Ce2Co3Si5 and R2Ni3Si5 (R ≡ Ce, Dy, Y) with the orthorhombic U2Co3Si5-type structure and the structural relationship with the tetragonaL Sc2Fe3Si5-type structure

Chabot, B.; Parthé, E.

doi:10.1016/0022-5088(84)90034-1

Cited by 56 publications

(32 citation statements)

References 5 publications

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“…3,5,6 These compounds crystallize in orthorhombic U 2 Co 3 Si 5 -type structure ͑space group Ibam͒. 6 The compounds Pr 2 Ni 3 Si 5 , Dy 2 Ni 3 Si 5 , and, Ho 2 Ni 3 Si 5 order antiferromagnetically with T N ϭ 8.5 K, 9.5 K and 6 K, respectively. High temperature susceptibility follows a Curie-Weiss ͑CW͒ behavior, with a magnetic moment close to the respective free trivalent R moment.…”

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confidence: 99%

“…7͒ also which is yet to be understood. Keeping this in view and considering that the structure of R 2 Ni 3 Si 5 has RNi 2 Si 2 as a building block ͑with RNiSi 3 as the other building block͒, 6 it is conceivable that the linear term may arise from RM 2 X 2 blocks. This linear component of MR cannot originate from the contribution of the localized moment in the paramagnetic state as MR of such a system is negative and is also usually very small.…”

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confidence: 99%

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Anomalous magnetoresistance behavior ofR2Ni3Si5
Mazumdar
¹
,
Nigam
²
,
Nagarajan
³

et al. 1996
Phys. Rev. B
32
3
11
0
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Magnetoresistance ͑MR͒ measurements on the antiferromagnetically ordered polycrystalline R 2 Ni 3 Si 5 ͑R ϭ Pr, Dy, Ho; T N ϭ 8.5 K, 9.5 K, 6.0 K, respectively͒ materials are reported here. Field dependence of MR, measured both below and above their respective ordering temperatures and up to a field of 45 kOe, is found to be anomalous. In all the three cases, in the magnetically ordered state, MR is not monotonic but exhibits a maximum and a minimum. A considerable contribution to MR, with nearly linear field dependence and persisting even above the magnetic ordering temperature, is observed, which is unusual. Temperature dependence of MR ͑in a constant high field͒ above the magnetic ordering temperature, measured up to 100 K, exhibits a pronounced hump. The behavior of magnetoresistance at low temperatures is interpreted in terms of metamagnetism along with a short range ferromagnetic interaction. ͓S0163-1829͑96͒05834-1͔The members of the R 2 Ni 3 Si 5 ͑R ϭ rare earths͒ series exhibit many unusual and interesting magnetic, electrical, and thermal properties. For example, in Ce 2 Ni 3 Si 5 and Eu 2 Ni 3 Si 5 , the rare earth ions are in valence fluctuating state, 1,2 Tb 2 Ni 3 Si 5 shows a double magnetic transition, 3 and magnetic ordering temperatures of many of the members of this series do not follow the well established deGennes scaling. [3][4][5] In order to understand the nature of magnetic interaction in these materials, we have carried out magnetoresistance ͑MR͒ measurements. Here we report our MR results on R 2 Ni 3 Si 5 ͑R ϭ Pr, Dy, Ho͒ which exhibit an anomalous temperature and field dependence.The synthesis and preliminary magnetic properties of R 2 Ni 3 Si 5 ͑R ϭ Pr, Dy, Ho͒ have been reported earlier. 3,5,6 These compounds crystallize in orthorhombic U 2 Co 3 Si 5 -type structure ͑space group Ibam͒. 6 The compounds Pr 2 Ni 3 Si 5 , Dy 2 Ni 3 Si 5 , and, Ho 2 Ni 3 Si 5 order antiferromagnetically with T N ϭ 8.5 K, 9.5 K and 6 K, respectively. High temperature susceptibility follows a Curie-Weiss ͑CW͒ behavior, with a magnetic moment close to the respective free trivalent R moment.Field dependence of MR, ⌬ / (0)"ϭ͓ (H)Ϫ (0)͔/ (0), where (H) is the resistivity measured at magnetic field H…, for Pr 2 Ni 3 Si 5 , Dy 2 Ni 3 Si 5 and Ho 2 Ni 3 Si 5 at different temperatures is shown in Figs. 1, 2, and 3, respectively. An expanded plot of magnetoresistance and magnetization at 6K for Ho 2 Ni 3 Si 5 at low field ͑0-5 kOe͒ is given in Fig. 4 for clarity. For the sake of comparison, MR of Y 2 Ni 3 Si 5 ͑where no magnetic effects associated with R ions are expected as Y is nonmagnetic͒ is also presented here ͑Fig. 5͒.The salient features of MR, common to all the three materials, Pr 2 Ni 3 Si 5 , Dy 2 Ni 3 Si 5 , and Ho 2 Ni 3 Si 5 , are described below taking Dy 2 Ni 3 Si 5 as a typical example ͑Fig. 2͒. ͑a͒ Below the magnetic ordering temperature ͑T N ϭ 9.5 K͒, MR first increases with increasing field, reaches a maximum (ϳ8%͒ at 12 kOe ͑at 4.4 K͒, then decreases and reaches a minimum around 35 kOe and then o...

