetallic Carbides Grown from a Pr/Ni Flux

Pr₆₂Fe₂₁M₁₆C₃₂ Versus Pr₂₁Fe₈M₇^′C₁₂ (M = Si, P; M′ = Si, Ge, Sn): Competing Intermetallic Carbides Grown from a Pr/Ni Flux

Effect of M Substitution on Structural, Magnetic and Magnetocaloric Properties of R₂Fe_17-x M_x (R = Gd, Nd; M = Co, Cu) Solid Solutions

Magnetocaloric Effect in SmNi2 Compound

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Influence of Al substitution on magnetocaloric effect of Pr2Fe17−xAlx

Cited by 44 publications

References 37 publications

Pr62Fe21M16C32 Versus Pr21Fe8M7′C12 (M = Si, P; M′ = Si, Ge, Sn): Competing Intermetallic Carbides Grown from a Pr/Ni Flux

Pr62Fe21M16C32 Versus Pr21Fe8M7′C12 (M = Si, P; M′ = Si, Ge, Sn): Competing Intermetallic Carbides Grown from a Pr/Ni Flux

Effect of M Substitution on Structural, Magnetic and Magnetocaloric Properties of R2Fe17-x Mx (R = Gd, Nd; M = Co, Cu) Solid Solutions

Magnetocaloric Effect in SmNi2 Compound

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Pr₆₂Fe₂₁M₁₆C₃₂ Versus Pr₂₁Fe₈M₇^′C₁₂ (M = Si, P; M′ = Si, Ge, Sn): Competing Intermetallic Carbides Grown from a Pr/Ni Flux

Pr₆₂Fe₂₁M₁₆C₃₂ Versus Pr₂₁Fe₈M₇^′C₁₂ (M = Si, P; M′ = Si, Ge, Sn): Competing Intermetallic Carbides Grown from a Pr/Ni Flux

Effect of M Substitution on Structural, Magnetic and Magnetocaloric Properties of R₂Fe_17-x M_x (R = Gd, Nd; M = Co, Cu) Solid Solutions