Journal ArticleDOI
Structure and superconductivity studies on ternary equiatomic silicides,MM′Si
G.V. Subba Rao,K Wagner,K Wagner,Geetha Balakrishnan,J Janaki,J Janaki,W Paulus,W Paulus,R Schöllhorn,R Schöllhorn,V S Subramanian,U Poppe +11 more
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TLDR
In this article, a series of ternary equiatiomic transition metal silicides have been synthesized and characterized, and the observed properties are explained in terms of the electronic charge transfer effects and crystal structures adopted by these metal excess ternaries.Abstract:
A series of ternary equiatiomic transition metal silicidesMM′Si (M=Zr, Nb, Ta;M′=Ru, Re) and Zr1/2
M
1/2 RuSi (M=Nb, Ta) have been synthesized and characterized. Guinier x-ray data clearly indicate that the compoundsMM′Si (M=Nb, Ta;M′=Ru, Re) crystallize with the orthorhombic TiFeSi-structure. This is contrary to one of the literature reports ascribing the hexagonal ZrRuSi structure toMReSi,M=Nb, Ta. ZrRuSi and Zr1/2
M
1/2RuSi (M=Nb, Ta), however, crystallize with the ZrRuSi structure. All the compounds are metallic and exhibit small and negative Seebeck coefficients. Superconductivity has been discovered inMM′Si,M=Nb, Ta;M′=Ru, Re and the transition temperatures, as measured by the low frequency a.c. susceptibility technique, range from 2·7 to 5·1 K. Zr1/2Nb1/2RuSi is not superconducting above 2·2 K. The observed properties are explained in terms of the electronic charge transfer effects and crystal structures adopted by these metal excess ternary silicides.read more
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Journal ArticleDOI
Relationships between occurrence of superconductivity and crystal structure in new equiatomic ternary silicides MTSi (M = Ti, Zr, Hf and T = Ru, Os, Rh)
TL;DR: In this paper, the complete series of the MTSi compounds (with M = Ti,Zr,Hf and T = Fe,Ru,Os,Co,Rh,Ir) has been obtained.
Journal ArticleDOI
Crystal structure and superconductivity of new ternary MTGe germanides (M = Ti, Zr, Hf and T = Ru, Os, Rh, Ir)
TL;DR: In this article, it was shown that the TiNiSi-type structure favors superconductivity in ternary germanides as previously found for ternaries silicides.
Journal ArticleDOI
Superconducting properties of the non-centrosymmetric Superconductors TaXSi (X= Re, Ru)
K. P. Sajilesh,Ravi Pratap Singh +1 more
TL;DR: In this paper, the ternary noncentrosymmetric superconductors TaXSi (X=Re, Ru) were investigated by magnetization, resistivity, and specific heat measurements.
Journal ArticleDOI
Superconducting properties of the non-centrosymmetric superconductors TaXSi (X = Re, Ru)
Sajilesh K. P,Ravi Pratap Singh +1 more
TL;DR: In this article, a superconducting transition Tc = 5.32 K and 3.91 K for TaReSi and TaRuSi, respectively, and a low value of specific heat jump and the upper critical field concave nature suggests a nontrivial superconducted gap.
Journal ArticleDOI
The structural, mechanical and electronic properties of NbXSi (X=Fe, Co, Ni, Ru, Rh, Pd, Os, Ir and Pt) compounds from first-principles calculations
TL;DR: In this article, the structural, mechanical and electronic properties of ternary equiatomic NbXSi (X = Fe, Co, Ni, Ru, Rh, Pd, Os, Ir and Pt) compounds are investigated.
References
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Journal ArticleDOI
RPtSi phases (R = La, Ce, Pr, Nd, Sm and Gd) with an ordered ThSi2 derivative structure
K. Klepp,Erwin Parthé +1 more
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Alloying behavior of zirconium, hafnium and the actinides in several series of isostructural compounds
TL;DR: In this paper, the crystal structure of intermetallic compounds in ternary systems at the equiatomic composition has been studied and the transition from MgZn 2 to Fe 2 P to MgAgAs-type structures is related to an increase in electron concentration.