Phase relationships at 600°C of the Yb–Pd–Sn system from 25 to 100at.% Yb

Giovannini, M.; Pasero, R.; Saccone, A.

doi:10.1016/j.intermet.2009.09.002

Cited by 18 publications

(14 citation statements)

References 27 publications

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“…[9] In the Pearson database, [10] numerouso rthorhombic compounds with the general composition RTX 2 can be found. Due to the differences in the respective bonding situations, however,t hese compounds have to be considered isopointalr ather than isotypic.F or these 1-1-2r epresentatives the gallides( MTGa 2 ; M = Ca, Sc, Y, Gd-Lu; T = Ni, Pd, Pt, Au), [11][12][13][14][15][16][17][18][19] the indides (MTIn 2 ; M = Na,C a-Ba, Y, La-Nd, Eu-Dy,Y b; T = Ru, Rh, Ir,N i, Pd, Pt, Cu, Au [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38] and Eu 1Àx Sr x PtIn 2 ), [39] the thallides (MTTl 2 ; M = Sr,E u; T = Pd, Pt), [40][41][42] the silicide ScPt 2 Si, [43] the stannides MTSn 2 (M = Ca, Eu, Yb; T = Rh, Ir,P d) [43][44][45][46][47][48] and the phosphide PdNi 2 P [44] have been reported. For aluminum finally, the representatives MTAl 2 (M = Sc, Y, La-Nd, Sm, Gd-Lu; T = Co, Ni, Cu, Pd, Pt) [49]…”

Section: Introductionmentioning

confidence: 99%

From 3D to 2D: Structural, Spectroscopic and Theoretical Investigations of the Dimensionality Reduction in the [PtAl₂]^δ− Polyanions of the Isotypic MPtAl₂ Series (M=Ca–Ba, Eu)

Stegemann

Block

Klenner

et al. 2019

Chemistry A European J

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Four new MPtAl2 (M=Ca, Sr, Ba, Eu) compounds, adopting the orthorhombic MgCuAl2‐type structure, have been synthesized from the elements using tantalum ampoules. All compounds are obtained as platelet‐shaped crystallites and exhibit an increasing moisture sensitivity with increasing size of the formal M cation. Structural investigations indicate a pronounced elongation of the crystallographic b‐axis, which results in a significant distortion of the [PtAl2]δ− polyanion. Within the polyanion, layer‐like arrangements can be found with bonding Pt−Al interactions within the slab; the increase of the b‐axis can be attributed to increasing Al−Al distances and therefore decreasing interactions between the slabs, caused by the differently‐sized formal M cations. While the alkaline earth (M=Ca, Sr) representatives exhibit Pauli paramagnetism, BaPtAl2 shows diamagnetic behavior, finally EuPtAl2 is ferromagnetic with TC=54.0(5) K. The effective magnetic moment indicates that the Eu atoms are in a divalent oxidation state, which is confirmed by 151Eu Mössbauer spectroscopic investigations. Measurements below the Curie‐temperature show a full magnetic hyperfine field splitting with Bhf=21.7(1) T. 27Al and 195Pt magic‐angle spinning NMR spectroscopy corroborates the presence of single crystallographic sites for the Pt and Al atoms. The large 27Al nuclear electric quadrupolar coupling constants confirm unusually strong electric field gradients, in agreement with the structural distortions and the respective theoretical calculations. X‐ray photoelectron spectroscopy has been utilized to investigate the charge transfer within the polyanion. The Pt 4f binding energy decreases with decreasing electronegativity / ionization energy of the alkaline earth elements, suggesting an increasing electron density at the Pt atoms. Theoretical investigations underline the platinide character of the investigated compounds by Bader charge calculations. The analysis of the integrated crystal orbital Hamilton population (ICOHP) values, electron localization function (ELF) and isosurface analyses lead to a consistent structural picture, indicating stable layer‐like arrangements of the [PtAl2]δ− polyanion.

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Section: Introductionmentioning

confidence: 99%

From 3D to 2D: Structural, Spectroscopic and Theoretical Investigations of the Dimensionality Reduction in the [PtAl₂]^δ− Polyanions of the Isotypic MPtAl₂ Series (M=Ca–Ba, Eu)

Stegemann

Block

Klenner

et al. 2019

Chemistry A European J

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“…Among the various intermetallic compounds present in this system, the crystal structure of Yb 3 Pd 2 Sn 2 was determined ab initio and YbPdSn 2 was confirmed to crystallize in the MgCuAl 2 -type [5,6]. In a systematic search for new ternary compounds in the analogous Eu-Pd-Sn system, we have discovered the compounds Eu 3 Pd 2 Sn 2 , EuPdSn 2 , and EuPd 2 Sn 4 .…”

Section: Introductionmentioning

confidence: 95%

“…• C of the Yb-Pd-Sn system was studied [5]. Among the various intermetallic compounds present in this system, the crystal structure of Yb 3 Pd 2 Sn 2 was determined ab initio and YbPdSn 2 was confirmed to crystallize in the MgCuAl 2 -type [5,6].…”

