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Inhomogeneous Superconducting Behaviour in $$\hbox {La}_{5}\hbox {Ni}_{2}\hbox {Si}_{3}$$ La 5 Ni 2 Si 3

Inhomogeneous Superconducting Behaviour in $$\hbox {La}_{5}\hbox {Ni}_{2}\hbox {Si}_{3}$$ La 5 Ni... The superconducting phase transition at $$T_\mathrm{c} = 2.3$$ T c = 2.3  K was observed for the electrical resistivity $$\rho ({T})$$ ρ ( T ) and magnetic susceptibility $$\chi (T)$$ χ ( T ) measurements in the ternary compound La $$_{5}\hbox {Ni}_{2}\hbox {Si}_{3}$$ 5 Ni 2 Si 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 $${T} = 0.5$$ 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- $$T _{\rho }(T)$$ T ρ ( T ) and specific heat $${C}_\mathrm{p}({T})$$ 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 $$C_\mathrm{p}(T)$$ C p ( T ) measurements in the T-range of 0.4–300 K. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Low Temperature Physics Springer Journals

Inhomogeneous Superconducting Behaviour in $$\hbox {La}_{5}\hbox {Ni}_{2}\hbox {Si}_{3}$$ La 5 Ni 2 Si 3

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References (3)

Publisher
Springer Journals
Copyright
Copyright © 2017 by The Author(s)
Subject
Physics; Condensed Matter Physics; Characterization and Evaluation of Materials; Magnetism, Magnetic Materials
ISSN
0022-2291
eISSN
1573-7357
DOI
10.1007/s10909-017-1794-y
Publisher site
See Article on Publisher Site

Abstract

The superconducting phase transition at $$T_\mathrm{c} = 2.3$$ T c = 2.3  K was observed for the electrical resistivity $$\rho ({T})$$ ρ ( T ) and magnetic susceptibility $$\chi (T)$$ χ ( T ) measurements in the ternary compound La $$_{5}\hbox {Ni}_{2}\hbox {Si}_{3}$$ 5 Ni 2 Si 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 $${T} = 0.5$$ 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- $$T _{\rho }(T)$$ T ρ ( T ) and specific heat $${C}_\mathrm{p}({T})$$ 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 $$C_\mathrm{p}(T)$$ C p ( T ) measurements in the T-range of 0.4–300 K.

Journal

Journal of Low Temperature PhysicsSpringer Journals

Published: Jul 12, 2017

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