The Neodymium Nickel Silicides Nd42Ni22−xSi31and Nd6Ni2−xSi3

Prots, Yurii; Jeitschko, Wolfgang

doi:10.1006/jssc.1997.7740

Cited by 13 publications

(20 citation statements)

References 24 publications

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“…Based on their data they were also unable to draw a conclusion concerning substitution of silicon due to the similarity in atomic scattering factor of Ni and Si. Similar crystallographic determinations have been obtained for other compounds in the series, e.g., Nd 6 Ni 2 Si 3 (n = 2) [5] and La 15 Ni 7 Si 10 (n = 4) [6], and both of these showed similar Ni-deficiencies. Stoichiometry of the phases has been determined to be Nd 6 Ni 1.66 Si 3 and La 15 Ni 6.62 Si 10 , respectively.…”

Section: Introductionsupporting

confidence: 61%

“…For this compound a refined stoichiometry of La 5 Ni 1.75 Si 3 was determined. Prots and Jeitschko [5] used similar arguments concerning the occupancies of the two partial filled Ni sites. Based on their data they were also unable to draw a conclusion concerning substitution of silicon due to the similarity in atomic scattering factor of Ni and Si.…”

Section: Introductionmentioning

confidence: 93%

“…Crystallographic determination of the structure by Rietveld refinement of powder and single crystal X-ray diffraction data have been reported for this series of compounds in the Nd, Ce, La, and Pr alloy systems [1,5,6]. Pecharsky et al examined Pr 5 Ni 2 Si 3 (n = 3) and concluded that the stoichiometry of these compounds is fixed, Ni-deficient and corresponds to a composition of Pr 5 Ni 1.9 Si 3 .…”

Section: Introductionmentioning

confidence: 96%

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Determination of stoichiometry and site disorder in the complex intermetallics

Huang

Lograsso

et al. 2007

Journal of Alloys and Compounds

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Section: Introductionsupporting

confidence: 61%

Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 96%

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Determination of stoichiometry and site disorder in the complex intermetallics

Huang

Lograsso

et al. 2007

Journal of Alloys and Compounds

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“…The main feature of La 12 Ga 3.26 Sb 24.02 structure is the presence of pseudo-trigonal fragments formed by lanthanum atoms around triangular GaSb 3 planar units (figure, top). This structural units are also an inherent feature of the structure of La 13 Ga 8 Sb 21 [1] and series of hexagonal structures R 6 Ni 2 Si 3 (R = La -S m, Gd) [2][3][4][5][6][7]. Trigonal-prismatic channels formed by La atoms are outlined by corrugated Sb nets interconnected by Ga atoms.…”

Section: Discussionmentioning

confidence: 95%

Crystal structure of lanthanum gallium antimonide, La12Ga3.26Sb24.02

Antonyshyn

Prots

Oryshchyn³

et al. 2010

Zeitschrift Für Kristallographie - New Crystal Structures

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Source of materialThe synthesis was performed from pure elements: lanthanum (Ames, 99.995 wt %), gallium (Chempur, 99.999 wt %) and antimony (Chempur, 99.9999 wt %). Initially La and Ga were arcmelted in the atomic ratio 1:1. The mixture of LaGa precursor with excess of Sb (1:15) was put into glassy carbon crucible, sealed in tantalum container and enclosed in aquartz tube. The following thermal treatment was carried out: heating to 1000°C within 5h ,a nnealing at this temperature for 170 h, cooling to 500°Cwith the rate 4°C/h and subsequent annealing at this temperature for 35 days. The Sb excess was removed by sublimation at 500°Cunder vacuum.

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“…These compounds crystallize with the Ce 6 Ni 1.67 Si 3 aristotype structure [3]. Homologous compounds with nickel instead of cobalt were studied in the past and more recently [3][4][5][6]. To compare the properties of both series with cobalt and nickel, compounds with gadolinium or neodymium as RE were chosen.…”

Section: Introductionmentioning

confidence: 99%

Magnetic structures of the ternary silicide Nd₆Ni_1.67Si₃

Tencé¹,

Gaudin²,

André³

et al. 2010

J. Phys.: Conf. Ser.

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Abstract.The ternary silicides RE6T1.67Si3 (RE = Ce, Pr, Nd, Gd, Tb and T = Co, Ni) crystallizing with the hexagonal Ce 6 Ni 1.67 Si 3 -type structure has been recently extensively studied. It has been shown that some of these compounds exhibit interesting magnetocaloric properties. In this work, the magnetic structures of the Nd6Ni1.67Si3 compound were determined by means of neutron powder diffraction. According to previous magnetization and specific heat measurements, this compound exhibits two successive magnetic transitions at 84K and 38K. The first transition corresponds to a ferromagnetic arrangement of the Nd-moments along the c-axis and the second one to a non-collinear ferromagnetic arrangement yielding a conical structure. The magnetic structures of Nd6Ni1.67Si3 are compared to those of the Nd6Co1.67Si3 homologous ternary silicide. IntroductionRecently, a new series of compounds with the general formula RE 6 Co 1.67 Si 3 (RE = Rare-Earth) was discovered [1,2]. These compounds crystallize with the Ce 6 Ni 1.67 Si 3 aristotype structure [3]. Homologous compounds with nickel instead of cobalt were studied in the past and more recently [3][4][5][6]. To compare the properties of both series with cobalt and nickel, compounds with gadolinium or neodymium as RE were chosen. In the case of Gd 6 M 1.67 Si 3 (M = Co, Ni) compounds, a ferromagnetic behaviour is observed for both silicides around room temperature, with T C = 294K for Gd 6 Co 1.67 Si 3 and 310K for Gd 6 Ni 1.67 Si 3 . They exhibit interesting and similar magnetocaloric properties [6-8] with a same adiabatic temperature change, e.g. ∆T ad = 3.1K for ∆H = 2T [6]. The magnetic properties of Nd 6 Co 1.67 Si 3 and Nd 6 Ni 1.67 Si 3 compounds were also compared and it has been shown that a ferro-or ferrimagnetic transition is observed at 84K for both [9]. Below this magnetic transition a second one was observed at T = 38 and 35K for Nd 6 Ni 1.67 Si 3 and Nd 6 Co 1.67 Si 3 , respectively. The comparison of the temperature dependence of their magnetization M(T) showed significant differences below 40K. To characterize the two magnetic transitions, neutron diffraction experiments were carried out and the results obtained for Nd 6 Ni 1.67 Si 3 will be presented in this paper.

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The Neodymium Nickel Silicides Nd42Ni22−xSi31and Nd6Ni2−xSi3

Cited by 13 publications

References 24 publications

Determination of stoichiometry and site disorder in the complex intermetallics

Determination of stoichiometry and site disorder in the complex intermetallics

Crystal structure of lanthanum gallium antimonide, La12Ga3.26Sb24.02

Magnetic structures of the ternary silicide Nd₆Ni_1.67Si₃

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The Neodymium Nickel Silicides Nd42Ni22−xSi31and Nd6Ni2−xSi3

Cited by 13 publications

References 24 publications

Determination of stoichiometry and site disorder in the complex intermetallics

Determination of stoichiometry and site disorder in the complex intermetallics

Crystal structure of lanthanum gallium antimonide, La12Ga3.26Sb24.02

Magnetic structures of the ternary silicide Nd6Ni1.67Si3

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Magnetic structures of the ternary silicide Nd₆Ni_1.67Si₃