Magnetic properties and structures of equiatomic rare earth-platinum compounds RPt (R = Gd, Tb, Dy, Ho, Er, Tm)

Castets, A.; Gignoux, D.; Gómez-Sal, J.C.

doi:10.1016/0022-4596(80)90021-3

Cited by 28 publications

(10 citation statements)

References 10 publications

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“…A further complication is that the isotropic exchange constants for all nearest neighbors are required as well to determine the spin-flip transition at T SF ∼ 0.96 T N and H = 0 (Ref. 21) The power of this theoretical construct would be valuable to extend to other FeB-structured Gd-based intermetallic compounds, ranging from the ferromagnets GdPt 22 and Gd(Ni 0.7 Cu 0.3 ) 23 to the helimagnets Gd(Ni 0.4 Cu 0.6 ) with a wave vector (0, 0, 1 4 ) 23 and GdCu with a wave vector (0, 1 4 , 1 4 ).…”

Section: Results: H-t Phase Diagrams and Spin Structuresmentioning

confidence: 99%

Evolution of incommensurate spin order with magnetic field and temperature in the itinerant antiferromagnet GdSi

et al. 2013

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GdSi exhibits spin-density-wave (SDW) order arising from the cooperative interplay of sizeable local moments and a partially nested Fermi sea of itinerant electrons. Using magnetotransport, magnetization, and nonresonant magnetic x-ray diffraction techniques, we determine the H-T phase diagrams of GdSi for magnetic fields up to 21 T, where antiferromagnetic order is no longer stable, and field directions along each of the three major crystal axes. While the incommensurate magnetic ordering vector that characterizes the SDW is robust under magnetic field, the multiple spin structures of this compound are highly flexible and rotate relative to the applied field via either canting or spin-flop processes. The antiferromagnetic spin densities always arrange themselves transverse to the applied magnetic field direction. The phase diagrams are delineated by two types of phase boundaries: one separates a collinear from a planar spin structure associated with a lattice structural transition, and the other defines a spin flop transition that is only weakly temperature dependent. The major features of the phase diagrams along each of the crystal axes can be explained by the combination of local moment and global Fermi surface physics at play.

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Section: Results: H-t Phase Diagrams and Spin Structuresmentioning

confidence: 99%

Evolution of incommensurate spin order with magnetic field and temperature in the itinerant antiferromagnet GdSi

et al. 2013

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“…To revisit this problem, DyPd and ErPd were newly synthesized by arc melting, and they were indeed confirmed by their powder XRD patterns to exhibit poor crystallinity, making Rietveld refinements difficult to perform (Figure a,b). Instead, through Le Bail fitting, the lattice parameters could be refined based on an orthorhombic cell [ a = 6.922(2) Å, b = 4.5502(9) Å, c = 5.534(1) Å for DyPd; a = 6.8427(7) Å, b = 4.4927(4) Å, c = 5.4966(4) Å for ErPd] and were found to be similar to those of the Pt analogues adopting FeB-type structures ( a = 6.969 Å, b = 4.481 Å, c = 5.544 Å for DyPt; a = 6.906 Å, b = 4.451 Å, and c = 5.509 Å for ErPt). , The difference plots indicate that the fitting to the FeB-type model is not perfect. A more detailed investigation, perhaps through pair distribution function analysis with synchrotron radiation, may reveal further information about the local structure but is beyond the scope of the present study.…”

Section: Resultsmentioning

confidence: 99%

“…53 They were tentatively assigned as having the FeB-type structure, but neither experimental powder X-ray diffraction (XRD) patterns nor cell parameters were provided. To revisit this problem, DyPd and ErPd were newly synthesized by arc melting, and they were indeed confirmed by their powder XRD patterns to exhibit poor crystallinity, making Rietveld refinements difficult to perform (Figure 6a 56,57 The difference plots indicate that the fitting to the FeB-type model is not perfect. A more detailed investigation, perhaps through pair distribution function analysis with synchrotron radiation, may reveal further information about the local structure but is beyond the scope of the present study.…”