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confidence: 99%

mentioning

confidence: 99%

Anomalous magnetoresistance behavior ofR2Ni3Si5
Mazumdar
¹
,
Nigam
²
,
Nagarajan
³

et al. 1996
Phys. Rev. B
32
3
11
0
View full text Add to dashboard Cite

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“…Because of the lack of experimental atomic positions for Ce2Ni3Si5, they were assumed as those in other rare-earth nickel silicide (Y2Ni3Si5 [8]). The discussion about the selection of the atomic positions in the 235-type ternary nickel silicides has been carried out elsewhere [17].…”

Section: Methodsmentioning

confidence: 99%

“…So far only two cerium and nickel ternaries possessing the Ibam crystal structure have been reported, these are investigated here Ce2Ni3Si5 [8] and Ce2Ni3Ge5 [9]. The former silicide is a valence-fluctuator [10,11,12] and a paramagnetic [13] member of the R2Ni3Si5 family (where R = rare-earth atom).…”

Section: Introductionmentioning

confidence: 99%

Electronic structure of the heavy-fermion superconductor Ce2Ni3Ge5 and its reference Ce2Ni3Si5 compound by ab initio calculations

Winiarski

Samsel‐Czekała

2013

Journal of Alloys and Compounds

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Band structures of the pressure-induced, heavy-fermion superconductor Ce2Ni3Ge5 and its non-superconducting, mixed-valence isostructural (Ibam) counterpart Ce2Ni3Si5 have been calculated employing the full-potential local-orbital code. Both the local density approximation (LDA) and LDA+U approaches were applied. These investigations were focused particularly on the topology of the Fermi surfaces (FSs) of the compounds. The results show that the FSs are quite similar in these systems and exist in four bands, containing three-dimensional holelike and electronlike sheets. However, the specific FS nesting properties has been revealed only in Ce2Ni3Ge5. They support a previously postulated presence of antiferromagnetic spin fluctuations (SF) in the heavy-fermion superconducting state of this germanide under pressure. Such SF can be responsible for the pressure-induced unconventional superconductivity in this system.