Section: Introductionmentioning

confidence: 99%

Crystal Structure and Magnetic Properties of new Eu-Pd-Sn Compounds

et al. 2017

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“…The former is hexagonal with the lattice parameters a h =7.590 Å and c h =3.770 Å [10]. The latter is tetragonal; a t =7.589 Å and c t =3.635 Å [8]. Both are layered structures with atoms located at z=0 and 1/2, and stacked along their respective c-axes with period agreeing to within 4%.…”

Section: Structural Properties Of α-Ybpdsn and Yb 2 Pd 2 Snmentioning

confidence: 99%

Interpretation of some Yb-based valence-fluctuating crystals as approximants to a dodecagonal quasicrystal

Ishimasa

Mihalkovič

Deguchi

et al. 2018

Philosophical Magazine

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The hexagonal ZrNiAl-type (space group: P ! 6 2m) and the tetragonal Mo 2 FeB 2 -type (space group: P4/mbm) structures, which are frequently formed in the same Yb-based alloys and exhibit physical properties related to valence-fluctuation, can be regarded as approximants of a hypothetical dodecagonal quasicrystal. Using Pd-Sn-Yb system as an example, a model of quasicrystal structure has been constructed, of which 5-dimensional crystal (space group: P12/mmm, a DD =5.66 Å and c=3.72 Å) consists of four types of acceptance regions located at the following crystallographic sites; Yb [00000], Pd[1/3 0 1/3 0 1/2], Pd[1/3 1/3 1/3 1/3 0]and Sn[1/2 00 1/2 1/2]. In the 3-dimensional space, the quasicrystal is composed of three types of columns, of which c-projections correspond to a square, an equilateral triangle and a 3-fold hexagon. They are fragments of two known crystals, the hexagonal α-YbPdSn and the tetragonal Yb 2 Pd 2 Sn structures. The model of the hypothetical quasicrystal may be applicable as a platform to treat in a unified manner the heavy fermion properties in the two types of Yb-based crystals. ! 6 2m) and the other tetragonal Mo 2 FeB 2 -type (space group: P4/mbm) structures. Such Yb-based crystals have been studied intensively for the last decade from the viewpoint of valence-fluctuation, and competition between the Kondo effect and the Ruderman-Kittel-Kasuya-Yosida interaction. The former, Kondo effect, favors a nonmagnetic ground state, and the latter magnetic ordered state. Competition of the two effects gives rise to intriguing phenomena such as heavy fermions, non-fermi liquid and quantum criticality. In the alloy system of Yb-Pd-Sn, both types of structures are formed [8,9]. The hexagonal α-YbPdSn belonging to ZrNiAl-type is formed as a low-temperature phase

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Phase relationships at 600°C of the Yb–Pd–Sn system from 25 to 100at.% Yb

Cited by 18 publications

References 27 publications

From 3D to 2D: Structural, Spectroscopic and Theoretical Investigations of the Dimensionality Reduction in the [PtAl₂]^δ− Polyanions of the Isotypic MPtAl₂ Series (M=Ca–Ba, Eu)

From 3D to 2D: Structural, Spectroscopic and Theoretical Investigations of the Dimensionality Reduction in the [PtAl₂]^δ− Polyanions of the Isotypic MPtAl₂ Series (M=Ca–Ba, Eu)

Crystal Structure and Magnetic Properties of new Eu-Pd-Sn Compounds

Interpretation of some Yb-based valence-fluctuating crystals as approximants to a dodecagonal quasicrystal

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Phase relationships at 600°C of the Yb–Pd–Sn system from 25 to 100at.% Yb

Cited by 18 publications

References 27 publications

From 3D to 2D: Structural, Spectroscopic and Theoretical Investigations of the Dimensionality Reduction in the [PtAl2]δ− Polyanions of the Isotypic MPtAl2 Series (M=Ca–Ba, Eu)

From 3D to 2D: Structural, Spectroscopic and Theoretical Investigations of the Dimensionality Reduction in the [PtAl2]δ− Polyanions of the Isotypic MPtAl2 Series (M=Ca–Ba, Eu)

Crystal Structure and Magnetic Properties of new Eu-Pd-Sn Compounds

Interpretation of some Yb-based valence-fluctuating crystals as approximants to a dodecagonal quasicrystal

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From 3D to 2D: Structural, Spectroscopic and Theoretical Investigations of the Dimensionality Reduction in the [PtAl₂]^δ− Polyanions of the Isotypic MPtAl₂ Series (M=Ca–Ba, Eu)

From 3D to 2D: Structural, Spectroscopic and Theoretical Investigations of the Dimensionality Reduction in the [PtAl₂]^δ− Polyanions of the Isotypic MPtAl₂ Series (M=Ca–Ba, Eu)