Section: Structural Instabilities At Boundarymentioning

confidence: 99%

Revealing Hidden Patterns through Chemical Intuition and Interpretable Machine Learning: A Case Study of Binary Rare-Earth Intermetallics RX

et al. 2023

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Machine learning algorithms have been applied successfully in many areas of materials chemistry but often suffer from an inability to extract chemical insight. To demonstrate that an approach combining machine learning and chemical intuition can be effective in generating interpretable models, the structures of binary equiatomic rare-earth intermetallics RX, whose relationships have long defied understanding, were investigated as a case study. A structure map was developed based on only two parameters, which are derived from simple elemental descriptors (atomic number, period and group numbers, radii, and electronegativity) of the R and X components. This map reveals the previously hidden patterns of structural regularities of RX intermetallics. It explains the preference for CsCl-, TlI-, or FeB-type structures among these compounds, predicts the structures of missing members, rationalizes the occurrence of metastable phases and polymorphic transformations, and offers strategies for structure stabilization through the addition of a third component.

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“…Thus, ones proposed it to be a high temperature phase or a metastable phase at low temperature [6,7]. Furthermore, nine binary compounds, Pt 5 Tb (Pt 5 Sm structure type), Pt 3 Tb (AuCu 3 structure type), Pt 2 Tb (MgCu 2 structure type), Pt 4 Tb 3 (Pd 4 Pu 3 structure type), PtTb (BFe structure type), Pt 4 Tb 5 (Pu 5 Rh 4 structure type), Pt 3 Tb 5 (Mn 5 Si 3 structure type), PtTb 2 (Co 2 Si structure type) and PtTb 3 (CFe 3 structure type) have been reported in the Pt-Tb binary system [3,[8][9][10][11][12][13][14][15][16]. Crystallographic data for these binary compounds of the Co-Tb and Pt-Tb systems are collected in Table 1.…”

Section: Introductionmentioning

confidence: 99%

Solid-state phase equilibria in the Co–Pt–Tb ternary system at 1173K

Fuqiang¹,

Zhengfei²,

Gang³

et al. 2010

Journal of Alloys and Compounds

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a b s t r a c tThe solid-state phase equilibria in the Co-Pt-Tb ternary system at 1173 K (Tb ≤ 70%) were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersion spectroscopy (EDS) techniques. The 1173 K isothermal section consists of 14 single-phase regions, 25 two-phase regions and 12 three-phase regions. At 1173 K, we have observed that the maximum solubility of Tb in ␣-(Co, Pt) is below 1.5 at.%Tb, with the maximum solid solubility of Pt in the compounds Co 17 Tb 2 , Co 7 Tb 2 , Co 3 Tb and Co 2 Tb being below 1 at.%Pt, 2 at.%Pt, 3.5 at.%Pt and 2 at.%Pt, respectively. Furthermore, the maximum solid solubility of Co in the compounds Pt 5 Tb, Pt 3 Tb, Pt 4 Tb 3 , PtTb, Pt 4 Tb 5 , Pt 3 Tb 5 , PtTb 2 and PtTb 3 is below 1 at.%Co, whereas in Pt 2 Tb it reaches 17 at.%Co. With the introduction of Co, the Pt 4 Tb 3 phase gradually decomposes into the two neighboring compounds PtTb and Pt 2 Tb, while with the Co content exceeded 9 at.%Co, the Pt 4 Tb 3 phase disappears. No new ternary compounds or Co 5 Tb were observed in our study.

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Magnetic properties and structures of equiatomic rare earth-platinum compounds RPt (R = Gd, Tb, Dy, Ho, Er, Tm)

Cited by 28 publications

References 10 publications

Evolution of incommensurate spin order with magnetic field and temperature in the itinerant antiferromagnet GdSi

Evolution of incommensurate spin order with magnetic field and temperature in the itinerant antiferromagnet GdSi

Revealing Hidden Patterns through Chemical Intuition and Interpretable Machine Learning: A Case Study of Binary Rare-Earth Intermetallics RX

Solid-state phase equilibria in the Co–Pt–Tb ternary system at 1173K

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