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“…The structure of Ce 2 Ni 3 Si 5 (oI40, Ibam) offers the opportunity to explore a slightly more complicated example of a ternary variant of a binary structure type [86]. The output of PRINCEPS analysis for this phase (Table 5) shows projection qualities significantly lower than those for CeNi 4 Si: most sites have a projection quality ranging between 60% and 80%, and the overall quality is only 63.12%, compared to 91.64% for CeNi 4 Si.…”

Section: Ce 2 Ni 3 Si 5 : Another Ternary Variant Structurementioning

confidence: 99%

PRINCEPS: A Computer-Based Approach to the Structural Description and Recognition of Trends within Structural Databases, and Its Application to the Ce-Ni-Si System

Guo

Fredrickson

2016

Crystals

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Abstract:Intermetallic crystal structures offer an enormous structural diversity, with an endless array of structural motifs whose connection to stability and physical properties are often mysterious. Making sense of the often complex crystal structures that arise here, developing a clear structural description, and identifying connections to other phases can be laborious and require an encyclopedic knowledge of structure types. In this Article, we present PRINCEPS, an algorithm based on a new coordination environment projection scheme that facilitates the structural analysis and comparison of such crystal structures. We demonstrate the potential of this approach by applying it to the complex Ce-Ni-Si ternary system, whose 17 binary and 21 ternary phases would present a daunting challenge to one seeking to understand the system by manual inspection (but has nonetheless been well-described through the heroic efforts of previous researchers). With the help of PRINCEPS, most of the ternary phases in this system can be rationalized as intergrowths of simple structural fragments, and grouped into a handful of structural series (with some outliers). These results illustrate how the PRINCEPS approach can be used to organize a vast collection of crystal structures into structurally meaningful families, and guide the description of complex atomic arrangements.

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Ce2Co3Si5 and R2Ni3Si5 (R ≡ Ce, Dy, Y) with the orthorhombic U2Co3Si5-type structure and the structural relationship with the tetragonaL Sc2Fe3Si5-type structure

Cited by 56 publications

References 5 publications

Anomalous magnetoresistance behavior ofR2Ni3Si5
Mazumdar
¹
,
Nigam
²
,
Nagarajan
³

et al. 1996
Phys. Rev. B
32
3
11
0
View full text Add to dashboard Cite

Anomalous magnetoresistance behavior ofR2Ni3Si5
Mazumdar
¹
,
Nigam
²
,
Nagarajan
³

et al. 1996
Phys. Rev. B
32
3
11
0
View full text Add to dashboard Cite

Electronic structure of the heavy-fermion superconductor Ce2Ni3Ge5 and its reference Ce2Ni3Si5 compound by ab initio calculations

PRINCEPS: A Computer-Based Approach to the Structural Description and Recognition of Trends within Structural Databases, and Its Application to the Ce-Ni-Si System

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Ce2Co3Si5 and R2Ni3Si5 (R ≡ Ce, Dy, Y) with the orthorhombic U2Co3Si5-type structure and the structural relationship with the tetragonaL Sc2Fe3Si5-type structure

Cited by 56 publications

References 5 publications

Anomalous magnetoresistance behavior ofR2Ni3Si5Mazumdar1, Nigam2, Nagarajan3 et al. 1996Phys. Rev. B323110View full textAdd to dashboardCite

Anomalous magnetoresistance behavior ofR2Ni3Si5Mazumdar1, Nigam2, Nagarajan3 et al. 1996Phys. Rev. B323110View full textAdd to dashboardCite

Electronic structure of the heavy-fermion superconductor Ce2Ni3Ge5 and its reference Ce2Ni3Si5 compound by ab initio calculations

PRINCEPS: A Computer-Based Approach to the Structural Description and Recognition of Trends within Structural Databases, and Its Application to the Ce-Ni-Si System

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Anomalous magnetoresistance behavior ofR2Ni3Si5
Mazumdar
¹
,
Nigam
²
,
Nagarajan
³

et al. 1996
Phys. Rev. B
32
3
11
0
View full text Add to dashboard Cite

Anomalous magnetoresistance behavior ofR2Ni3Si5
Mazumdar
¹
,
Nigam
²
,
Nagarajan
³

et al. 1996
Phys. Rev. B
32
3
11
0
View full text Add to dashboard Cite