Inhomogeneous Superconducting Behaviour in La 5Ni 2Si 3

M. Falkowski; A. Kowalczyk; A. M. Strydom; M. Reiffers; T. Toliński

doi:10.1007/s10909-017-1794-y

Inhomogeneous Superconducting Behaviour in La ₅Ni ₂Si ₃

M. Falkowski, A. Kowalczyk, A. M. Strydom, M. Reiffers, T. Toliński

Physics

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

The superconducting phase transition at T_c= 2.3 K was observed for the electrical resistivity ρ(T) and magnetic susceptibility χ(T) measurements in the ternary compound La₅Ni ₂Si ₃ that crystallizes in the hexagonal-type structure. Although a single-phase character with the nominal stoichiometry of the synthesized sample was confirmed, a small trace of the La–Ni phase was found, being probably responsible for the superconducting behaviour in the investigated compound. The magnetization loop recorded at T= 0.5 K resembles a star-like shape which indicates that the density of the critical current can be strongly suppressed by a magnetic field. The low-T_ρ(T) and specific heat C_p(T) data in the normal state reveal simple metallic behaviour. No clear evidence of a phase transition to any long- or short-range order was found for C_p(T) measurements in the T-range of 0.4–300 K.

Original language	English
Pages (from-to)	120-131
Number of pages	12
Journal	Journal of Low Temperature Physics
Volume	189
Issue number	1-2
DOIs	https://doi.org/10.1007/s10909-017-1794-y
Publication status	Published - 1 Oct 2017

Keywords

Crystal structure
Electron transport
Magnetic properties
Superconductivity
Thermodynamic properties

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
General Materials Science
Condensed Matter Physics

Access to Document

10.1007/s10909-017-1794-y

Cite this

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title = "Inhomogeneous Superconducting Behaviour in La 5Ni 2Si 3 ",

abstract = "The superconducting phase transition at Tc= 2.3 K was observed for the electrical resistivity ρ(T) and magnetic susceptibility χ(T) measurements in the ternary compound La5Ni 2Si 3 that crystallizes in the hexagonal-type structure. Although a single-phase character with the nominal stoichiometry of the synthesized sample was confirmed, a small trace of the La–Ni phase was found, being probably responsible for the superconducting behaviour in the investigated compound. The magnetization loop recorded at T= 0.5 K resembles a star-like shape which indicates that the density of the critical current can be strongly suppressed by a magnetic field. The low-Tρ(T) and specific heat Cp(T) data in the normal state reveal simple metallic behaviour. No clear evidence of a phase transition to any long- or short-range order was found for Cp(T) measurements in the T-range of 0.4–300 K.",

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AU - Kowalczyk, A.

AU - Strydom, A. M.

AU - Reiffers, M.

AU - Toliński, T.

PY - 2017/10/1

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N2 - The superconducting phase transition at Tc= 2.3 K was observed for the electrical resistivity ρ(T) and magnetic susceptibility χ(T) measurements in the ternary compound La5Ni 2Si 3 that crystallizes in the hexagonal-type structure. Although a single-phase character with the nominal stoichiometry of the synthesized sample was confirmed, a small trace of the La–Ni phase was found, being probably responsible for the superconducting behaviour in the investigated compound. The magnetization loop recorded at T= 0.5 K resembles a star-like shape which indicates that the density of the critical current can be strongly suppressed by a magnetic field. The low-Tρ(T) and specific heat Cp(T) data in the normal state reveal simple metallic behaviour. No clear evidence of a phase transition to any long- or short-range order was found for Cp(T) measurements in the T-range of 0.4–300 K.

AB - The superconducting phase transition at Tc= 2.3 K was observed for the electrical resistivity ρ(T) and magnetic susceptibility χ(T) measurements in the ternary compound La5Ni 2Si 3 that crystallizes in the hexagonal-type structure. Although a single-phase character with the nominal stoichiometry of the synthesized sample was confirmed, a small trace of the La–Ni phase was found, being probably responsible for the superconducting behaviour in the investigated compound. The magnetization loop recorded at T= 0.5 K resembles a star-like shape which indicates that the density of the critical current can be strongly suppressed by a magnetic field. The low-Tρ(T) and specific heat Cp(T) data in the normal state reveal simple metallic behaviour. No clear evidence of a phase transition to any long- or short-range order was found for Cp(T) measurements in the T-range of 0.4–300 K.

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