Electrical and magnetic properties of the Kondo system (Ce1 - x Yx) Pt2 Si2 (0 ≤ x ≤ 1)

M. B. Tchoula Tchokonté; P. de V. du Plessis; D. Kaczorowski; A. M. Strydom

doi:10.1016/j.physb.2007.10.146

Electrical and magnetic properties of the Kondo system (Ce_{1 - x} Y_x) Pt₂ Si₂ (0 ≤ x ≤ 1)

M. B. Tchoula Tchokonté, P. de V. du Plessis, D. Kaczorowski, A. M. Strydom

Physics

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

1 Citation (Scopus)

Abstract

Measurements of electrical resistivity ρ (T), magnetoresistivity MR and magnetic susceptibility χ (T) are reported for the pseudo-ternary alloys (Ce_{1 - x} Y_x) Pt₂ Si₂. ρ (T) results reveal coherent Kondo scattering above 80% Ce concentration and a rapid evolution to single-ion Kondo scattering with an increase in Y concentration x. MR measurements on Ce alloys in the single-ion Kondo region are analyzed on the basis of calculations by Schlottmann for the Bethe-ansatz solution in the context of the Coqblin-Schrieffer model. The analysis yields values of the Kondo temperature T_K and the effective moment of the Kondo ion μ_K. χ (T) data above 120 K follow the Curie-Weiss relation for all the investigated concentrations and give effective moment values μ_eff in close agreement with μ_eff = 2.54 μ_B expected for the Ce^{3 +}-ion.

Original language	English
Pages (from-to)	1350-1352
Number of pages	3
Journal	Physica B: Condensed Matter
Volume	403
Issue number	5-9
DOIs	https://doi.org/10.1016/j.physb.2007.10.146
Publication status	Published - 1 Apr 2008

Keywords

(Ce Y) Pt Si
Kondo alloys
Magnetic susceptibility
Magnetoresistivity

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1016/j.physb.2007.10.146

Cite this

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title = "Electrical and magnetic properties of the Kondo system (Ce1 - x Yx) Pt2 Si2 (0 ≤ x ≤ 1)",

abstract = "Measurements of electrical resistivity ρ (T), magnetoresistivity MR and magnetic susceptibility χ (T) are reported for the pseudo-ternary alloys (Ce1 - x Yx) Pt2 Si2. ρ (T) results reveal coherent Kondo scattering above 80% Ce concentration and a rapid evolution to single-ion Kondo scattering with an increase in Y concentration x. MR measurements on Ce alloys in the single-ion Kondo region are analyzed on the basis of calculations by Schlottmann for the Bethe-ansatz solution in the context of the Coqblin-Schrieffer model. The analysis yields values of the Kondo temperature TK and the effective moment of the Kondo ion μK. χ (T) data above 120 K follow the Curie-Weiss relation for all the investigated concentrations and give effective moment values μeff in close agreement with μeff = 2.54 μB expected for the Ce3 +-ion.",

keywords = "(Ce Y) Pt Si, Kondo alloys, Magnetic susceptibility, Magnetoresistivity",

author = "{Tchoula Tchokont{\'e}}, {M. B.} and {du Plessis}, {P. de V.} and D. Kaczorowski and Strydom, {A. M.}",

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T1 - Electrical and magnetic properties of the Kondo system (Ce1 - x Yx) Pt2 Si2 (0 ≤ x ≤ 1)

AU - Tchoula Tchokonté, M. B.

AU - du Plessis, P. de V.

AU - Kaczorowski, D.

AU - Strydom, A. M.

PY - 2008/4/1

Y1 - 2008/4/1

N2 - Measurements of electrical resistivity ρ (T), magnetoresistivity MR and magnetic susceptibility χ (T) are reported for the pseudo-ternary alloys (Ce1 - x Yx) Pt2 Si2. ρ (T) results reveal coherent Kondo scattering above 80% Ce concentration and a rapid evolution to single-ion Kondo scattering with an increase in Y concentration x. MR measurements on Ce alloys in the single-ion Kondo region are analyzed on the basis of calculations by Schlottmann for the Bethe-ansatz solution in the context of the Coqblin-Schrieffer model. The analysis yields values of the Kondo temperature TK and the effective moment of the Kondo ion μK. χ (T) data above 120 K follow the Curie-Weiss relation for all the investigated concentrations and give effective moment values μeff in close agreement with μeff = 2.54 μB expected for the Ce3 +-ion.

AB - Measurements of electrical resistivity ρ (T), magnetoresistivity MR and magnetic susceptibility χ (T) are reported for the pseudo-ternary alloys (Ce1 - x Yx) Pt2 Si2. ρ (T) results reveal coherent Kondo scattering above 80% Ce concentration and a rapid evolution to single-ion Kondo scattering with an increase in Y concentration x. MR measurements on Ce alloys in the single-ion Kondo region are analyzed on the basis of calculations by Schlottmann for the Bethe-ansatz solution in the context of the Coqblin-Schrieffer model. The analysis yields values of the Kondo temperature TK and the effective moment of the Kondo ion μK. χ (T) data above 120 K follow the Curie-Weiss relation for all the investigated concentrations and give effective moment values μeff in close agreement with μeff = 2.54 μB expected for the Ce3 +-ion.

KW - (Ce Y) Pt Si

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KW - Magnetic susceptibility

KW - Magnetoresistivity

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